In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt If an AX25 device is bound to a socket by setting the SO_BINDTODEVICE socket option, a refcount leak will occur in ax25_release(). Commit 9fd75b66b8f6 ("ax25: Fix refcount leaks caused by ax25_cb_del()") added decrement of device refcounts in ax25_release(). In order for that to work correctly the refcounts must already be incremented when the device is bound to the socket. An AX25 device can be bound to a socket by either calling ax25_bind() or setting SO_BINDTODEVICE socket option. In both cases the refcounts should be incremented, but in fact it is done only in ax25_bind(). This bug leads to the following issue reported by Syzkaller: ================================================================ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 1 PID: 5932 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Modules linked in: CPU: 1 UID: 0 PID: 5932 Comm: syz-executor424 Not tainted 6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31 Call Trace: <TASK> __refcount_dec include/linux/refcount.h:336 [inline] refcount_dec include/linux/refcount.h:351 [inline] ref_tracker_free+0x710/0x820 lib/ref_tracker.c:236 netdev_tracker_free include/linux/netdevice.h:4156 [inline] netdev_put include/linux/netdevice.h:4173 [inline] netdev_put include/linux/netdevice.h:4169 [inline] ax25_release+0x33f/0xa10 net/ax25/af_ax25.c:1069 __sock_release+0xb0/0x270 net/socket.c:640 sock_close+0x1c/0x30 net/socket.c:1408 ... do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f ... </TASK> ================================================================ Fix the implementation of ax25_setsockopt() by adding increment of refcounts for the new device bound, and decrement of refcounts for the old unbound device.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:01614-1 advisory.

    The SUSE Linux Enterprise 15 SP6 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2024-28956: x86/ibt: Keep IBT disabled during alternative patching (bsc#1242006).
    - CVE-2024-35840: mptcp: use OPTION_MPTCP_MPJ_SYNACK in subflow_finish_connect() (bsc#1224597).
    - CVE-2024-50038: netfilter: xtables: fix typo causing some targets not to load on IPv6 (bsc#1231910).
    - CVE-2024-50162: bpf: selftests: send packet to devmap redirect XDP (bsc#1233075).
    - CVE-2024-50163: bpf: Make sure internal and UAPI bpf_redirect flags do not overlap (bsc#1233098).
    - CVE-2024-53124: net: fix data-races around sk->sk_forward_alloc (bsc#1234074).
    - CVE-2024-53139: sctp: fix possible UAF in sctp_v6_available() (bsc#1234157).
    - CVE-2024-57924: fs: relax assertions on failure to encode file handles (bsc#1236086).
    - CVE-2024-58018: nvkm: correctly calculate the available space of the GSP cmdq buffer (bsc#1238990).
    - CVE-2024-58068: OPP: fix dev_pm_opp_find_bw_*() when bandwidth table not initialized (bsc#1238961).
    - CVE-2024-58070: bpf: bpf_local_storage: Always use bpf_mem_alloc in PREEMPT_RT (bsc#1238983).
    - CVE-2024-58071: team: prevent adding a device which is already a team device lower (bsc#1238970).
    - CVE-2024-58088: bpf: Fix deadlock when freeing cgroup storage (bsc#1239510).
    - CVE-2025-21683: bpf: Fix bpf_sk_select_reuseport() memory leak (bsc#1236704).
    - CVE-2025-21696: mm: clear uffd-wp PTE/PMD state on mremap() (bsc#1237111).
    - CVE-2025-21707: mptcp: consolidate suboption status (bsc#1238862).
    - CVE-2025-21729: wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion (bsc#1237874).
    - CVE-2025-21755: vsock: Orphan socket after transport release (bsc#1237882).
    - CVE-2025-21758: ipv6: mcast: add RCU protection to mld_newpack() (bsc#1238737).
    - CVE-2025-21768: net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels (bsc#1238714).
    - CVE-2025-21792: ax25: Fix refcount leak caused by setting SO_BINDTODEVICE sockopt (bsc#1238745).
    - CVE-2025-21806: net: let net.core.dev_weight always be non-zero (bsc#1238746).
    - CVE-2025-21808: net: xdp: Disallow attaching device-bound programs in generic mode (bsc#1238742).
    - CVE-2025-21812: ax25: rcu protect dev->ax25_ptr (bsc#1238471).
    - CVE-2025-21833: iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE (bsc#1239108).
    - CVE-2025-21836: io_uring/kbuf: reallocate buf lists on upgrade (bsc#1239066).
    - CVE-2025-21854: selftest/bpf: Add vsock test for sockmap rejecting unconnected (bsc#1239470).
    - CVE-2025-21863: io_uring: prevent opcode speculation (bsc#1239475).
    - CVE-2025-21867: bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() (bsc#1240181).
    - CVE-2025-21873: scsi: ufs: core: bsg: Fix crash when arpmb command fails (bsc#1240184).
    - CVE-2025-21875: mptcp: always handle address removal under msk socket lock (bsc#1240168).
    - CVE-2025-21881: uprobes: Reject the shared zeropage in uprobe_write_opcode() (bsc#1240185).
    - CVE-2025-21884: net: better track kernel sockets lifetime (bsc#1240171).
    - CVE-2025-21887: ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up (bsc#1240176).
    - CVE-2025-21889: perf/core: Add RCU read lock protection to perf_iterate_ctx() (bsc#1240167).
    - CVE-2025-21894: net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC (bsc#1240581).
    - CVE-2025-21895: perf/core: Order the PMU list to fix warning about unordered pmu_ctx_list (bsc#1240585).
    - CVE-2025-21904: caif_virtio: fix wrong pointer check in cfv_probe() (bsc#1240576).
    - CVE-2025-21906: wifi: iwlwifi: mvm: clean up ROC on failure (bsc#1240587).
    - CVE-2025-21908: NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback (bsc#1240600).
    - CVE-2025-21913: x86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range() (bsc#1240591).
    - CVE-2025-21922: ppp: Fix KMSAN uninit-value warning with bpf (bsc#1240639).
    - CVE-2025-21924: net: hns3: make sure ptp clock is unregister and freed if hclge_ptp_get_cycle returns an     error (bsc#1240720).
    - CVE-2025-21925: llc: do not use skb_get() before dev_queue_xmit() (bsc#1240713).
    - CVE-2025-21926: net: gso: fix ownership in __udp_gso_segment (bsc#1240712).
    - CVE-2025-21931: hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio (bsc#1240709).
    - CVE-2025-21957: scsi: qla1280: Fix kernel oops when debug level > 2 (bsc#1240742).
    - CVE-2025-21960: eth: bnxt: do not update checksum in bnxt_xdp_build_skb() (bsc#1240815).
    - CVE-2025-21961: eth: bnxt: fix truesize for mb-xdp-pass case (bsc#1240816).
    - CVE-2025-21962: cifs: Fix integer overflow while processing closetimeo mount option (bsc#1240655).
    - CVE-2025-21963: cifs: Fix integer overflow while processing acdirmax mount option (bsc#1240717).
    - CVE-2025-21964: cifs: Fix integer overflow while processing acregmax mount option (bsc#1240740).
    - CVE-2025-21969: kABI workaround for l2cap_conn changes (bsc#1240784).
    - CVE-2025-21970: net/mlx5: Bridge, fix the crash caused by LAG state check (bsc#1240819).
    - CVE-2025-21972: net: mctp: unshare packets when reassembling (bsc#1240813).
    - CVE-2025-21975: net/mlx5: handle errors in mlx5_chains_create_table() (bsc#1240812).
    - CVE-2025-21980: sched: address a potential NULL pointer dereference in the GRED scheduler (bsc#1240809).
    - CVE-2025-21981: ice: fix memory leak in aRFS after reset (bsc#1240612).
    - CVE-2025-21985: drm/amd/display: Fix out-of-bound accesses (bsc#1240811).
    - CVE-2025-21991: x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes (bsc#1240795).
    - CVE-2025-21993: iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic() (bsc#1240797).
    - CVE-2025-21999: proc: fix UAF in proc_get_inode() (bsc#1240802).
    - CVE-2025-22004: net: atm: fix use after free in lec_send() (bsc#1240835).
    - CVE-2025-22015: mm/migrate: fix shmem xarray update during migration (bsc#1240944).
    - CVE-2025-22016: dpll: fix xa_alloc_cyclic() error handling (bsc#1240934).
    - CVE-2025-22017: devlink: fix xa_alloc_cyclic() error handling (bsc#1240936).
    - CVE-2025-22018: atm: Fix NULL pointer dereference (bsc#1241266).
    - CVE-2025-22029: exec: fix the racy usage of fs_struct->in_exec (bsc#1241378).
    - CVE-2025-22036: exfat: fix random stack corruption after get_block (bsc#1241426).
    - CVE-2025-22045: x86/mm: Fix flush_tlb_range() when used for zapping normal PMDs (bsc#1241433).
    - CVE-2025-22053: net: ibmveth: make veth_pool_store stop hanging (bsc#1241373).
    - CVE-2025-22055: net: fix geneve_opt length integer overflow (bsc#1241371).
    - CVE-2025-22058: udp: Fix memory accounting leak (bsc#1241332).
    - CVE-2025-22060: net: mvpp2: Prevent parser TCAM memory corruption (bsc#1241526).
    - CVE-2025-22064: netfilter: nf_tables: do not unregister hook when table is dormant (bsc#1241413).
    - CVE-2025-22080: fs/ntfs3: Prevent integer overflow in hdr_first_de() (bsc#1241416).
    - CVE-2025-22090: mm: (un)track_pfn_copy() fix + doc improvements (bsc#1241537).
    - CVE-2025-22102: Bluetooth: btnxpuart: Fix kernel panic during FW release (bsc#1241456).
    - CVE-2025-22104: ibmvnic: Use kernel helpers for hex dumps (bsc#1241550).
    - CVE-2025-22105, CVE-2025-37860: Add missing bugzilla references (bsc#1241452 bsc#1241548).
    - CVE-2025-22107: net: dsa: sja1105: fix kasan out-of-bounds warning in sja1105_table_delete_entry()     (bsc#1241575).
    - CVE-2025-22109: ax25: Remove broken autobind (bsc#1241573).
    - CVE-2025-22115: btrfs: fix block group refcount race in btrfs_create_pending_block_groups()     (bsc#1241578).
    - CVE-2025-22121: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() (bsc#1241593).
    - CVE-2025-2312: CIFS: New mount option for cifs.upcall namespace resolution (bsc#1239684).
    - CVE-2025-23133: wifi: ath11k: update channel list in reg notifier instead reg worker (bsc#1241451).
    - CVE-2025-23138: watch_queue: fix pipe accounting mismatch (bsc#1241648).
    - CVE-2025-23145: mptcp: fix NULL pointer in can_accept_new_subflow (bsc#1242596).
    - CVE-2025-37785: ext4: fix OOB read when checking dotdot dir (bsc#1241640).
    - CVE-2025-37798: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() (bsc#1242414).
    - CVE-2025-37799: vmxnet3: Fix malformed packet sizing in vmxnet3_process_xdp (bsc#1242283).
    - CVE-2025-39728: clk: samsung: Fix UBSAN panic in samsung_clk_init() (bsc#1241626).


Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 24.04 LTS / 24.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7521-1 advisory.

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - ARM64 architecture;

    - PowerPC architecture;

    - x86 architecture;

    - Block layer subsystem;

    - Serial ATA and Parallel ATA drivers;

    - Drivers core;

    - Network block device driver;

    - Bluetooth drivers;

    - Character device driver;

    - TPM device driver;

    - Clock framework and drivers;

    - Hardware crypto device drivers;

    - FireWire subsystem;

    - EFI core;

    - Qualcomm firmware drivers;

    - GPIO subsystem;

    - GPU drivers;

    - HID subsystem;

    - I2C subsystem;

    - I3C subsystem;

    - InfiniBand drivers;

    - Input Device (Mouse) drivers;

    - IOMMU subsystem;

    - Multiple devices driver;

    - Media drivers;

    - NVIDIA Tegra memory controller driver;

    - Fastrpc Driver;

    - Network drivers;

    - Operating Performance Points (OPP) driver;

    - PCI subsystem;

    - x86 platform drivers;

    - PPS (Pulse Per Second) driver;

    - PTP clock framework;

    - Remote Processor subsystem;

    - Real Time Clock drivers;

    - S/390 drivers;

    - SCSI subsystem;

    - QCOM SoC drivers;

    - SPI subsystem;

    - Media staging drivers;

    - Trusted Execution Environment drivers;

    - TTY drivers;

    - UFS subsystem;

    - USB Device Class drivers;

    - USB core drivers;

    - USB Gadget drivers;

    - USB Host Controller drivers;

    - Framebuffer layer;

    - File systems infrastructure;

    - BTRFS file system;

    - Ceph distributed file system;

    - Network file system (NFS) client;

    - Network file system (NFS) server daemon;

    - NILFS2 file system;

    - Overlay file system;

    - SMB network file system;

    - UBI file system;

    - BPF subsystem;

    - Timer subsystem;

    - KVM subsystem;

    - Networking core;

    - ptr_ring data structure definitions;

    - Networking subsytem;

    - Amateur Radio drivers;

    - L3 Master device support module;

    - TCP network protocol;

    - XFRM subsystem;

    - Tracing infrastructure;

    - io_uring subsystem;

    - Process Accounting mechanism;

    - Perf events;

    - Padata parallel execution mechanism;

    - printk logging mechanism;

    - Scheduler infrastructure;

    - Workqueue subsystem;

    - Memory management;

    - B.A.T.M.A.N. meshing protocol;

    - Bluetooth subsystem;

    - IPv4 networking;

    - IPv6 networking;

    - MAC80211 subsystem;

    - Multipath TCP;

    - Netfilter;

    - NFC subsystem;

    - Open vSwitch;

    - Rose network layer;

    - RxRPC session sockets;

    - Network traffic control;

    - Wireless networking;

    - Key management;

    - Landlock security;

    - Linux Security Modules (LSM) Framework;

    - Tomoyo security module;

    - SoC audio core drivers;

    - SOF drivers; (CVE-2025-21737, CVE-2025-21711, CVE-2025-21987, CVE-2025-21848, CVE-2024-49570,     CVE-2025-21762, CVE-2025-21738, CVE-2025-21712, CVE-2025-21719, CVE-2025-21870, CVE-2024-57984,     CVE-2025-21815, CVE-2025-21744, CVE-2024-58058, CVE-2024-58078, CVE-2024-57990, CVE-2024-54458,     CVE-2025-21899, CVE-2025-21814, CVE-2025-21746, CVE-2024-54456, CVE-2025-21739, CVE-2024-58057,     CVE-2025-21855, CVE-2025-21758, CVE-2024-58006, CVE-2024-58007, CVE-2025-21720, CVE-2024-58090,     CVE-2025-21852, CVE-2024-57982, CVE-2024-58013, CVE-2024-58082, CVE-2025-21825, CVE-2024-58072,     CVE-2024-57996, CVE-2025-21787, CVE-2025-21742, CVE-2025-21705, CVE-2025-21829, CVE-2024-58060,     CVE-2025-21811, CVE-2025-21900, CVE-2025-21853, CVE-2025-21809, CVE-2025-21938, CVE-2025-21728,     CVE-2025-21785, CVE-2025-21732, CVE-2025-21888, CVE-2025-21768, CVE-2025-21875, CVE-2025-21721,     CVE-2025-21766, CVE-2025-21892, CVE-2024-57953, CVE-2025-21772, CVE-2025-21735, CVE-2024-58017,     CVE-2024-58086, CVE-2024-58084, CVE-2025-21761, CVE-2024-58008, CVE-2024-57988, CVE-2025-21874,     CVE-2024-58011, CVE-2025-21706, CVE-2024-57999, CVE-2025-21858, CVE-2024-58061, CVE-2025-21727,     CVE-2025-21780, CVE-2024-58051, CVE-2025-21791, CVE-2025-21788, CVE-2025-21786, CVE-2024-58012,     CVE-2024-58010, CVE-2024-58001, CVE-2025-21844, CVE-2025-21708, CVE-2024-57834, CVE-2025-21873,     CVE-2025-21704, CVE-2025-21765, CVE-2025-21839, CVE-2025-21723, CVE-2024-57974, CVE-2025-21876,     CVE-2025-21782, CVE-2025-21866, CVE-2024-58076, CVE-2025-21724, CVE-2025-21895, CVE-2025-21770,     CVE-2025-21835, CVE-2024-58052, CVE-2025-21827, CVE-2024-58069, CVE-2025-21828, CVE-2025-21734,     CVE-2025-21781, CVE-2025-21971, CVE-2025-21775, CVE-2024-52559, CVE-2024-58020, CVE-2025-21713,     CVE-2024-58068, CVE-2024-58018, CVE-2025-21806, CVE-2025-21802, CVE-2025-21731, CVE-2025-21741,     CVE-2025-21847, CVE-2025-21767, CVE-2024-58003, CVE-2024-57993, CVE-2025-21725, CVE-2025-21796,     CVE-2025-21764, CVE-2025-21862, CVE-2025-21733, CVE-2024-58075, CVE-2025-21808, CVE-2024-58034,     CVE-2025-21707, CVE-2024-58080, CVE-2025-21784, CVE-2024-57994, CVE-2025-21890, CVE-2025-21754,     CVE-2024-58063, CVE-2025-21826, CVE-2025-21821, CVE-2024-58079, CVE-2024-58056, CVE-2025-21798,     CVE-2024-58077, CVE-2024-58019, CVE-2025-21748, CVE-2025-21759, CVE-2024-58004, CVE-2024-58081,     CVE-2024-57978, CVE-2025-21865, CVE-2024-58002, CVE-2025-21810, CVE-2025-21743, CVE-2024-57989,     CVE-2025-21718, CVE-2024-57987, CVE-2025-21877, CVE-2024-57973, CVE-2024-58070, CVE-2024-58071,     CVE-2025-21891, CVE-2024-58021, CVE-2024-58016, CVE-2024-58005, CVE-2025-21760, CVE-2025-21883,     CVE-2025-21878, CVE-2025-21881, CVE-2025-21838, CVE-2025-21783, CVE-2024-57986, CVE-2025-21793,     CVE-2025-21859, CVE-2025-21792, CVE-2025-21820, CVE-2025-21799, CVE-2025-21750, CVE-2025-21795,     CVE-2025-21854, CVE-2025-21836, CVE-2025-21726, CVE-2025-21846, CVE-2025-21864, CVE-2024-57977,     CVE-2025-21887, CVE-2025-21710, CVE-2025-21889, CVE-2025-21812, CVE-2025-21773, CVE-2024-57852,     CVE-2025-21856, CVE-2025-21871, CVE-2025-21763, CVE-2024-58064, CVE-2025-21804, CVE-2024-58055,     CVE-2025-21898, CVE-2025-21776, CVE-2025-21869, CVE-2025-21745, CVE-2025-21736, CVE-2025-21716,     CVE-2024-57981, CVE-2024-57979, CVE-2025-21715, CVE-2024-57998, CVE-2025-21790, CVE-2024-58085,     CVE-2025-21749, CVE-2024-58088, CVE-2025-21753, CVE-2025-21851, CVE-2024-58054, CVE-2025-21830,     CVE-2025-21832, CVE-2024-57980, CVE-2025-21885, CVE-2025-21863, CVE-2024-58053, CVE-2025-21823,     CVE-2025-21857, CVE-2024-58083, CVE-2024-58014, CVE-2025-21816, CVE-2025-21779, CVE-2025-21872,     CVE-2024-57997, CVE-2025-21867, CVE-2024-57985, CVE-2025-21831, CVE-2025-21801, CVE-2025-21868,     CVE-2025-21849)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4102 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4102-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                        Ben Hutchings     March 31, 2025                                https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : linux-6.1     Version        : 6.1.129-1~deb11u1     CVE ID         : CVE-2024-26596 CVE-2024-40945 CVE-2024-42069 CVE-2024-42122                      CVE-2024-45001 CVE-2024-47726 CVE-2024-49989 CVE-2024-50061                      CVE-2024-54458 CVE-2024-56549 CVE-2024-57834 CVE-2024-57973                      CVE-2024-57978 CVE-2024-57979 CVE-2024-57980 CVE-2024-57981                      CVE-2024-57986 CVE-2024-57993 CVE-2024-57996 CVE-2024-57997                      CVE-2024-57998 CVE-2024-58001 CVE-2024-58007 CVE-2024-58009                      CVE-2024-58010 CVE-2024-58011 CVE-2024-58013 CVE-2024-58014                      CVE-2024-58016 CVE-2024-58017 CVE-2024-58020 CVE-2024-58034                      CVE-2024-58051 CVE-2024-58052 CVE-2024-58054 CVE-2024-58055                      CVE-2024-58056 CVE-2024-58058 CVE-2024-58061 CVE-2024-58063                      CVE-2024-58068 CVE-2024-58069 CVE-2024-58071 CVE-2024-58072                      CVE-2024-58076 CVE-2024-58077 CVE-2024-58080 CVE-2024-58083                      CVE-2024-58085 CVE-2024-58086 CVE-2025-21684 CVE-2025-21700                      CVE-2025-21701 CVE-2025-21703 CVE-2025-21704 CVE-2025-21705                      CVE-2025-21706 CVE-2025-21707 CVE-2025-21708 CVE-2025-21711                      CVE-2025-21715 CVE-2025-21716 CVE-2025-21718 CVE-2025-21719                      CVE-2025-21722 CVE-2025-21724 CVE-2025-21725 CVE-2025-21726                      CVE-2025-21727 CVE-2025-21728 CVE-2025-21731 CVE-2025-21734                      CVE-2025-21735 CVE-2025-21736 CVE-2025-21738 CVE-2025-21744                      CVE-2025-21745 CVE-2025-21748 CVE-2025-21749 CVE-2025-21750                      CVE-2025-21753 CVE-2025-21758 CVE-2025-21760 CVE-2025-21761                      CVE-2025-21762 CVE-2025-21763 CVE-2025-21764 CVE-2025-21765                      CVE-2025-21766 CVE-2025-21767 CVE-2025-21772 CVE-2025-21775                      CVE-2025-21776 CVE-2025-21779 CVE-2025-21780 CVE-2025-21781                      CVE-2025-21782 CVE-2025-21785 CVE-2025-21787 CVE-2025-21790                      CVE-2025-21791 CVE-2025-21792 CVE-2025-21794 CVE-2025-21795                      CVE-2025-21796 CVE-2025-21799 CVE-2025-21802 CVE-2025-21804                      CVE-2025-21806 CVE-2025-21811 CVE-2025-21812 CVE-2025-21814                      CVE-2025-21819 CVE-2025-21820 CVE-2025-21821 CVE-2025-21823                      CVE-2025-21826 CVE-2025-21829 CVE-2025-21830 CVE-2025-21832                      CVE-2025-21835     Debian Bug     : 1071562 1087807 1088159 1091517 1091858 1093371 1095435                      1095745 1095764 1098250 1098354 1099138

    Several vulnerabilities have been discovered in the Linux kernel that     may lead to a privilege escalation, denial of service or information     leaks.

    For Debian 11 bullseye, these problems have been fixed in version     6.1.129-1~deb11u1.  This additionally includes many more bug fixes     from stable update 6.1.129, and a fix for a regression affecting some     Rockchip SoCs.

    We recommend that you upgrade your linux-6.1 packages.

    For the detailed security status of linux-6.1 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/linux-6.1

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In the Linux kernel, the following vulnerability has been resolved: ax25: Fix refcount leak caused by     setting SO_BINDTODEVICE sockopt If an AX25 device is bound to a socket by setting the SO_BINDTODEVICE     socket option, a refcount leak will occur in ax25_release(). Commit 9fd75b66b8f6 (ax25: Fix refcount     leaks caused by ax25_cb_del()) added decrement of device refcounts in ax25_release(). In order for that     to work correctly the refcounts must already be incremented when the device is bound to the socket. An     AX25 device can be bound to a socket by either calling ax25_bind() or setting SO_BINDTODEVICE socket     option. In both cases the refcounts should be incremented, but in fact it is done only in ax25_bind().
    This bug leads to the following issue reported by Syzkaller:
    ================================================================ refcount_t: decrement hit 0; leaking     memory. WARNING: CPU: 1 PID: 5932 at lib/refcount.c:31 refcount_warn_saturate+0x1ed/0x210     lib/refcount.c:31 Modules linked in: CPU: 1 UID: 0 PID: 5932 Comm: syz-executor424 Not tainted     6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS     1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:refcount_warn_saturate+0x1ed/0x210 lib/refcount.c:31     Call Trace: <TASK> __refcount_dec include/linux/refcount.h:336 [inline] refcount_dec     include/linux/refcount.h:351 [inline] ref_tracker_free+0x710/0x820 lib/ref_tracker.c:236     netdev_tracker_free include/linux/netdevice.h:4156 [inline] netdev_put include/linux/netdevice.h:4173     [inline] netdev_put include/linux/netdevice.h:4169 [inline] ax25_release+0x33f/0xa10     net/ax25/af_ax25.c:1069 __sock_release+0xb0/0x270 net/socket.c:640 sock_close+0x1c/0x30 net/socket.c:1408     ... do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83     entry_SYSCALL_64_after_hwframe+0x77/0x7f ... </TASK>     ================================================================ Fix the implementation of     ax25_setsockopt() by adding increment of refcounts for the new device bound, and decrement of refcounts     for the old unbound device. (CVE-2025-21792)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
237088	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2025:01614-1)	Nessus	SuSE Local Security Checks	medium
236983	Ubuntu 24.04 LTS / 24.10 : Linux kernel vulnerabilities (USN-7521-1)	Nessus	Ubuntu Local Security Checks	high
233595	Debian dla-4102 : linux-config-6.1 - security update	Nessus	Debian Local Security Checks	high
230879	Linux Distros Unpatched Vulnerability : CVE-2025-21792	Nessus	Misc.	medium

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CVE-2025-21792

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