In the Linux kernel, the following vulnerability has been resolved: net_sched: keep alloc_hash updated after hash allocation In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex") I moved cp->hash calculation before the first tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched. This difference could lead to another out of bound access. cp->alloc_hash should always be the size allocated, we should update it after this tcindex_alloc_perfect_hash().

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: net_sched: keep alloc_hash updated     after hash allocation In commit 599be01ee567 (net_sched: fix an OOB access in cls_tcindex) I moved     cp->hash calculation before the first tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched.
    This difference could lead to another out of bound access. cp->alloc_hash should always be the size     allocated, we should update it after this tcindex_alloc_perfect_hash(). (CVE-2020-36791)

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:01982-1 advisory.

    The SUSE Linux Enterprise 15 SP3 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2021-32399: Fixed a race condition when removing the HCI controller (bsc#1184611).
    - CVE-2022-49110: netfilter: conntrack: revisit gc autotuning (bsc#1237981).
    - CVE-2022-49139: Bluetooth: fix null ptr deref on hci_sync_conn_complete_evt (bsc#1238032).
    - CVE-2022-49320: dmaengine: zynqmp_dma: In struct zynqmp_dma_chan fix desc_size data type (bsc#1238394).
    - CVE-2022-49767: 9p/trans_fd: always use O_NONBLOCK read/write (bsc#1242493).
    - CVE-2022-49769: gfs2: Check sb_bsize_shift after reading superblock (bsc#1242440).
    - CVE-2022-49770: ceph: avoid putting the realm twice when decoding snaps fails (bsc#1242597).
    - CVE-2022-49775: tcp: cdg: allow tcp_cdg_release() to be called multiple times (bsc#1242245).
    - CVE-2022-49789: scsi: zfcp: Fix double free of FSF request when qdio send fails (bsc#1242366).
    - CVE-2023-53039: HID: intel-ish-hid: ipc: Fix potential use-after-free in work function (bsc#1242745).
    - CVE-2024-53168: net: make sock_inuse_add() available (bsc#1234887).
    - CVE-2024-56558: nfsd: make sure exp active before svc_export_show (bsc#1235100).
    - CVE-2024-56705: media: atomisp: add check for rgby_data memory allocation failure (bsc#1235568).
    - CVE-2025-21812: ax25: rcu protect dev->ax25_ptr (bsc#1238471).
    - CVE-2025-21999: proc: fix UAF in proc_get_inode() (bsc#1240802).
    - CVE-2025-22028: media: vimc: skip .s_stream() for stopped entities (bsc#1241362).
    - CVE-2025-22121: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() (bsc#1241593).
    - CVE-2025-37789: net: openvswitch: fix nested key length validation in the set() action (bsc#1242762).
    - CVE-2025-37846: arm64: mops: Do not dereference src reg for a set operation (bsc#1242963).
    - CVE-2025-40364: io_uring: fix io_req_prep_async with provided buffers (bsc#1241637).


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 SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:01983-1 advisory.

    The SUSE Linux Enterprise 12 SP5 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2021-47670: can: peak_usb: fix use after free bugs (bsc#1241407).
    - CVE-2022-49139: Bluetooth: fix null ptr deref on hci_sync_conn_complete_evt (bsc#1238032).
    - CVE-2022-49145: ACPI: CPPC: Avoid out of bounds access when parsing _CPC data (bsc#1238162).
    - CVE-2022-49168: btrfs: do not clean up repair bio if submit fails (bsc#1238109).
    - CVE-2022-49190: kernel/resource: fix kfree() of bootmem memory again (bsc#1238130).
    - CVE-2022-49212: mtd: rawnand: atmel: fix refcount issue in atmel_nand_controller_init (bsc#1238331).
    - CVE-2022-49216: drm/tegra: Fix reference leak in tegra_dsi_ganged_probe (bsc#1238338).
    - CVE-2022-49235: ath9k_htc: fix uninit value bugs (bsc#1238333).
    - CVE-2022-49248: ALSA: firewire-lib: fix uninitialized flag for AV/C deferred transaction (bsc#1238284).
    - CVE-2022-49253: media: usb: go7007: s2250-board: fix leak in probe() (bsc#1238420).
    - CVE-2022-49320: dmaengine: zynqmp_dma: In struct zynqmp_dma_chan fix desc_size data type (bsc#1238394).
    - CVE-2022-49326: rtl818x: Prevent using not initialized queues (bsc#1238646).
    - CVE-2022-49371: driver core: fix deadlock in __device_attach (bsc#1238546).
    - CVE-2022-49382: soc: rockchip: Fix refcount leak in rockchip_grf_init (bsc#1238306).
    - CVE-2022-49396: phy: qcom-qmp: fix reset-controller leak on probe errors (bsc#1238289).
    - CVE-2022-49420: net: annotate races around sk->sk_bound_dev_if (bsc#1238887).
    - CVE-2022-49441: tty: fix deadlock caused by calling printk() under tty_port->lock (bsc#1238263).
    - CVE-2022-49445: pinctrl: renesas: core: Fix possible null-ptr-deref in sh_pfc_map_resources()     (bsc#1238019).
    - CVE-2022-49460: PM / devfreq: rk3399_dmc: Disable edev on remove() (bsc#1238892).
    - CVE-2022-49467: drm: msm: fix possible memory leak in mdp5_crtc_cursor_set() (bsc#1238815).
    - CVE-2022-49474: Bluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout (bsc#1238071).
    - CVE-2022-49491: drm/rockchip: vop: fix possible null-ptr-deref in vop_bind() (bsc#1238539).
    - CVE-2022-49503: ath9k_htc: fix potential out of bounds access with invalid rxstatus->rs_keyix     (bsc#1238868).
    - CVE-2022-49592: net: stmmac: fix dma queue left shift overflow issue (bsc#1238311).
    - CVE-2022-49625: sfc: fix kernel panic when creating VF (bsc#1238411).
    - CVE-2022-49635: drm/i915/selftests: fix subtraction overflow bug (bsc#1238806).
    - CVE-2022-49652: dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate (bsc#1238871).
    - CVE-2022-49715: irqchip/gic-v3: Fix refcount leak in gic_populate_ppi_partitions (bsc#1238818).
    - CVE-2022-49728: kABI workaround for changeing the variable length type to size_t (bsc#1239111).
    - CVE-2022-49729: nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred (bsc#1239060).
    - CVE-2022-49751: w1: fix WARNING after calling w1_process() (bsc#1240254).
    - CVE-2022-49761: btrfs: always report error in run_one_delayed_ref() (bsc#1240261).
    - CVE-2022-49772: ALSA: usb-audio: Drop snd_BUG_ON() from snd_usbmidi_output_open() (bsc#1242147).
    - CVE-2022-49775: tcp: cdg: allow tcp_cdg_release() to be called multiple times (bsc#1242245).
    - CVE-2022-49776: macvlan: enforce a consistent minimal mtu (bsc#1242248).
    - CVE-2022-49787: mmc: sdhci-pci: Fix possible memory leak caused by missing pci_dev_put() (bsc#1242352).
    - CVE-2022-49788: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() (bsc#1242353).
    - CVE-2022-49813: net: ena: Fix error handling in ena_init() (bsc#1242497).
    - CVE-2022-49821: mISDN: fix possible memory leak in mISDN_dsp_element_register() (bsc#1242542).
    - CVE-2022-49826: ata: libata-transport: fix double ata_host_put() in ata_tport_add() (bsc#1242549).
    - CVE-2022-49829: drm/scheduler: fix fence ref counting (bsc#1242691).
    - CVE-2022-49832: pinctrl: devicetree: fix null pointer dereferencing in pinctrl_dt_to_map (bsc#1242154).
    - CVE-2022-49835: ALSA: hda: fix potential memleak in 'add_widget_node' (bsc#1242385).
    - CVE-2022-49840: bpf, test_run: Fix alignment problem in bpf_prog_test_run_skb() (bsc#1242447).
    - CVE-2022-49842: ASoC: soc-utils: Remove __exit for snd_soc_util_exit() (bsc#1242484).
    - CVE-2022-49853: net: macvlan: fix memory leaks of macvlan_common_newlink (bsc#1242688).
    - CVE-2022-49861: dmaengine: mv_xor_v2: Fix a resource leak in mv_xor_v2_remove() (bsc#1242580).
    - CVE-2022-49862: tipc: fix the msg->req tlv len check in tipc_nl_compat_name_table_dump_header     (bsc#1242755).
    - CVE-2022-49865: ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network (bsc#1242570).
    - CVE-2022-49871: net: tun: call napi_schedule_prep() to ensure we own a napi (bsc#1242558).
    - CVE-2022-49872: net: gso: fix panic on frag_list with mixed head alloc types (bsc#1242594).
    - CVE-2022-49874: HID: hyperv: fix possible memory leak in mousevsc_probe() (bsc#1242478).
    - CVE-2022-49898: btrfs: fix tree mod log mishandling of reallocated nodes (bsc#1242472).
    - CVE-2022-49907: net: mdio: fix undefined behavior in bit shift for __mdiobus_register (bsc#1242450).
    - CVE-2022-49913: btrfs: fix inode list leak during backref walking at find_parent_nodes() (bsc#1242470).
    - CVE-2022-49914: btrfs: fix inode list leak during backref walking at resolve_indirect_refs()     (bsc#1242427).
    - CVE-2022-49922: nfc: nfcmrvl: Fix potential memory leak in nfcmrvl_i2c_nci_send() (bsc#1242378).
    - CVE-2022-49923: nfc: nxp-nci: Fix potential memory leak in nxp_nci_send() (bsc#1242394).
    - CVE-2022-49924: nfc: fdp: Fix potential memory leak in fdp_nci_send() (bsc#1242426).
    - CVE-2022-49925: RDMA/core: Fix null-ptr-deref in ib_core_cleanup() (bsc#1242371).
    - CVE-2022-49931: IB/hfi1: Correctly move list in sc_disable() (bsc#1242382).
    - CVE-2023-52868: thermal: core: prevent potential string overflow (bsc#1225044).
    - CVE-2023-52975: scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress (bsc#1240322).
    - CVE-2023-52988: ALSA: hda/via: Avoid potential array out-of-bound in add_secret_dac_path()     (bsc#1240293).
    - CVE-2023-52989: firewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region     (bsc#1240266).
    - CVE-2023-52993: x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL (bsc#1240297).
    - CVE-2023-53039: HID: intel-ish-hid: ipc: Fix potential use-after-free in work function (bsc#1242745).
    - CVE-2023-53045: usb: gadget: u_audio: do not let userspace block driver unbind (bsc#1242756).
    - CVE-2023-53066: qed/qed_sriov: guard against NULL derefs from qed_iov_get_vf_info (bsc#1242227).
    - CVE-2023-53079: net/mlx5: Fix steering rules cleanup (bsc#1242765).
    - CVE-2023-53080: xsk: Add missing overflow check in xdp_umem_reg (bsc#1242287).
    - CVE-2023-53094: tty: serial: fsl_lpuart: fix race on RX DMA shutdown (bsc#1242288).
    - CVE-2023-53103: bonding: Fix memory leak when changing bond type to Ethernet (bsc#1242408).
    - CVE-2023-53114: i40e: Fix kernel crash during reboot when adapter is in recovery mode (bsc#1242398).
    - CVE-2023-53139: nfc: fdp: add null check of devm_kmalloc_array in fdp_nci_i2c_read_device_properties     (bsc#1242361).
    - CVE-2024-26740: Fixed use the backlog for mirred ingress  (bsc#1222563).
    - CVE-2024-27010: net/sched: Fix mirred deadlock on device recursion (bsc#1223720).
    - CVE-2024-45021: memcg_write_event_control(): fix a user-triggerable oops (bsc#1230434).
    - CVE-2024-46751: btrfs: do not BUG_ON() when 0 reference count at btrfs_lookup_extent_info()     (bsc#1230786).
    - CVE-2024-46752: btrfs: reduce nesting for extent processing at btrfs_lookup_extent_info() (bsc#1230794).
    - CVE-2024-50106: nfsd: fix race between laundromat and free_stateid() (bsc#1232882).
    - CVE-2024-53168: sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket (bsc#1234887).
    - CVE-2024-56779: nfsd: fix nfs4_openowner leak when concurrent nfsd4_open occur (bsc#1235632).
    - CVE-2025-21648: netfilter: conntrack: clamp maximum hashtable size to INT_MAX (bsc#1236142).
    - CVE-2025-21702: pfifo_tail_enqueue: Drop new packet when sch->limit == 0 (bsc#1237312).
    - CVE-2025-21704: usb: cdc-acm: Check control transfer buffer size before access (bsc#1237571).
    - CVE-2025-21787: team: better TEAM_OPTION_TYPE_STRING validation (bsc#1238774).
    - CVE-2025-21814: ptp: Ensure info->enable callback is always set (bsc#1238473).
    - CVE-2025-22021: netfilter: socket: Lookup orig tuple for IPv6 SNAT (bsc#1241282).
    - CVE-2025-22027: media: streamzap: fix race between device disconnection and urb callback (bsc#1241369).
    - CVE-2025-22050: usbnet:fix NPE during rx_complete (bsc#1241441).
    - CVE-2025-22058: udp: Fix memory accounting leak (bsc#1241332).
    - CVE-2025-22060: net: mvpp2: Prevent parser TCAM memory corruption (bsc#1241526).
    - CVE-2025-22063: netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets (bsc#1241351).
    - CVE-2025-22104: ibmvnic: Use kernel helpers for hex dumps (bsc#1241550).
    - CVE-2025-23136: thermal: int340x: Add NULL check for adev (bsc#1241357).
    - CVE-2025-23150: ext4: fix off-by-one error in do_split (bsc#1242513).
    - CVE-2025-23161: PCI: vmd: Make vmd_dev::cfg_lock a raw_spinlock_t type (bsc#1242792).
    - CVE-2025-37749: net: ppp: Add bound checking for skb data on ppp_sync_txmung (bsc#1242859).
    - CVE-2025-37752: net_sched: sch_sfq: move the limit validation (bsc#1242504).
    - CVE-2025-37780: isofs: Prevent the use of too small fid (bsc#1242786).
    - CVE-2025-37782: hfs/hfsplus: fix slab-out-of-bounds in hfs_bnode_read_key (bsc#1242770).
    - CVE-2025-37789: net: openvswitch: fix nested key length validation in the set() action (bsc#1242762).
    - CVE-2025-37794: wifi: mac80211: Purge vif txq in ieee80211_do_stop() (bsc#1242566).
    - CVE-2025-37796: wifi: at76c50x: fix use after free access in at76_disconnect (bsc#1242727).
    - CVE-2025-37797: net_sched: hfsc: Fix a UAF vulnerability in class handling (bsc#1242417).
    - CVE-2025-37823: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too (bsc#1242924).
    - CVE-2025-37833: net/niu: Niu requires MSIX ENTRY_DATA fields touch before entry reads (bsc#1242868).
    - CVE-2025-37852: drm/amdgpu: handle amdgpu_cgs_create_device() errors in amd_powerplay_create()     (bsc#1243074).
    - CVE-2025-37879: 9p/net: fix improper handling of bogus negative read/write replies (bsc#1243077).
    - CVE-2025-37949: xenbus: Use kref to track req lifetime (bsc#1243541).
    - CVE-2025-37989: net: phy: leds: fix memory leak (bsc#1243511).
    - CVE-2025-38637: net_sched: skbprio: Remove overly strict queue assertions (bsc#1241657).


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 version of kernel installed on the remote host is prior to 5.4.38-17.76. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-011 advisory.

    In the Linux kernel 5.3.10, there is a use-after-free (read) in the perf_trace_lock_acquire function     (related to include/trace/events/lock.h). (CVE-2019-19769)

    A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem. This flaw occurs while     importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible     bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the     'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is     present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while     importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the     system kernel, resulting in a denial of service. (CVE-2020-10711)

    A Use After Free vulnerability in Fedora Linux kernel 5.9.0-rc9 allows attackers to obatin sensitive     information via vgacon_invert_region() function. (CVE-2020-27418)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: keep alloc_hash updated after hash allocation (CVE-2020-36791)

    An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It     ignores the top byte in the address passed to the brk system call, potentially moving the memory break     downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to     cause heap corruption with the GNU C Library malloc implementation. (CVE-2020-9391)

Tenable has extracted the preceding description block directly from the tested product 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 version of kernel installed on the remote host is prior to 4.14.177-139.253. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1440 advisory.

    A flaw was found in the Linux kernel's implementation of the BFQ IO scheduler. This flaw allows a local     user able to groom system memory to cause kernel memory corruption and possible privilege escalation by     abusing a race condition in the IO scheduler. (CVE-2020-12657)

    A flaw was found in the Linux kernel loose validation of child/parent process identification handling     while filtering signal handlers.  A local attacker is able to abuse this flaw to bypass checks to send any     signal to a privileged process. (CVE-2020-12826)

    In the Linux kernel, the following vulnerability has been resolved:

    net_sched: keep alloc_hash updated after hash allocation (CVE-2020-36791)

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

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

ID	Name	Product	Family	Severity
249422	Linux Distros Unpatched Vulnerability : CVE-2020-36791	Nessus	Misc.	high
240812	SUSE SLES15 Security Update : kernel (SUSE-SU-2025:01982-1)	Nessus	SuSE Local Security Checks	high
240793	SUSE SLES12 Security Update : kernel (SUSE-SU-2025:01983-1)	Nessus	SuSE Local Security Checks	high
160458	Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-011)	Nessus	Amazon Linux Local Security Checks	medium
137571	Amazon Linux 2 : kernel (ALAS-2020-1440)	Nessus	Amazon Linux Local Security Checks	high

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CVE-2020-36791

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Tenable Plugins

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