In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Avoid using sk_socket after free when sending The sk->sk_socket is not locked or referenced in backlog thread, and during the call to skb_send_sock(), there is a race condition with the release of sk_socket. All types of sockets(tcp/udp/unix/vsock) will be affected. Race conditions: ''' CPU0 CPU1 backlog::skb_send_sock sendmsg_unlocked sock_sendmsg sock_sendmsg_nosec close(fd): ... ops->release() -> sock_map_close() sk_socket->ops = NULL free(socket) sock->ops->sendmsg ^ panic here ''' The ref of psock become 0 after sock_map_close() executed. ''' void sock_map_close() { ... if (likely(psock)) { ... // !! here we remove psock and the ref of psock become 0 sock_map_remove_links(sk, psock) psock = sk_psock_get(sk); if (unlikely(!psock)) goto no_psock; <=== Control jumps here via goto ... cancel_delayed_work_sync(&psock->work); <=== not executed sk_psock_put(sk, psock); ... } ''' Based on the fact that we already wait for the workqueue to finish in sock_map_close() if psock is held, we simply increase the psock reference count to avoid race conditions. With this patch, if the backlog thread is running, sock_map_close() will wait for the backlog thread to complete and cancel all pending work. If no backlog running, any pending work that hasn't started by then will fail when invoked by sk_psock_get(), as the psock reference count have been zeroed, and sk_psock_drop() will cancel all jobs via cancel_delayed_work_sync(). In summary, we require synchronization to coordinate the backlog thread and close() thread. The panic I catched: ''' Workqueue: events sk_psock_backlog RIP: 0010:sock_sendmsg+0x21d/0x440 RAX: 0000000000000000 RBX: ffffc9000521fad8 RCX: 0000000000000001 ... Call Trace: <TASK> ? die_addr+0x40/0xa0 ? exc_general_protection+0x14c/0x230 ? asm_exc_general_protection+0x26/0x30 ? sock_sendmsg+0x21d/0x440 ? sock_sendmsg+0x3e0/0x440 ? __pfx_sock_sendmsg+0x10/0x10 __skb_send_sock+0x543/0xb70 sk_psock_backlog+0x247/0xb80 ... '''

vendor_unpatched cve-2025-38154: Unpatched CVEs for Debian Linux, Red Hat Enterprise Linux, Ubuntu Linux (cve-2025-38154)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1111 advisory.

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

    Drivers: hv: vmbus: Leak pages if set_memory_encrypted() fails (CVE-2024-36913)

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

    xfs: don't walk off the end of a directory data block (CVE-2024-41013)

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

    mm: hugetlb: independent PMD page table shared count (CVE-2024-57883)

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

    bpf: Fix kmemleak warning for percpu hashmap (CVE-2025-37807)

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

    mm/huge_memory: fix dereferencing invalid pmd migration entry (CVE-2025-37958)

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

    net_sched: prio: fix a race in prio_tune() (CVE-2025-38083)

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

    mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084)

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

    net_sched: red: fix a race in __red_change() (CVE-2025-38108)

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

    net/mdiobus: Fix potential out-of-bounds read/write access (CVE-2025-38111)

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

    net: Fix TOCTOU issue in sk_is_readable() (CVE-2025-38112)

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

    ACPI: CPPC: Fix NULL pointer dereference when nosmp is used (CVE-2025-38113)

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

    net_sched: sch_sfq: fix a potential crash on gso_skb handling (CVE-2025-38115)

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

    net: fix udp gso skb_segment after pull from frag_list (CVE-2025-38124)

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

    net: openvswitch: Fix the dead loop of MPLS parse (CVE-2025-38146)

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

    calipso: Don't call calipso functions for AF_INET sk. (CVE-2025-38147)

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

    bpf, sockmap: Avoid using sk_socket after free when sending (CVE-2025-38154)

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

    RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction (CVE-2025-38161)

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

    net_sched: sch_sfq: reject invalid perturb period (CVE-2025-38193)

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

    fbdev: Fix do_register_framebuffer to prevent null-ptr-deref in fb_videomode_to_var (CVE-2025-38215)

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

    nfsd: Initialize ssc before laundromat_work to prevent NULL dereference (CVE-2025-38231)

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

    af_unix: Don't leave consecutive consumed OOB skbs. (CVE-2025-38236)

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

    bpf: Avoid __bpf_prog_ret0_warn when jit fails (CVE-2025-38280)

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

    bpf: Fix WARN() in get_bpf_raw_tp_regs (CVE-2025-38285)

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

    ptp: remove ptp->n_vclocks check logic in ptp_vclock_in_use() (CVE-2025-38305)

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

    fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (CVE-2025-38312)

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

    mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). (CVE-2025-38324)

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.

An update of the linux package has been released.

The version of kernel installed on the remote host is prior to 5.15.186-128.192. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2025-082 advisory.

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

    mm/khugepaged: fix ->anon_vma race (CVE-2023-52935)

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

    mm: hugetlb: independent PMD page table shared count (CVE-2024-57883)

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

    net_sched: sch_sfq: don't allow 1 packet limit (CVE-2024-57996)

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

    mm/huge_memory: fix dereferencing invalid pmd migration entry (CVE-2025-37958)

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

    net_sched: prio: fix a race in prio_tune() (CVE-2025-38083)

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

    mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084)

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

    x86/iopl: Cure TIF_IO_BITMAP inconsistencies (CVE-2025-38100)

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

    net_sched: ets: fix a race in ets_qdisc_change() (CVE-2025-38107)

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

    net_sched: red: fix a race in __red_change() (CVE-2025-38108)

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

    net/mdiobus: Fix potential out-of-bounds read/write access (CVE-2025-38111)

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

    net: Fix TOCTOU issue in sk_is_readable() (CVE-2025-38112)

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

    net_sched: sch_sfq: fix a potential crash on gso_skb handling (CVE-2025-38115)

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

    net: openvswitch: Fix the dead loop of MPLS parse (CVE-2025-38146)

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

    calipso: Don't call calipso functions for AF_INET sk. (CVE-2025-38147)

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

    bpf, sockmap: Avoid using sk_socket after free when sending (CVE-2025-38154)

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

    RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction (CVE-2025-38161)

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

    net_sched: sch_sfq: reject invalid perturb period (CVE-2025-38193)

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

    exfat: fix double free in delayed_free (CVE-2025-38206)

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

    nfsd: Initialize ssc before laundromat_work to prevent NULL dereference (CVE-2025-38231)

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

    bpf: Avoid __bpf_prog_ret0_warn when jit fails (CVE-2025-38280)

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

    bpf: Fix WARN() in get_bpf_raw_tp_regs (CVE-2025-38285)

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

    ptp: remove ptp->n_vclocks check logic in ptp_vclock_in_use() (CVE-2025-38305)

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

    fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (CVE-2025-38312)

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

    arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth() (CVE-2025-38320)

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

    mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). (CVE-2025-38324)

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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1080 advisory.

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

    eth: bnxt: fix out-of-range access of vnic_info array (CVE-2025-22112)

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

    wifi: cfg80211: init wiphy_work before allocating rfkill fails (CVE-2025-22119)

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

    block: fix adding folio to bio (CVE-2025-22122)

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

    wifi: ath12k: Clear affinity hint before calling ath12k_pci_free_irq() in error path (CVE-2025-22128)

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

    cpufreq/amd-pstate: Add missing NULL ptr check in amd_pstate_update (CVE-2025-23137)

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

    net_sched: hfsc: Address reentrant enqueue adding class to eltree twice (CVE-2025-38001)

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

    gpio: virtuser: fix potential out-of-bound write (CVE-2025-38082)

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

    net_sched: prio: fix a race in prio_tune() (CVE-2025-38083)

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

    mm/hugetlb: unshare page tables during VMA split, not before (CVE-2025-38084)

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

    sunrpc: handle SVC_GARBAGE during svc auth processing as auth error (CVE-2025-38089)

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

    x86/iopl: Cure TIF_IO_BITMAP inconsistencies (CVE-2025-38100)

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

    io_uring: fix use-after-free of sq->thread in __io_uring_show_fdinfo() (CVE-2025-38106)

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

    net_sched: ets: fix a race in ets_qdisc_change() (CVE-2025-38107)

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

    net_sched: red: fix a race in __red_change() (CVE-2025-38108)

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

    net/mdiobus: Fix potential out-of-bounds read/write access (CVE-2025-38111)

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

    net: Fix TOCTOU issue in sk_is_readable() (CVE-2025-38112)

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

    ACPI: CPPC: Fix NULL pointer dereference when nosmp is used (CVE-2025-38113)

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

    net_sched: sch_sfq: fix a potential crash on gso_skb handling (CVE-2025-38115)

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

    net: fix udp gso skb_segment after pull from frag_list (CVE-2025-38124)

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

    page_pool: Fix use-after-free in page_pool_recycle_in_ring (CVE-2025-38129)

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

    usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink() (CVE-2025-38134)

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

    dm: fix dm_blk_report_zones (CVE-2025-38141)

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

    net: openvswitch: Fix the dead loop of MPLS parse (CVE-2025-38146)

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

    calipso: Don't call calipso functions for AF_INET sk. (CVE-2025-38147)

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

    net: phy: clear phydev->devlink when the link is deleted (CVE-2025-38149)

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

    bpf, sockmap: Avoid using sk_socket after free when sending (CVE-2025-38154)

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

    RDMA/mlx5: Fix error flow upon firmware failure for RQ destruction (CVE-2025-38161)

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

    netfilter: nft_set_pipapo: prevent overflow in lookup table allocation (CVE-2025-38162)

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

    arm64/fpsimd: Avoid clobbering kernel FPSIMD state with SMSTOP (CVE-2025-38169)

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

    arm64/fpsimd: Discard stale CPU state when handling SME traps (CVE-2025-38170)

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

    erofs: avoid using multiple devices with different type (CVE-2025-38172)

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

    net: clear the dst when changing skb protocol (CVE-2025-38192)

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

    net_sched: sch_sfq: reject invalid perturb period (CVE-2025-38193)

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

    netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX (CVE-2025-38201)

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

    smb: client: add NULL check in automount_fullpath (CVE-2025-38208)

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

    configfs-tsm-report: Fix NULL dereference of tsm_ops (CVE-2025-38210)

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

    fbdev: Fix do_register_framebuffer to prevent null-ptr-deref in fb_videomode_to_var (CVE-2025-38215)

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

    ext4: only dirty folios when data journaling regular files (CVE-2025-38220)

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

    nfsd: Initialize ssc before laundromat_work to prevent NULL dereference (CVE-2025-38231)

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

    serial: jsm: fix NPE during jsm_uart_port_init (CVE-2025-38265)

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

    net: drv: netdevsim: don't napi_complete() from netpoll (CVE-2025-38270)

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

    bpf: Avoid __bpf_prog_ret0_warn when jit fails (CVE-2025-38280)

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

    bpf: Fix WARN() in get_bpf_raw_tp_regs (CVE-2025-38285)

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

    scsi: smartpqi: Fix smp_processor_id() call trace for preemptible kernels (CVE-2025-38288)

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

    PM: EM: Fix potential division-by-zero error in em_compute_costs() (CVE-2025-38297)

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

    ptp: remove ptp->n_vclocks check logic in ptp_vclock_in_use() (CVE-2025-38305)

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

    fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() (CVE-2025-38312)

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

    arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth() (CVE-2025-38320)

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

    mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu(). (CVE-2025-38324)

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
243500	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1111)	Nessus	Amazon Linux Local Security Checks	high
242163	Photon OS 5.0: Linux PHSA-2025-5.0-0558	Nessus	PhotonOS Local Security Checks	high
241754	Amazon Linux 2 : kernel (ALASKERNEL-5.15-2025-082)	Nessus	Amazon Linux Local Security Checks	medium
241741	Amazon Linux 2023 : bpftool, kernel6.12, kernel6.12-modules-extra (ALAS2023-2025-1080)	Nessus	Amazon Linux Local Security Checks	medium

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