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High ALSA-2026:91565 16 CVEs

Important: kernel security, bug fix, and enhancement update

Published Oct 28, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236)
* kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388)
* kernel: net: shaper: rework the VALID marking (again) (CVE-2026-64027)
* kernel: net/handshake: hand off the pinned file reference to accept_doit (CVE-2026-63979)
* kernel: net/handshake: Drain pending requests at net namespace exit (CVE-2026-63978)
* kernel: af_unix: Fix UAF read of tail->len in unix_stream_data_wait() (CVE-2026-64109)
* kernel: net/handshake: Take a long-lived file reference at submit (CVE-2026-64523)
* kernel: net: gro: fix double aggregation of flush-marked skbs (CVE-2026-68136)
* kernel: net/packet: avoid fanout hook re-registration after unregister (CVE-2026-68338)
* kernel: scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE (CVE-2026-72083)
* kernel: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled (CVE-2026-74515)
* kernel: net: smc: fix splice entry lifetime imbalance in smc_rx_splice (CVE-2026-74631)
* kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() (CVE-2026-80824)
* kernel: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions (CVE-2026-89638)
* kernel: vfio/pci: clear vdev->msi_perm after freeing it on init failure (CVE-2026-89777)
* kernel: md/raid5-ppl: fix use-after-free in ppl_do_flush() (CVE-2026-93262)

Bug Fix(es) and Enhancement(s):

* x86/microcode: Add platform mask to Intel microcode "old" list [AlmaLinux-10] [almalinux-10.2.z] (JIRA:AlmaLinux-212778)
* net: NULL pointer deref kernel panic in fib6_walk_continue under heavy VRF churn [almalinux-10.2.z] (JIRA:AlmaLinux-245489)
* backport fixes for lockdep issues reported with rt-debug [almalinux-10.2.z] (JIRA:AlmaLinux-259937)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 75

ReleasePackageFixed in
AlmaLinux · 10 kernel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-debug 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-debug-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-debug-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-debug-devel-matched 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-devel-matched 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-64k-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-abi-stablelists 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-cross-headers 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug-devel-matched 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-debug-uki-virt 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-devel-matched 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-doc 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-headers 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-modules-extra-matched 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-debug 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-debug-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-debug-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-rt-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-tools 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-tools-libs 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-tools-libs-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-uki-virt 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-uki-virt-addons 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-zfcpdump 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-devel 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-devel-matched 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules-core 6.12.0-211.69.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules-extra 6.12.0-211.69.1.el10_2
AlmaLinux · 10 libperf 6.12.0-211.69.1.el10_2
AlmaLinux · 10 perf 6.12.0-211.69.1.el10_2
AlmaLinux · 10 python3-perf 6.12.0-211.69.1.el10_2
AlmaLinux · 10 rtla 6.12.0-211.69.1.el10_2
AlmaLinux · 10 rv 6.12.0-211.69.1.el10_2

Vulnerabilities 16

  • Critical 9.8
    CVE-2026-63978

    net/handshake: Drain pending requests at net namespace exit

    In the Linux kernel, the following vulnerability has been resolved: net/handshake: Drain pending requests at net namespace exit The arguments to list_splice_init() in handshake_net_exit() are reversed. The call moves the local empty "requests" list onto hn->h…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Critical 9.8
    CVE-2026-63979

    net/handshake: hand off the pinned file reference to accept_doit

    In the Linux kernel, the following vulnerability has been resolved: net/handshake: hand off the pinned file reference to accept_doit handshake_req_next() removes the request from the per-net pending list and drops hn_lock before handshake_nl_accept_doit() rea…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-64523

    net/handshake: Take a long-lived file reference at submit

    In the Linux kernel, the following vulnerability has been resolved: net/handshake: Take a long-lived file reference at submit handshake_nl_accept_doit() needs the file pointer backing req->hr_sk->sk_socket to survive the window between handshake_req_next() an…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Critical 9.8
    CVE-2026-68136

    net: gro: fix double aggregation of flush-marked skbs

    In the Linux kernel, the following vulnerability has been resolved: net: gro: fix double aggregation of flush-marked skbs Commit 0ab03f353d36 ("net-gro: Fix GRO flush when receiving a GSO packet.") added a flush check to skb_gro_receive(), but skb_gro_receive…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Critical 9.8
    CVE-2026-72083

    scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE

    In the Linux kernel, the following vulnerability has been resolved: scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE core_scsi3_emulate_pro_register_and_move() maps the PERSISTENT RESERVE OUT parameter list with transport_kmap_data_sg() …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.8
    CVE-2026-64109

    af_unix: Fix UAF read of tail->len in unix_stream_data_wait()

    In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix UAF read of tail->len in unix_stream_data_wait() unix_stream_data_wait() does skb_peek_tail(&sk->sk_receive_queue) without holding any lock that prevents SKBs on that queue from …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.8
    CVE-2026-74515

    KVM: s390: pci: Reject adapter interrupt forwarding if already enabled

    In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled The MPCIFC instruction doesn't allow registering adapter interrupts without first unregistering. So reject any request t…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.8
    CVE-2026-89777

    vfio/pci: clear vdev->msi_perm after freeing it on init failure

    In the Linux kernel, the following vulnerability has been resolved: vfio/pci: clear vdev->msi_perm after freeing it on init failure vfio_msi_cap_len() lazily allocates the per-device MSI permission table: vdev->msi_perm = kmalloc_obj(struct perm_bits, GFP_KER…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.4
    CVE-2026-74631

    net: smc: fix splice entry lifetime imbalance in smc_rx_splice

    In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In t…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-53388

    fuse: re-lock request before replacing page cache folio

    In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before replacing page cache folio fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path. This means fuse_chan_abort() can end th…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-64027

    net: shaper: rework the VALID marking (again)

    In the Linux kernel, the following vulnerability has been resolved: net: shaper: rework the VALID marking (again) Recent commit changed the semantics from NOT_VALID to VALID. I didn't realize that the flags are not stored atomically with the entry in XArray. …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-68338

    net/packet: avoid fanout hook re-registration after unregister

    In the Linux kernel, the following vulnerability has been resolved: net/packet: avoid fanout hook re-registration after unregister packet_set_ring() temporarily detaches a socket from packet delivery while reconfiguring its ring. It records the previous runni…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-89638

    smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions

    In the Linux kernel, the following vulnerability has been resolved: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions When a file has the setuid or setgid bit set and is written to, the VFS strips those bits and issues a …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-93262

    md/raid5-ppl: fix use-after-free in ppl_do_flush()

    In the Linux kernel, the following vulnerability has been resolved: md/raid5-ppl: fix use-after-free in ppl_do_flush() The loop in ppl_do_flush() continues iterating after calling ppl_io_unit_finished(), touching io->pending_flushes and leading to a use-after…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-53236

    tcp: restrict SO_ATTACH_FILTER to priv users

    In the Linux kernel, the following vulnerability has been resolved: tcp: restrict SO_ATTACH_FILTER to priv users This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets to users with CAP_NET_ADMIN capability. This blocks potential side-channel …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2026-80824

    usb: usbfs: fix use-after-free of usb_device in usbdev_release()

    In the Linux kernel, the following vulnerability has been resolved: usb: usbfs: fix use-after-free of usb_device in usbdev_release() usbdev_release() drops its reference to the struct usb_device before draining the list of completed async URBs, but that drain…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-53236
  • report
    https://access.redhat.com/security/cve/CVE-2026-53388
  • report
    https://access.redhat.com/security/cve/CVE-2026-63978
  • report
    https://access.redhat.com/security/cve/CVE-2026-63979
  • report
    https://access.redhat.com/security/cve/CVE-2026-64027
  • report
    https://access.redhat.com/security/cve/CVE-2026-64109
  • report
    https://access.redhat.com/security/cve/CVE-2026-64523
  • report
    https://access.redhat.com/security/cve/CVE-2026-68136
  • report
    https://access.redhat.com/security/cve/CVE-2026-68338
  • report
    https://access.redhat.com/security/cve/CVE-2026-72083
  • report
    https://access.redhat.com/security/cve/CVE-2026-74515
  • report
    https://access.redhat.com/security/cve/CVE-2026-74631
  • report
    https://access.redhat.com/security/cve/CVE-2026-80824
  • report
    https://access.redhat.com/security/cve/CVE-2026-89638
  • report
    https://access.redhat.com/security/cve/CVE-2026-89777
  • report
    https://access.redhat.com/security/cve/CVE-2026-93262
  • report
    https://bugzilla.redhat.com/2492709
  • report
    https://bugzilla.redhat.com/2502255
  • report
    https://bugzilla.redhat.com/2502341
  • report
    https://bugzilla.redhat.com/2502376
  • report
    https://bugzilla.redhat.com/2502382
  • report
    https://bugzilla.redhat.com/2502615
  • report
    https://bugzilla.redhat.com/2507122
  • report
    https://bugzilla.redhat.com/2513163
  • report
    https://bugzilla.redhat.com/2513264
  • report
    https://bugzilla.redhat.com/2516579
  • report
    https://bugzilla.redhat.com/2517006
  • report
    https://bugzilla.redhat.com/2521413
  • report
    https://bugzilla.redhat.com/2528642
  • report
    https://bugzilla.redhat.com/2532122
  • report
    https://bugzilla.redhat.com/2535066
  • report
    https://bugzilla.redhat.com/2540323
  • advisory
    https://errata.almalinux.org/10/ALSA-2026-91565.html