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High ALSA-2026:47017 6 CVEs

Important: kernel security, bug fix, and enhancement update

Published Jul 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: net: bridge: use a stable FDB dst snapshot in RCU readers (CVE-2026-46086)
* kernel: ipv6: fix possible UAF in icmpv6_rcv() (CVE-2026-53006)
* kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993)
* kernel: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption (CVE-2026-53281)

Bug Fix(es) and Enhancement(s):

* rxrpc: Address CVE-2026-43500 [almalinux-10.2.z] (JIRA:AlmaLinux-178254)

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 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-debug 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-debug-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-debug-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-debug-devel-matched 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-devel-matched 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-64k-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-abi-stablelists 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-cross-headers 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug-devel-matched 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-debug-uki-virt 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-devel-matched 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-doc 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-headers 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-modules-extra-matched 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-debug 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-debug-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-debug-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-rt-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-tools 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-tools-libs 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-tools-libs-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-uki-virt 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-uki-virt-addons 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-zfcpdump 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-devel 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-devel-matched 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules-core 6.12.0-211.40.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules-extra 6.12.0-211.40.1.el10_2
AlmaLinux · 10 libperf 6.12.0-211.40.1.el10_2
AlmaLinux · 10 perf 6.12.0-211.40.1.el10_2
AlmaLinux · 10 python3-perf 6.12.0-211.40.1.el10_2
AlmaLinux · 10 rtla 6.12.0-211.40.1.el10_2
AlmaLinux · 10 rv 6.12.0-211.40.1.el10_2

Vulnerabilities 6

  • Critical 9.8
    CVE-2026-52993 Public exploit

    tipc: fix double-free in tipc_buf_append()

    In the Linux kernel, the following vulnerability has been resolved: tipc: fix double-free in tipc_buf_append() tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a point…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-53006

    ipv6: fix possible UAF in icmpv6_rcv()

    In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching saddr and daddr before pskb_pull() is problematic since skb->head can change. Remove these temporary variables: - We only access &ipv6_hdr(skb)-…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.8
    CVE-2026-53281

    iommu/vt-d: Avoid NULL pointer dereference or refcount corruption

    In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption Commit 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE") fixed a NULL pointer dereference in an unlikely situ…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-43500 Public exploit EPSS 94%

    rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present

    In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.5
    CVE-2026-31635 Public exploit

    rxrpc: fix oversized RESPONSE authenticator length check

    In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix oversized RESPONSE authenticator length check rxgk_verify_response() decodes auth_len from the packet and is supposed to verify that it fits in the remaining bytes. The existing ch…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-46086

    net: bridge: use a stable FDB dst snapshot in RCU readers

    In the Linux kernel, the following vulnerability has been resolved: net: bridge: use a stable FDB dst snapshot in RCU readers Local FDB entries can be rewritten in place by `fdb_delete_local()`, which updates `f->dst` to another port or to `NULL` while keepin…

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

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-46086
  • report
    https://access.redhat.com/security/cve/CVE-2026-52993
  • report
    https://access.redhat.com/security/cve/CVE-2026-53006
  • report
    https://access.redhat.com/security/cve/CVE-2026-53281
  • report
    https://bugzilla.redhat.com/2481989
  • report
    https://bugzilla.redhat.com/2492363
  • report
    https://bugzilla.redhat.com/2492437
  • report
    https://bugzilla.redhat.com/2493728
  • advisory
    https://errata.almalinux.org/10/ALSA-2026-47017.html
  • report
    https://www.redhat.com/security/data/cve/CVE-2026-31635.html