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High 1 exploited CVE ALSA-2026:13565 4 CVEs

Important: kernel security update

Published May 4, 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: Linux kernel: Denial of Service in libceph OSD client due to unreset sparse-read state (CVE-2026-23136)
* kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270)
* kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402)
* kernel: crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431)

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 74

ReleasePackageFixed in
AlmaLinux · 9 kernel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-debug 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-debug-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-debug-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-debug-devel-matched 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-debug-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-debug-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-debug-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-devel-matched 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-64k-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-abi-stablelists 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-cross-headers 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug-devel-matched 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-debug-uki-virt 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-devel-matched 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-doc 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-headers 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-debug 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-debug-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-debug-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-debug-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-debug-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-debug-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-64k-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-debug 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-debug-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-debug-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-debug-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-debug-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-debug-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-rt-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-tools 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-tools-libs 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-tools-libs-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-uki-virt 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-uki-virt-addons 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-zfcpdump 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-zfcpdump-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-zfcpdump-devel 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-zfcpdump-devel-matched 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-zfcpdump-modules 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-zfcpdump-modules-core 5.14.0-611.54.1.el9_7
AlmaLinux · 9 kernel-zfcpdump-modules-extra 5.14.0-611.54.1.el9_7
AlmaLinux · 9 libperf 5.14.0-611.54.1.el9_7
AlmaLinux · 9 perf 5.14.0-611.54.1.el9_7
AlmaLinux · 9 python3-perf 5.14.0-611.54.1.el9_7
AlmaLinux · 9 rtla 5.14.0-611.54.1.el9_7
AlmaLinux · 9 rv 5.14.0-611.54.1.el9_7

Vulnerabilities 4

  • High 7.8
    CVE-2026-31431 Exploited Public exploit EPSS 98%

    crypto: algif_aead - Revert to operating out-of-place

    In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux Alpine
    KEV May 1, 2026
  • Critical 9.8
    CVE-2026-31402 Public exploit

    nfsd: fix heap overflow in NFSv4.0 LOCK replay cache

    In the Linux kernel, the following vulnerability has been resolved: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache The NFSv4.0 replay cache uses a fixed 112-byte inline buffer (rp_ibuf[NFSD4_REPLAY_ISIZE]) to store encoded operation responses. This size…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-23270

    net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks

    In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the curren…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.5
    CVE-2026-23136

    libceph: reset sparse-read state in osd_fault()

    In the Linux kernel, the following vulnerability has been resolved: libceph: reset sparse-read state in osd_fault() When a fault occurs, the connection is abandoned, reestablished, and any pending operations are retried. The OSD client tracks the progress of …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-23136
  • report
    https://access.redhat.com/security/cve/CVE-2026-23270
  • report
    https://access.redhat.com/security/cve/CVE-2026-31402
  • report
    https://access.redhat.com/security/cve/CVE-2026-31431
  • report
    https://bugzilla.redhat.com/2439852
  • report
    https://bugzilla.redhat.com/2448745
  • report
    https://bugzilla.redhat.com/2454844
  • report
    https://bugzilla.redhat.com/2460538
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-13565.html