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High 1 exploited CVE RLSA-2026:13566 4 CVEs

Important: kernel security update

Published May 6, 2026 · Updated May 6, 2026

Summary

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

Security Fix(es):

* 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: Linux kernel: Use-after-free in bonding driver leads to denial of service (CVE-2026-31419)

* 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 1

ReleasePackageFixed in
Rocky Linux · 10 kernel 0:6.12.0-124.55.1.el10_1

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…

    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…

  • High 7.8

    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…

  • High 7.8

    net: bonding: fix use-after-free in bond_xmit_broadcast()

    In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix use-after-free in bond_xmit_broadcast() bond_xmit_broadcast() reuses the original skb for the last slave (determined by bond_is_last_slave()) and clones it for others. Concu…

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2460538
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2454844
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2448745
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2457829