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Critical RHSA-2026:36531 3 CVEs

Red Hat Security Advisory: kpatch-patch-4_18_0-477_107_1, kpatch-patch-4_18_0-477_120_1, kpatch-patch-4_18_0-477_130_1, and kpatch-patch-4_18_0-477_97_1 security update

Published Jul 8, 2026 · Updated Oct 17, 2026

Ecosystem: Red Hat

Fixed packages 12

ReleasePackageFixed in
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_107_1 0:1-9.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_107_1-debuginfo 0:1-9.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_107_1-debugsource 0:1-9.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_120_1 0:1-8.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_120_1-debuginfo 0:1-8.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_120_1-debugsource 0:1-8.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_130_1 0:1-6.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_130_1-debuginfo 0:1-6.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_130_1-debugsource 0:1-6.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_97_1 0:1-13.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_97_1-debuginfo 0:1-13.el8_8
Red Hat · RHEL 8.8 E4S rhel_e4s:8.8::baseos kpatch-patch-4_18_0-477_97_1-debugsource 0:1-13.el8_8

Vulnerabilities 3

  • 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 8.1
    CVE-2026-23401

    KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE When installing an emulated MMIO SPTE, do so *after* dropping/zapping the existing SPTE (if it's shadow-present). …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-31419

    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…

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

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2453803
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2454844
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2457829
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_36531.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-23401
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23401
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23401
  • article
    https://lore.kernel.org/linux-cve-announce/2026040108-CVE-2026-23401-956d@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-31402
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-31402
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-31402
  • article
    https://lore.kernel.org/linux-cve-announce/2026040327-CVE-2026-31402-3e6a@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-31419
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-31419
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-31419
  • article
    https://lore.kernel.org/linux-cve-announce/2026041353-CVE-2026-31419-e176@gregkh/T