Red Hat Security Advisory: kernel security update

Fixed packages 158

Vulnerabilities 3

• High 8.1
  CVE-2025-40168

  smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().

  In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UA…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Nov 12, 2025
• High 7.5
  CVE-2025-71085

  ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()

  In the Linux kernel, the following vulnerability has been resolved: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() There exists a kernel oops caused by a BUG_ON(nhead < 0) at net/core/skbuff.c:2232 in pskb_expand_head(). This bug is tri…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jan 13, 2026
• Unscored —
  CVE-2026-23097

  migrate: correct lock ordering for hugetlb file folios

  In the Linux kernel, the following vulnerability has been resolved: migrate: correct lock ordering for hugetlb file folios Syzbot has found a deadlock (analyzed by Lance Yang): 1) Task (5749): Holds folio_lock, then tries to acquire i_mmap_rwsem(read lock). 2…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Feb 4, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2414482
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2429026
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2436802
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_3488.json
• report
  https://access.redhat.com/security/cve/CVE-2025-40168
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40168
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40168
• article
  https://lore.kernel.org/linux-cve-announce/2025111256-CVE-2025-40168-bdd5@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-71085
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-71085
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-71085
• article
  https://lore.kernel.org/linux-cve-announce/2026011340-CVE-2025-71085-e6c1@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-23097
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-23097
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-23097
• article
  https://kernelcve.org/list/?q=CVE-2026-23097
• article
  https://lore.kernel.org/linux-cve-announce/2026020427-CVE-2026-23097-a591@gregkh/T