Red Hat Security Advisory: kernel security update

Fixed packages 44

Vulnerabilities 1

• High 7.1
  CVE-2026-46243 Public exploit

  smb: client: reject userspace cifs.spnego descriptions

  In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as ke…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 1, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2481486
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_23395.json
• report
  https://access.redhat.com/security/cve/CVE-2026-46243
• article
  https://access.redhat.com/security/vulnerabilities/RHSB-2026-005
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46243
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46243
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3da1fdf4efbc490041eb4f836bf596201203f8f2
• article
  https://lore.kernel.org/linux-cve-announce/2026060140-CVE-2026-46243-3d1c@gregkh/