Red Hat Security Advisory: kernel security update

Fixed packages 91

Vulnerabilities 3

• Critical 9.8
  CVE-2024-56645

  can: j1939: j1939_session_new(): fix skb reference counting

  In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_session_new(): fix skb reference counting Since j1939_session_skb_queue() does an extra skb_get() for each new skb, do the same for the initial one in j1939_session_new() to…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Dec 27, 2024
• High 7.8
  CVE-2024-56603

  net: af_can: do not leave a dangling sk pointer in can_create()

  In the Linux kernel, the following vulnerability has been resolved: net: af_can: do not leave a dangling sk pointer in can_create() On error can_create() frees the allocated sk object, but sock_init_data() has already attached it to the provided sock object. …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Dec 27, 2024
• 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=2334439
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2334560
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2481486
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25908.json
• report
  https://access.redhat.com/security/cve/CVE-2024-56603
• advisory
  https://www.cve.org/CVERecord?id=CVE-2024-56603
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2024-56603
• article
  https://lore.kernel.org/linux-cve-announce/2024122703-CVE-2024-56603-3db8@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2024-56645
• advisory
  https://www.cve.org/CVERecord?id=CVE-2024-56645
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2024-56645
• article
  https://lore.kernel.org/linux-cve-announce/2024122738-CVE-2024-56645-bc11@gregkh/T
• 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/