Red Hat Security Advisory: kernel security update

Fixed packages 160

Vulnerabilities 4

• 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-2025-40096

  drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies

  In the Linux kernel, the following vulnerability has been resolved: drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies When adding dependencies with drm_sched_job_add_dependency(), that function consumes the fence reference both on su…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Oct 30, 2025
• High 7.8
  CVE-2025-68800

  mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats

  In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats Cited commit added a dedicated mutex (instead of RTNL) to protect the multicast route list, so that it will not chan…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jan 13, 2026
• High 7.8
  CVE-2026-23209

  macvlan: fix error recovery in macvlan_common_newlink()

  In the Linux kernel, the following vulnerability has been resolved: macvlan: fix error recovery in macvlan_common_newlink() valis provided a nice repro to crash the kernel: ip link add p1 type veth peer p2 ip link set address 00:00:00:00:00:20 dev p1 ip link …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Feb 14, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2334560
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2407333
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2429065
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2439900
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_6164.json
• 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-2025-40096
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40096
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40096
• article
  https://lore.kernel.org/linux-cve-announce/2025103016-CVE-2025-40096-09cc@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-68800
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-68800
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-68800
• article
  https://lore.kernel.org/linux-cve-announce/2026011307-CVE-2025-68800-39d2@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-23209
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-23209
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-23209
• article
  https://lore.kernel.org/linux-cve-announce/2026021439-CVE-2026-23209-9ad6@gregkh/T