Red Hat Security Advisory: kernel security update

Fixed packages 142

Vulnerabilities 5

• Critical 9.8
  CVE-2025-68301

  net: atlantic: fix fragment overflow handling in RX path

  In the Linux kernel, the following vulnerability has been resolved: net: atlantic: fix fragment overflow handling in RX path The atlantic driver can receive packets with more than MAX_SKB_FRAGS (17) fragments when handling large multi-descriptor packets. This…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Dec 16, 2025
• High 7.8
  CVE-2025-38051

  smb: client: Fix use-after-free in cifs_fill_dirent

  In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_fill_dirent There is a race condition in the readdir concurrency process, which may access the rsp buffer after it has been released, triggering the fo…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 18, 2025
• 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-2025-40248

  vsock: Ignore signal/timeout on connect() if already established

  In the Linux kernel, the following vulnerability has been resolved: vsock: Ignore signal/timeout on connect() if already established During connect(), acting on a signal/timeout by disconnecting an already established socket leads to several issues: 1. connec…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Dec 4, 2025
• High 7.8
  CVE-2025-40251

  devlink: rate: Unset parent pointer in devl_rate_nodes_destroy

  In the Linux kernel, the following vulnerability has been resolved: devlink: rate: Unset parent pointer in devl_rate_nodes_destroy The function devl_rate_nodes_destroy is documented to "Unset parent for all rate objects". However, it was only calling the driv…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Dec 4, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2373329
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2407333
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2418872
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2418892
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2422836
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_1879.json
• report
  https://access.redhat.com/security/cve/CVE-2025-38051
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38051
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38051
• article
  https://lore.kernel.org/linux-cve-announce/2025061831-CVE-2025-38051-77da@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-2025-40248
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40248
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40248
• article
  https://lore.kernel.org/linux-cve-announce/2025120430-CVE-2025-40248-506e@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40251
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40251
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40251
• article
  https://lore.kernel.org/linux-cve-announce/2025120431-CVE-2025-40251-7db7@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-68301
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-68301
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-68301
• article
  https://lore.kernel.org/linux-cve-announce/2025121643-CVE-2025-68301-be31@gregkh/T