Red Hat Security Advisory: kernel security update

Fixed packages 160

Vulnerabilities 3

• High 8.2
  CVE-2025-37749

  net: ppp: Add bound checking for skb data on ppp_sync_txmung

  In the Linux kernel, the following vulnerability has been resolved: net: ppp: Add bound checking for skb data on ppp_sync_txmung Ensure we have enough data in linear buffer from skb before accessing initial bytes. This prevents potential out-of-bounds accesse…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 1, 2025
• High 7.8
  CVE-2025-21756 Public exploit

  vsock: Keep the binding until socket destruction

  In the Linux kernel, the following vulnerability has been resolved: vsock: Keep the binding until socket destruction Preserve sockets bindings; this includes both resulting from an explicit bind() and those implicitly bound through autobind during connect(). …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Feb 27, 2025
• High 7.8
  CVE-2025-21966

  dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature

  In the Linux kernel, the following vulnerability has been resolved: dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature Fix memory corruption due to incorrect parameter being passed to bio_init

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Apr 1, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2348609
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2356605
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2363332
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_7903.json
• report
  https://access.redhat.com/security/cve/CVE-2025-21756
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-21756
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-21756
• article
  https://lore.kernel.org/linux-cve-announce/2025022603-CVE-2025-21756-5e09@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-21966
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-21966
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-21966
• article
  https://lore.kernel.org/linux-cve-announce/2025040145-CVE-2025-21966-afc6@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-37749
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-37749
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-37749
• article
  https://lore.kernel.org/linux-cve-announce/2025050136-CVE-2025-37749-0f49@gregkh/T