Red Hat Security Advisory: kernel security update

Fixed packages 142

Vulnerabilities 9

• Critical 9.4
  CVE-2025-39933

  smb: client: let recv_done verify data_offset, data_length and remaining_data_length

  In the Linux kernel, the following vulnerability has been resolved: smb: client: let recv_done verify data_offset, data_length and remaining_data_length This is inspired by the related server fixes.

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Oct 4, 2025
• High 7.8
  CVE-2025-37882

  usb: xhci: Fix isochronous Ring Underrun/Overrun event handling

  In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix isochronous Ring Underrun/Overrun event handling The TRB pointer of these events points at enqueue at the time of error occurrence on xHCI 1.1+ HCs or it's NULL on older ones. …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 9, 2025
• High 7.8
  CVE-2025-38730

  io_uring/net: commit partial buffers on retry

  In the Linux kernel, the following vulnerability has been resolved: io_uring/net: commit partial buffers on retry Ring provided buffers are potentially only valid within the single execution context in which they were acquired. io_uring deals with this and in…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 4, 2025
• High 7.8
  CVE-2025-40269

  ALSA: usb-audio: Fix potential overflow of PCM transfer buffer

  In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix potential overflow of PCM transfer buffer The PCM stream data in USB-audio driver is transferred over USB URB packet buffers, and each packet size is determined dynamical…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Dec 6, 2025
• High 7.8
  CVE-2025-40271 Public exploit

  fs/proc: fix uaf in proc_readdir_de()

  In the Linux kernel, the following vulnerability has been resolved: fs/proc: fix uaf in proc_readdir_de() Pde is erased from subdir rbtree through rb_erase(), but not set the node to EMPTY, which may result in uaf access. We should use RB_CLEAR_NODE() set the…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Dec 6, 2025
• High 7.8
  CVE-2025-40304

  fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds

  In the Linux kernel, the following vulnerability has been resolved: fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds Add bounds checking to prevent writes past framebuffer boundaries when rendering text near screen edges. Return early if t…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Dec 8, 2025
• High 7.5
  CVE-2025-68349

  NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid

  In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid Fixes a crash when layout is null during this call stack: write_inode -> nfs4_write_inode -> pnfs_layoutcommit_inode…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Dec 24, 2025
• Unscored —
  CVE-2025-38415

  Squashfs: check return result of sb_min_blocksize

  In the Linux kernel, the following vulnerability has been resolved: Squashfs: check return result of sb_min_blocksize Syzkaller reports an "UBSAN: shift-out-of-bounds in squashfs_bio_read" bug. Syzkaller forks multiple processes which after mounting the Squas…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 25, 2025
• Unscored —
  CVE-2025-39760

  usb: core: config: Prevent OOB read in SS endpoint companion parsing

  In the Linux kernel, the following vulnerability has been resolved: usb: core: config: Prevent OOB read in SS endpoint companion parsing usb_parse_ss_endpoint_companion() checks descriptor type before length, enabling a potentially odd read outside of the buf…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2365250
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2383404
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2393191
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2394601
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2401432
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2419837
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2419870
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2419919
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2424880
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_2766.json
• report
  https://access.redhat.com/security/cve/CVE-2025-37882
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-37882
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-37882
• article
  https://lore.kernel.org/linux-cve-announce/2025050944-CVE-2025-37882-db64@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-38415
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38415
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38415
• article
  https://lore.kernel.org/linux-cve-announce/2025072513-CVE-2025-38415-c634@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-38730
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38730
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38730
• article
  https://lore.kernel.org/linux-cve-announce/2025090403-CVE-2025-38730-f2e6@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39760
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39760
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39760
• article
  https://lore.kernel.org/linux-cve-announce/2025091145-CVE-2025-39760-2d5f@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39933
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39933
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39933
• article
  https://lore.kernel.org/linux-cve-announce/2025100417-CVE-2025-39933-e224@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40269
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40269
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40269
• article
  https://lore.kernel.org/linux-cve-announce/2025120716-CVE-2025-40269-9769@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40271
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40271
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40271
• article
  https://lore.kernel.org/linux-cve-announce/2025120716-CVE-2025-40271-7612@gregkh/T