SB20260816356 - Race condition in Linux kernel proc

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-72175)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in make_uffd_wp_huge_pte() in fs/proc/task_mmu.c when handling PAGEMAP_SCAN write-protection of a present HugeTLB PTE. A local user can trigger the race to cause a denial of service.

The issue can cause hardware Dirty or Accessed updates in the live PTE to be lost.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/04718f7c9290f95385f0dd328758753dc1c36dec
• https://git.kernel.org/stable/c/50a25249a6355db74c2c1b6be541b4caab9f3655
• https://git.kernel.org/stable/c/6b7f774b8882445d9174681747d37c42548686a4
• https://git.kernel.org/stable/c/8e39ed92d7c5c6bfc08dc45153916f49a4e98bab