SB2026091987 - Race condition in Linux kernel ntfs

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-90131)

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

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to observe torn NTFS attribute length and offset fields.

The vulnerability exists due to a race condition in ntfs_read_iomap_begin_resident() when processing mmap read faults for resident NTFS files concurrently with link or unlink operations. A local user can trigger concurrent mmap read faults and link or unlink operations to observe torn NTFS attribute length and offset fields.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0400e0d50eb3be19c98323faa322b652e4ae3f99
• https://git.kernel.org/stable/c/d9e00c457d4ab8ab59c6e4b8554c921260e4e16c