SB2026081631 - Race condition in Linux kernel netfs

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-72355)

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 the netfs subrequest list handling in fs/netfs/read_retry.c and fs/netfs/write_retry.c when walking the subrequest list during read or write retry processing. A local user can trigger concurrent subrequest activity to cause a denial of service.

Exploitation requires concurrent access to the affected netfs retry paths.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5c6ce05e406520290c1d89da97fb3cd70c09137d
• https://git.kernel.org/stable/c/be47c047250671c9225c0319ca4695be9b391c59