CVE-2026-98907

kernel: btrfs: protect sb_write_pointer() with invalidate lock

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Severity

Moderate

Red Hat Product Security

4.1

CVSS 3.1

Review impact separately from score.

Published · October 23, 2026

Updated · October 27, 2026

Description

A flaw was found in the Linux kernel's Btrfs file system. A race condition exists in the sb_write_pointer() function due to missing locking synchronization when reading superblock metadata from the cache while block size settings are concurrently modified. A local user could exploit this flaw to cause a Denial of Service (DoS) through a system crash.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE-413 · Improper Resource Locking