CVE-2026-99087
kernel: dm-integrity: fix NULL pointer dereference when the 'R' flag is used
Severity
ModerateRed Hat Product Security
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 device-mapper integrity (dm-integrity) subsystem. A local user with administrative privileges can cause a Denial of Service (DoS) by activating a storage device in read-only mode when dirty journal bitmap flags are set. This issue occurs because the driver attempts to perform write operations and read journal data on a read-only device during resume, triggering a NULL pointer dereference and crashing the system.
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 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference