CVE-2026-89770
kernel: iomap: don't free integrity payload that doesn't exist
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 11, 2026
Updated · September 29, 2026
Description
A flaw was found in the iomap component of the Linux kernel. This vulnerability occurs when Protection Information (PI) verification is disabled on a block device, causing fs_bio_integrity_alloc to not allocate a bio integrity payload. Subsequently, the iomap_bio_read_folio_range_sync function attempts to free this non-existent payload, leading to a NULL pointer dereference. This could potentially result in a system crash or denial of service.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference