Improper input validation in Linux kernel - CVE-2026-98057
Published: September 28, 2026
Vulnerability identifier: #VU152417
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98057
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause persistent ring buffer validation to accept an inconsistent sub-buffer count.
The vulnerability exists due to improper input validation in the persistent ring buffer validation code when validating saved persistent ring buffer metadata. A local user can trigger validation of saved metadata with an nr_subbufs value that does not match nr_pages + 1 to cause persistent ring buffer validation to accept an inconsistent sub-buffer count.
Affected software
Linux kernel
How to mitigate CVE-2026-98057
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3