Incorrect calculation in Linux kernel - CVE-2026-97945
Published: September 28, 2026
Vulnerability identifier: #VU152536
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97945
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause data loss.
The vulnerability exists due to incorrect preservation of the dirty bit in pmd_modify() when changing memory protections on PMD-mapped transparent huge pages. A local user can use MADV_FREE and change memory protections under memory pressure to cause data loss.
NUMA hinting can also trigger the issue.
Affected software
Linux kernel
How to mitigate CVE-2026-97945
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3