Use-after-free in Linux kernel - CVE-2026-97943
Published: September 28, 2026
Vulnerability identifier: #VU152534
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97943
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free in kernel page tables.
The vulnerability exists due to a use-after-free in cpa_collapse_large_pages when collapsing kernel page table entries. A local user can race a CPA collapse operation with a page-table walk to trigger a use-after-free in kernel page tables.
The affected collapse path is reached only when CPA_COLLAPSE is specified through set_memory_rox().
Affected software
Linux kernel
How to mitigate CVE-2026-97943
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3