Improper Initialization in Linux kernel - CVE-2026-80729
Published: September 4, 2026
Vulnerability identifier: #VU146937
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-2026-80729
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a kernel warning.
The vulnerability exists due to improper initialization of the xa_state workingset state in __folio_split() when splitting a memcg-charged page-cache folio. A local user can cause a live memcg-charged xa_node to remain unlinked from the mapping's shadow_nodes list_lru to trigger a kernel warning.
The warning is triggered when reclaim walks the list_lru.
Affected software
Linux kernel
How to mitigate CVE-2026-80729
Install security update from vendor's repository.