SB2026090440 - Improper Initialization in Linux kernel mm
Published: September 4, 2026
Security Bulletin ID
SB2026090440
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Initialization (CVE-ID: CVE-2026-80729)
CWE-ID: CWE-665 - Improper Initialization
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.