Out-of-bounds write in Linux kernel - CVE-2026-89615
Published: September 12, 2026
Vulnerability identifier: #VU149192
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-2026-89615
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform an out-of-bounds write.
The vulnerability exists due to an out-of-bounds write in the page_lcns[] array handling of the NTFS3 log replay code when processing a crafted log record. A local user can provide a crafted log record with an lcns_follow count that exceeds the target entry's capacity to perform an out-of-bounds write.
Affected software
Linux kernel
How to mitigate CVE-2026-89615
Install security update from vendor's repository.