SB20260816327 - Out-of-bounds write in Linux kernel ntfs3
Published: August 16, 2026
Security Bulletin ID
SB20260816327
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-72196)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an out-of-bounds write in log_replay() in the ntfs3 filesystem log replay code when mounting a malformed NTFS filesystem image. A local user can supply a crafted log record header with inconsistent lcns_follow values to cause a denial of service.
The issue is triggered on the mount path during the analysis pass.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0f13e823bf86bd1800168ea0bb5bca8b8500a81c
- https://git.kernel.org/stable/c/49c86dae0c0ccb8d98ddcdc46987259389c816dd
- https://git.kernel.org/stable/c/5e7b598660cfa8e5af172cf4c65cffc126333307
- https://git.kernel.org/stable/c/9b3d8cc9d54fcded4de51b2b1026ae7182512077
- https://git.kernel.org/stable/c/9b7c28d8c61bdb041936222a09a708531a1c2921
- https://git.kernel.org/stable/c/d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab