SB20260918122 - Out-of-bounds write in Linux kernel hfsplus
Published: September 18, 2026
Security Bulletin ID
SB20260918122
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-93095)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause an out-of-bounds write.
The vulnerability exists due to improper validation of catalog thread records in hfsplus_delete_cat() when rebuilding a catalog key from a corrupted HFS+ image. A local user can supply a corrupted HFS+ image with an oversized thread name length to cause an out-of-bounds write.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/33cda0036bc683fc888c20b04a5fc030e3e8413b
- https://git.kernel.org/stable/c/473ea7aa35615829f0de7a71e8691d69dc24e328
- https://git.kernel.org/stable/c/7898beee166c1145c0bca364d687b8437435bf1a
- https://git.kernel.org/stable/c/af48abc1b00d865c3f4c4d76b901c44115cb7162
- https://git.kernel.org/stable/c/b9729c51a8b67f8b20b8a8cf395da4be63a0c15b
- https://git.kernel.org/stable/c/e20f3b749ad241df77ec1c3e13a9c22209aa1eb3
- https://git.kernel.org/stable/c/e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20
- https://git.kernel.org/stable/c/e31985c67ba00a59d9b1340af473c1dbe6c87856