SB2026062524 - Out-of-bounds write in Linux kernel omfs
Published: June 25, 2026
Security Bulletin ID
SB2026062524
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-2026-53130)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to overwrite kernel memory.
The vulnerability exists due to an out-of-bounds write in omfs_make_empty() when processing a crafted OMFS filesystem image with s_sys_blocksize smaller than OMFS_DIR_START. A local user can mount a specially crafted filesystem image to overwrite kernel memory.
The issue is caused by an unsigned underflow in the length argument passed to memset().
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0621c385fda1376e967f37ccd534c26c3e511d14
- https://git.kernel.org/stable/c/131ea3e57fc22936ed0e2c8330f2e36106172f51
- https://git.kernel.org/stable/c/5822a05a841a10794ad818620dd2af490b0705d3
- https://git.kernel.org/stable/c/6561afc38398e3518a29c5eebb975c30468f98a6
- https://git.kernel.org/stable/c/754ff1bea3819a90c6f33cccfc1a299ef7609f07
- https://git.kernel.org/stable/c/79f84af38c9fef9deb0e02c79eb969b5541c2644
- https://git.kernel.org/stable/c/817f16ed62bc58a168417bfb5e859c2a370bab03
- https://git.kernel.org/stable/c/fbc72f5c645155dc2ed3573243ed20f9913e3a54