SB20260527105 - Out-of-bounds read in Linux kernel ext4
Published: May 27, 2026
Security Bulletin ID
SB20260527105
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) Out-of-bounds read (CVE-ID: CVE-2026-46094)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in check_xattrs() when processing crafted ext4 extended attribute entries. A local attacker can provide a malformed xattr layout to trigger a read beyond the valid xattr region to disclose sensitive information.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/520986722dbf869c122252123fc161c7302eab7d
- https://git.kernel.org/stable/c/537e065977022aa22f2c2503e8accaf16622e0fd
- https://git.kernel.org/stable/c/5a5314d2387633a272a04d1bd8727f99058e4e68
- https://git.kernel.org/stable/c/ab6da97bc310db35d4e4ef5354bc3ff626b0698c
- https://git.kernel.org/stable/c/eceafc31ea7b42c984ece10d79d505c0bb6615d5