SB2026081566 - Out-of-bounds read in Linux kernel integrity evm
Published: August 15, 2026
Security Bulletin ID
SB2026081566
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-2026-74399)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.8 [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]
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in evm_read_xattrs() when reading the list of enabled EVM xattrs. A local user can trigger a read of the xattrs interface to disclose sensitive information.
The issue occurs when no configured xattrs are enabled, leaving the buffer uninitialized before its length is determined.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0b9f8282b40af4a99d6243d2cb939d14ff36b049
- https://git.kernel.org/stable/c/11143a19f5b8dc8f414deab87571134f9f447313
- https://git.kernel.org/stable/c/12ad52dc45a0c8c9d25e85b4a84201de4c5420ed
- https://git.kernel.org/stable/c/38b7d63b23aa9d2ddde7688040e9426d32be4065
- https://git.kernel.org/stable/c/8df81954d22a653a8b01d46692cd56f71137269b
- https://git.kernel.org/stable/c/a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d
- https://git.kernel.org/stable/c/a36cbfb85f26e6c6fb6529b1a364331b94dc88f3