CVE-2026-74399

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

evm: terminate and bound the evm_xattrs read buffer

evm_read_xattrs() allocates size + 1 bytes, fills them from the list of

enabled xattrs, and then passes strlen(temp) to

simple_read_from_buffer(). When no configured xattrs are enabled, the

fill loop stores nothing and temp[0] remains uninitialized, so strlen()

reads beyond initialized memory.

Explicitly terminate the buffer after allocation, use snprintf() for

each formatted line, and pass the accumulated length, without risk of

truncation, to simple_read_from_buffer().

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References