CVE-2026-74399
Low risk· EPSS 7%Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
In the Linux kernel, evm_read_xattrs() did not initialize the buffer, leading to out-of-bounds read by strlen() when no xattrs are configured. The fix explicitly terminates the buffer, uses snprintf(), and passes the actual length to simple_read_from_buffer().
Risk Assessment
The vulnerability may lead to information disclosure from kernel memory or system crash.
Recommendation
Install the Linux kernel update containing the fix for CVE-2026-74399.
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Original NVD description (English source)
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().