CVE-2025-39964: Linux Kernel Race Condition Vulnerability
Summary
A race condition vulnerability has been identified in the Linux Kernel, specifically within the AF_ALG socket. This flaw allows for concurrent writes to the same socket, leading to unpredictable data interleaving and internal state inconsistencies.
IFF Assessment
This vulnerability allows for data corruption and potential security bypasses, posing a direct threat to system integrity and stability for defenders.
Severity
CISA KEV: Listed as actively exploited. Federal patch due: September 21, 2026. Known ransomware use: Unknown.
Defender Context
Defenders need to be aware of this Linux Kernel vulnerability and prioritize patching or implementing mitigations as soon as possible. The CISA directive emphasizes risk-based prioritization for security updates, which is crucial given the potential for unpredictable system behavior and data corruption.