CVE-2025-39964: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg
In the Linux kernel, the following vulnerability has been resolved:
crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg
Issuing two writes to the same af_alg socket is bogus as the
data will be interleaved in an unpredictable fashion. Furthermore,
concurrent writes may create inconsistencies in the internal
socket state.
Disallow this by adding a new ctx->write field that indiciates
exclusive ownership for writing.
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cwe · low confidence lookup
CWE-362: Exact CWE lookup
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Exploitation: activeAutomatable: noTechnical Impact: total
CVSS vector scores
1 official score
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CWE-362 · source CWE mapping
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.