CVE-2025-39964

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2025-39964
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39964.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-39964
Downstream
Related
Published
2025-10-13T13:48:30.334Z
Modified
2026-03-13T04:07:18.839452Z
Summary
crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg
Details

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

crypto: afalg - Disallow concurrent writes in afalg_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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39964.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Fixed
0f28c4adbc4a97437874c9b669fd7958a8c6d6ce
Fixed
e4c1ec11132ec466f7362a95f36a506ce4dc08c9
Fixed
1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8
Fixed
7c4491b5644e3a3708f3dbd7591be0a570135b84
Fixed
9aee87da5572b3a14075f501752e209801160d3d
Fixed
45bcf60fe49b37daab1acee57b27211ad1574042
Fixed
1b34cbbf4f011a121ef7b2d7d6e6920a036d5285

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39964.json"