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.
Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4379-1 | linux-6.1 security update |
Debian DLA |
DLA-4404-1 | linux security update |
Debian DSA |
DSA-6053-1 | linux security update |
Ubuntu USN |
USN-7907-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7907-2 | Linux kernel (FIPS) vulnerabilities |
Ubuntu USN |
USN-7907-3 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7907-4 | Linux kernel (GCP FIPS) vulnerabilities |
Ubuntu USN |
USN-7921-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7922-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7922-2 | Linux kernel (FIPS) vulnerabilities |
Ubuntu USN |
USN-7928-1 | Linux kernel vulnerabilities |
Ubuntu USN |
USN-7928-2 | Linux kernel (FIPS) vulnerabilities |
Ubuntu USN |
USN-7928-3 | Linux kernel (Real-time) vulnerabilities |
Ubuntu USN |
USN-7907-5 | Linux kernel kernel vulnerabilities |
Ubuntu USN |
USN-7931-3 | Linux kernel (Real-time) vulnerabilities |
Ubuntu USN |
USN-7934-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7935-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7936-1 | Linux kernel (OEM) vulnerabilities |
Ubuntu USN |
USN-7937-1 | Linux kernel (Azure FIPS) vulnerabilities |
Ubuntu USN |
USN-7938-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7939-1 | Linux kernel (Azure) vulnerabilities |
Ubuntu USN |
USN-7939-2 | Linux kernel (Azure FIPS) vulnerabilities |
Ubuntu USN |
USN-7940-1 | Linux kernel (Azure FIPS) vulnerabilities |
Ubuntu USN |
USN-7921-2 | Linux kernel (Real-time) vulnerabilities |
Ubuntu USN |
USN-7922-3 | Linux kernel (Oracle) vulnerabilities |
Ubuntu USN |
USN-7928-4 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-7931-4 | Linux kernel (Xilinx) vulnerabilities |
Ubuntu USN |
USN-7922-4 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-7928-5 | Linux kernel (KVM) vulnerabilities |
Ubuntu USN |
USN-7931-5 | Linux kernel (Raspberry Pi) vulnerabilities |
Ubuntu USN |
USN-7940-2 | Linux kernel (Azure, N-Series) vulnerabilities |
Ubuntu USN |
USN-7922-5 | Linux kernel (IoT) vulnerabilities |
Tue, 03 Feb 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | NVD-CWE-noinfo | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:* |
|
| Metrics |
cvssV3_1
|
cvssV3_1
|
Mon, 20 Oct 2025 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Linux
Linux linux Kernel |
|
| Vendors & Products |
Linux
Linux linux Kernel |
Tue, 14 Oct 2025 12:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|
Mon, 13 Oct 2025 14:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg | |
| References |
|
|
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-05-11T21:39:49.992Z
Reserved: 2025-04-16T07:20:57.149Z
Link: CVE-2025-39964
No data.
Status : Analyzed
Published: 2025-10-13T14:15:34.737
Modified: 2026-02-26T23:05:10.840
Link: CVE-2025-39964
OpenCVE Enrichment
Updated: 2025-10-20T16:13:28Z
Debian DLA
Debian DSA
Ubuntu USN