Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: crypto: chacha20poly1305 - validate poly1305 template argument… (CVE-2026-64314)
A vulnerability in the Linux kernel's cryptographic API related to the chacha20poly1305 cipher was resolved. The issue involved improper validation of the poly1305 template argument in the chachapoly_create() function, which could lead to dereferencing an error pointer in strcmp() when the second template argument was missing. This flaw was fixed by adding proper checks to ensure malformed template instantiations fail safely. The vulnerability affects multiple Linux kernel versions prior to 7.0.0-31.31 and related builds. A patch is available and should be applied. The CVSS score is 5.5, indicating a medium severity impact primarily affecting availability. No known exploits in the wild have been reported.
AI Analysis
Technical Summary
The Linux kernel's crypto subsystem had a vulnerability in the chacha20poly1305 implementation where the chachapoly_create() function assumed the presence of a second template argument and passed it directly to strcmp() without validating it. If this argument was missing, crypto_attr_alg_name() returned an error pointer that was dereferenced, causing a potential crash or denial of service. The fix involves checking the result of crypto_attr_alg_name() before using it in string comparisons, aligning with the Crypto API's template validation pattern. This vulnerability affects Linux kernel versions prior to 7.0.0-31.31 and related variants. The issue has been patched in updated kernel releases.
Potential Impact
This vulnerability can cause a denial of service by crashing the kernel due to dereferencing an error pointer in the cryptographic API. The CVSS score of 5.5 reflects a medium severity with no confidentiality or integrity impact but with potential availability impact. There are no reports of active exploitation in the wild. The flaw could be triggered locally by invoking the affected crypto template with malformed arguments.
Mitigation Recommendations
A patch is available and should be applied by updating to Linux kernel versions 7.0.0-31.31 or later as provided by the vendor. After applying the update, a system reboot is required. Users should follow the vendor's instructions for updating and recompiling any third-party kernel modules due to ABI changes. No additional mitigation is required beyond applying the official fix.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: crypto: chacha20poly1305 - validate poly1305 template argument… (CVE-2026-64314)
Description
A vulnerability in the Linux kernel's cryptographic API related to the chacha20poly1305 cipher was resolved. The issue involved improper validation of the poly1305 template argument in the chachapoly_create() function, which could lead to dereferencing an error pointer in strcmp() when the second template argument was missing. This flaw was fixed by adding proper checks to ensure malformed template instantiations fail safely. The vulnerability affects multiple Linux kernel versions prior to 7.0.0-31.31 and related builds. A patch is available and should be applied. The CVSS score is 5.5, indicating a medium severity impact primarily affecting availability. No known exploits in the wild have been reported.
CVSS v3.1
Score 5.5medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's crypto subsystem had a vulnerability in the chacha20poly1305 implementation where the chachapoly_create() function assumed the presence of a second template argument and passed it directly to strcmp() without validating it. If this argument was missing, crypto_attr_alg_name() returned an error pointer that was dereferenced, causing a potential crash or denial of service. The fix involves checking the result of crypto_attr_alg_name() before using it in string comparisons, aligning with the Crypto API's template validation pattern. This vulnerability affects Linux kernel versions prior to 7.0.0-31.31 and related variants. The issue has been patched in updated kernel releases.
Potential Impact
This vulnerability can cause a denial of service by crashing the kernel due to dereferencing an error pointer in the cryptographic API. The CVSS score of 5.5 reflects a medium severity with no confidentiality or integrity impact but with potential availability impact. There are no reports of active exploitation in the wild. The flaw could be triggered locally by invoking the affected crypto template with malformed arguments.
Mitigation Recommendations
A patch is available and should be applied by updating to Linux kernel versions 7.0.0-31.31 or later as provided by the vendor. After applying the update, a system reboot is required. Users should follow the vendor's instructions for updating and recompiling any third-party kernel modules due to ABI changes. No additional mitigation is required beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-8q9p-r3g4-95mr
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64314"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a65420d9c2644c7f80859e1
Added to database: 07/25/2026, 23:09:01 UTC
Last enriched: 09/07/2026, 18:10:26 UTC
Last updated: 09/08/2026, 22:52:14 UTC
Views: 60
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