SB20260727266 - Improper input validation in Linux kernel crypto

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-64314)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper input validation in chachapoly_create() in the chacha20poly1305 crypto template when processing a malformed template instantiation with a missing poly1305 argument. A local user can supply a malformed template instantiation to cause a denial of service.

The issue is triggered because an error pointer returned by crypto_attr_alg_name() is passed to strcmp() when the second template argument is missing.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0016d3c21c6ab60a20be7f565cefb5999f3adeb6
• https://git.kernel.org/stable/c/265b861bece38318b8e0fc8fac0643d4ef906d31
• https://git.kernel.org/stable/c/e74df53b36cdc6b6b9e5488ec883d1d55624737f