Type Confusion in Linux kernel - CVE-2026-63805
Published: July 21, 2026
Vulnerability identifier: #VU138845
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-63805
CWE-ID: CWE-843
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a type confusion in nx_crypto_ctx_exit in the nx crypto driver when releasing AF_ALG-backed crypto contexts. A local user can trigger the vulnerable cleanup path to cause a denial of service.
The issue can be reached when AF_ALG is used opportunistically during local operations such as closing a socket.
Affected software
Linux kernel
How to mitigate CVE-2026-63805
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3