Use-after-free in Linux kernel - CVE-2026-53046
Published: June 25, 2026
Vulnerability identifier: #VU135298
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-53046
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to use-after-free in ksmbd_crypt_message() when handling SMB encryption requests with an asynchronous hardware crypto engine. A remote user can send a crafted SMB request to cause a denial of service.
Exploitation requires the ksmbd server to use an asynchronous crypto engine such as the Qualcomm Crypto Engine.
How to mitigate CVE-2026-53046
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/3e298897f41c61450c2e7a4f457e8b2485eb35b3
- https://git.kernel.org/stable/c/57b47231055b431ed0a1a55f33cac32981564405
- https://git.kernel.org/stable/c/7164b3953cefd540e7ebca828c793bc6869cfbc4
- https://git.kernel.org/stable/c/8ef183216feaa24b66b940510d8b68f680eb56e9
- https://git.kernel.org/stable/c/8fcefe840fa8c14ce667768e5b043286ac3bbcbe
- https://git.kernel.org/stable/c/b46aa129fa2807bfe1545fe74d9295d53c51520b
- https://git.kernel.org/stable/c/cc2da381875d4a67026e4c8feb3dba51a2a2d1bc