Use-after-free in Linux kernel - CVE-2023-53536
Published: October 4, 2025 / Updated: October 27, 2025
Vulnerability identifier: #VU116516
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-53536
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the blk_ksm_crypto_cfg_supported() and blk_ksm_evict_key() functions in block/keyslot-manager.c. A local user can escalate privileges on the system.
Affected software
Linux kernel
How to mitigate CVE-2023-53536
Install update from vendor's repository.
Linux kernel - update to 6.2.15
External References
- https://git.kernel.org/stable/c/5bb4005fb667c6e2188fa87950f8d5faf2994410
- https://git.kernel.org/stable/c/5c62852942667c613de0458fc797c5b8c36112b5
- https://git.kernel.org/stable/c/5c7cb94452901a93e90c2230632e2c12a681bc92
- https://git.kernel.org/stable/c/64ef787bb1588475163069c2e62fdd8f6c27b1f6
- https://git.kernel.org/stable/c/701a8220762ff90615dc91d3543f789391b63298
- https://git.kernel.org/stable/c/809a5be62e92a444a3c3d7b9f438019d0b322f55
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.15