SB2025100474 - Use-after-free in Linux kernel block
Published: October 4, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100474
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2023-53536)
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.
Remediation
Install update from vendor's website.
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