Use-after-free in Linux kernel - CVE-2023-54193
Published: December 30, 2025 / Updated: December 31, 2025
Vulnerability identifier: #VU120725
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-2023-54193
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 tcf_block_bind() function in net/sched/cls_api.c. A local user can escalate privileges on the system.
Affected software
Linux kernel
How to mitigate CVE-2023-54193
Install update from vendor's repository.
Linux kernel - addressed in versions 5.4.243, 5.10.180, 5.15.112, 6.1.29, 6.2.16, 6.3.3, 6.4
External References
- https://git.kernel.org/stable/c/26aec72429a05e917d574eca0efc5306c63a8862
- https://git.kernel.org/stable/c/55866fe3fded3ce94ac3fc1bb3dfce654282f483
- https://git.kernel.org/stable/c/7311c8be3755611bf6edea4dfbeb190b4bdd489f
- https://git.kernel.org/stable/c/7b7a74ed303d532fb73ae4b1697f16a0fea89cd0
- https://git.kernel.org/stable/c/cb145932fcf6814e7e95e467eb70e7849a845ae9
- https://git.kernel.org/stable/c/cc5fe387c6294d0471cb7ed064efac97fac65ccc
- https://git.kernel.org/stable/c/da94a7781fc3c92e7df7832bc2746f4d39bc624e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.180
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.112
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.243
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.29
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4