Use-after-free in Linux kernel - CVE-2023-52983
Published: March 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106159
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2023-52983
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the bfq_check_ioprio_change() function in block/bfq-iosched.c, within the __bfq_bic_change_cgroup() function in block/bfq-cgroup.c. A local user can escalate privileges on the system.
How to mitigate CVE-2023-52983
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/511c922c5bf6c8a166bea826e702336bc2424140
- https://git.kernel.org/stable/c/7f77f3dab5066a7c9da73d72d1eee895ff84a8d5
- https://git.kernel.org/stable/c/b600de2d7d3a16f9007fad1bdae82a3951a26af2
- https://git.kernel.org/stable/c/cb1876fc33af26d00efdd473311f1b664c77c44e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.11