#VU98892 Use-after-free in Linux kernel - CVE-2024-49854
Published: October 21, 2024 / Updated: May 12, 2025
Vulnerability identifier: #VU98892
Vulnerability risk: Low
CVSSv4.0: 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-2024-49854
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
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_prepare_request() and bfq_init_rq() functions in block/bfq-iosched.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/63a07379fdb6c72450cb05294461c6016b8b7726
- https://git.kernel.org/stable/c/de0456460f2abf921e356ed2bd8da87a376680bd
- https://git.kernel.org/stable/c/0780451f03bf518bc032a7c584de8f92e2d39d7f
- https://git.kernel.org/stable/c/0b8bda0ff17156cd3f60944527c9d8c9f99f1583
- https://git.kernel.org/stable/c/cae58d19121a70329cf971359e2518c93fec04fe
- https://git.kernel.org/stable/c/1ba0403ac6447f2d63914fb760c44a3b19c44eaf
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.168
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.113
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11.2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.54