Use-after-free in Linux kernel - CVE-2022-48726
Published: June 20, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92894
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-2022-48726
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 ucma_alloc_ctx(), ucma_cleanup_multicast(), ucma_process_join(), mutex_unlock() and ucma_leave_multicast() functions in drivers/infiniband/core/ucma.c. A local user can escalate privileges on the system.
How to mitigate CVE-2022-48726
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/75c610212b9f1756b9384911d3a2c347eee8031c
- https://git.kernel.org/stable/c/2923948ffe0835f7114e948b35bcc42bc9b3baa1
- https://git.kernel.org/stable/c/ee2477e8ccd3d978eeac0dc5a981b286d9bb7b0a
- https://git.kernel.org/stable/c/36e8169ec973359f671f9ec7213547059cae972e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.99
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17