#VU69297 Use-after-free in Linux kernel - CVE-2022-42703
Published: November 14, 2022 / Updated: June 7, 2024
Vulnerability identifier: #VU69297
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2022-42703
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the mm/rmap.c in the Linux kernel, related to leaf anon_vma double reuse. A local user can trigger a use-after-free error and crash the kernel.
Remediation
Install updates from vendor's website.
External links
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2351
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2555283eb40df89945557273121e9393ef9b542b
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.7
- https://github.com/torvalds/linux/commit/2555283eb40df89945557273121e9393ef9b542b