SB2022111444 - Denial of service in Linux kernel rmap
Published: November 14, 2022 Updated: June 7, 2024
Security Bulletin ID
SB2022111444
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-42703)
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 update from vendor's website.
References
- 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