SB2023110652 - Privilege escalation in Linux kernel
Published: November 6, 2023 Updated: May 13, 2024
Security Bulletin ID
SB2023110652
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper access control (CVE-ID: CVE-2023-46813)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses. A local user can gain arbitrary write access to kernel memory and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.
References
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9cb9c45583b911e0db71d09caa6b56469eb2bdf
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63e44bc52047f182601e7817da969a105aa1f721
- https://bugzilla.suse.com/show_bug.cgi?id=1212649
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a37cd2a59d0cb270b1bba568fd3a3b8668b9d3ba