CVE-2023-46813
HIGH 7.0EPSS 0.7%
An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.
- CVSS v3.1 NVD
- 7.0 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.69% chance of exploitation in the next 30 days, 52nd percentile
- Published
- 2023-10-27
- Updated
- 2026-02-25
Proof-of-concept exploits (1)
- Freax13/cve-2023-46813-poc8★ · 2024-01-07
Security advisories
- 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=63e44bc5204…
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a37cd2a59d0…
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9cb9c45583…
- https://bugzilla.suse.com/show_bug.cgi?id=1212649