Vulnerability in Linux Kernel
CVE-2023-46813
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- bugzilla.suse.com/show_bug.cgi (Issue Tracking)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List)
- cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9 (Patch, Mailing List)
- lists.debian.org/debian-lts-announce/2024/01/msg00005.html (mailing-list)
Frequently asked questions
- What is CVE-2023-46813?
- CVE-2023-46813 is a high-severity vulnerability in Linux Kernel. CVSS score: 7.0/10. Published 2023-10-27.
- How severe is CVE-2023-46813?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2023-46813 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.