CVE-2023-46813: linux linux_kernel
Vulnerability summary
CVE-2023-46813 is a high (CVSS 7.0) vulnerability in linux linux_kernel. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 54.4% of scored vulnerabilities.
Not severe (CVSS 7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 33 · Related 21Timeline
- 27-10-2023PublishedVulnerability first disclosed.
- 25-02-2026Last modifiedVulnerability information updated.
Description
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 metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.73%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
Increase +0.04 pp
From 0.69% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu102 products
- linux< 5.15.0-94.104
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1053.58
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.1.64-1 | < 6.5.10-1
Linux1 product
- linux_kernel< 6.5.9
Opensuse1 product
- kernel-source&distro=openSUSE Tumbleweed< 6.6.1-1.1
4 vendors · 105 products
References
22 links- bugzilla.suse.com/show_bug.cgi?id=1212649Issue Tracking
