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.
CVE-2023-46813
“—” beside the score: it is equal to NVD's CVSS score.
Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2023-10-27. NVD baseline CVSS 7.0; sources differ by 0.0.
Also known asEUVD-2023-50979 (ENISA EUVD) · GHSA-w26h-mgrc-mcqq (GitHub Security Advisories)Source: ENISA EUVD
- Public exploit or proof-of-concept code is available
A fix is available — apply it.
- CVSS v3
- 7.0
- EG Score
- 7.0HIGHmedium confidence
- EG Risk
- 48EG Risk 48/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity70% × 45%Impact severity (EG Severity): CVSS 7.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.7%
- EPSS %ILE
- 54th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.0): severity, escalated by confirmed exploitation. This CVE's 7.0 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.0 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.7% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
October 27, 2023
Last Modified
June 17, 2026
References (6)
- MITRE · CVE Programhttps://bugzilla.suse.com/show_bug.cgi?id=1212649Issue Tracking
- MITRE · CVE Programhttps://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9Mailing List · Patch
- MITRE · CVE Programhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63e44bc52047f182601e7817da969a105aa1f721Mailing List · Patch
- MITRE · CVE Programhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a37cd2a59d0cb270b1bba568fd3a3b8668b9d3baMailing List · Patch
- MITRE · CVE Programhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9cb9c45583b911e0db71d09caa6b56469eb2bdfMailing List · Patch
- MITRE · CVE Programhttps://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
Vendor Advisories for CVE-2023-46813(10)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2024:0897Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel security update
- RHSA-2024:0881Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel-rt security update
- RHSA-2024:0724Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel security and bug fix update
- RHSA-2024:0575Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel security and bug fix update
- RHSA-2024:0432Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel security and bug fix update
- RHSA-2024:0431Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel-rt security and bug fix update
- RHSA-2024:0461Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel security update
- RHSA-2024:0448Red Hat Product SecurityHigh
Red Hat Security Advisory: kernel security and bug fix update
- +2 more
Patch Availability(17)
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(5 across 5 ecosystems)
Debian:10(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux-5.10 | 5.10.136-1~deb10u1 ... 5.10.197-1~deb10u1 (11 versions) |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 5.10.103-1 ... 5.10.92-2 (36 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 6.1.27-1 ... 6.1.55-1~bpo11+1 (11 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Additional Vendor Advisories
(8)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
- UbuntuUSN-6533-1HIGH
Linux kernel (OEM) vulnerabilities
- UbuntuUSN-6624-1HIGH
Linux kernel vulnerabilities
- UbuntuUSN-6626-1HIGH
Linux kernel vulnerabilities
- UbuntuUSN-6626-2HIGH
Linux kernel vulnerabilities
- UbuntuUSN-6626-3HIGH
Linux kernel (Azure) vulnerabilities
- UbuntuUSN-6628-1HIGH
Linux kernel (Intel IoTG) vulnerabilities
- UbuntuUSN-6628-2HIGH
Linux kernel (Intel IoTG) vulnerabilities
- UbuntuUSN-6652-1HIGH
Linux kernel (Azure) vulnerabilities
Data Freshness Timeline
(refreshed 10× in last 7d / 40× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 95 of 224 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 5 repeat rows among the latest 100 are merged into the row they repeat. The 129 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.7% · 54th percentile
- 2026-10-28 06:15 UTCEG score recompute
- 2026-10-28 06:15 UTCVendor advisory
- 2026-10-28 06:15 UTCGHSA enrichmentGHSA-w26h-mgrc-mcqq · GitHub severity HIGH · GitHub CVSS 7.0
- 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-25 17:32 UTCEG score recompute
- 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-20 21:58 UTCEG score recompute
- 2026-10-20 21:58 UTCVendor advisory
- 2026-10-20 21:58 UTCGHSA enrichmentGHSA-w26h-mgrc-mcqq · GitHub severity HIGH · GitHub CVSS 7.0
- 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-18 07:47 UTCEG score recompute
- 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.7% · 51st percentile
Show 70 moreShow fewer
- 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-12 18:54 UTCOSV refresh
- 2026-10-12 18:17 UTCEG score recompute
- 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-11 21:42 UTCEG score recompute
- 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-08 17:06 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-30 16:32 UTCEG score recompute
- 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-22 18:08 UTCOSV refresh
- 2026-09-22 14:46 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-21 20:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-17 19:25 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.7% · 51st percentile
- 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-12 14:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-03 14:29 UTCOSV refresh
- 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-09-01 04:35 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-24 14:14 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.7% · 50th percentile
- 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-17 13:45 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-17 03:53 UTCOSV refresh
- 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-10 23:57 UTCEPSS rescoreEPSS 0.7% · 49th percentile
- 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.7% · 49th percentile
Publicly available exploits
(1 reference)Public exploit code is referenced for this CVE (1 GitHub PoC). Defenders should treat patch urgency accordingly.
- Open source ↗GitHub PoCFreax13/cve-2023-46813-pocPublished May 29, 2023
Related CVEs(same vendor)
Same vendor
10 shownredhat:RHSA-2024:0431 · ubuntu:USN-6624-1 · redhat:RHSA-2024:0439
Frequently asked(5)
What is CVE-2023-46813?
When was the CVE record for CVE-2023-46813 published?
Is CVE-2023-46813 actively exploited?
What is the CVSS score of CVE-2023-46813?
How do I remediate CVE-2023-46813?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-46813
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