CVE-2023-3567

HIGHNVD 7.16.7▼
EchelonGraph scoreMEDIUM confidence

Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2023-07-24. NVD baseline CVSS 7.1; sources differ by 0.4.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

A fix is available — apply it.

A use-after-free flaw was found in vcs_read in drivers/tty/vt/vc_screen.c in vc_screen in the Linux Kernel. This issue may allow an attacker with local user access to cause a system crash or leak internal kernel information.

CVSS v3
7.1
EG Score
6.7(medium)
EPSS
34.3%
KEV
Not listed

Published

July 24, 2023

Last Modified

November 21, 2024

References (26)

Vendor Advisories for CVE-2023-3567(6)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulowlatency-4.4 (4.4.0-168) @ trusty2026-05-24ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.244.250) @ xenial2026-05-24ubuntu
ubuntulinux-virtual (3.13.0.193.203) @ trusty2026-05-24ubuntu
ubuntulinux-tools-kvm (4.4.0.1123.120) @ xenial2026-05-24ubuntu
ubuntulowlatency-4.4 (4.4.0-168) @ xenial2026-05-24ubuntu
redhatkernel-0:4.18.0-553.el8_102024-05-22redhat
redhatkernel-rt-0:4.18.0-553.rt7.342.el8_102024-05-22redhat
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat
redhatkernel-0:4.18.0-477.43.1.el8_82024-01-30redhat
redhatkernel-0:5.14.0-284.48.1.el9_22024-01-25redhat
redhatkernel-0:5.14.0-70.85.1.el9_02024-01-25redhat
redhatkernel-rt-0:5.14.0-70.85.1.rt21.156.el9_02024-01-25redhat
redhatkernel-rt-0:5.14.0-284.48.1.rt14.333.el9_22024-01-25redhat
redhatkernel-0:4.18.0-372.87.1.el8_62024-01-25redhat

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.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(9)

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.

Data Freshness Timeline

(refreshed 10× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 102 total refreshes for this CVE.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
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  11. 2026-07-15 16:56 UTCEPSS rescore
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  13. 2026-07-15 14:49 UTCOSV refresh
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  1. 2026-07-06 16:26 UTCEPSS rescore
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  9. 2026-06-29 14:05 UTCEPSS rescore
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  12. 2026-06-28 04:55 UTCEPSS rescore
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  14. 2026-06-27 15:04 UTCOSV refresh
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  23. 2026-06-22 14:24 UTCEPSS rescore
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  25. 2026-06-21 14:55 UTCEPSS rescore
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  27. 2026-06-21 01:58 UTCEPSS rescore
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  29. 2026-06-19 19:24 UTCEPSS rescore
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  31. 2026-06-18 17:51 UTCEPSS rescore
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  41. 2026-06-12 23:10 UTCEPSS rescore
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  43. 2026-06-10 22:17 UTCEPSS rescore
  44. 2026-06-10 01:17 UTCOSV refresh
  45. 2026-06-08 14:16 UTCEPSS rescore
  46. 2026-06-08 14:16 UTCEPSS rescore
  47. 2026-06-07 15:23 UTCEPSS rescore
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  49. 2026-06-05 22:46 UTCEPSS rescore
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  51. 2026-06-05 06:09 UTCEPSS rescore
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  75. 2026-05-24 20:44 UTCEG score recompute

Frequently asked(5)

What is CVE-2023-3567?
CVE-2023-3567 is a high vulnerability published on July 24, 2023. A use-after-free flaw was found in vcsread in drivers/tty/vt/vcscreen.c in vc_screen in the Linux Kernel. This issue may allow an attacker with local user access to cause a system crash or leak internal kernel information.
When was CVE-2023-3567 disclosed?
CVE-2023-3567 was first published in the National Vulnerability Database on July 24, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-3567 actively exploited?
CVE-2023-3567 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-3567?
CVE-2023-3567 has a CVSS v3 base score of 7.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.7.
How do I remediate CVE-2023-3567?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-3567, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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