CVE-2023-5633

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-10-24. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

The reference count changes made as part of the CVE-2023-33951 and CVE-2023-33952 fixes exposed a use-after-free flaw in the way memory objects were handled when they were being used to store a surface. When running inside a VMware guest with 3D acceleration enabled, a local, unprivileged user could potentially use this flaw to escalate their privileges.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

October 23, 2023

Last Modified

June 17, 2026

References (16)

Vendor Advisories for CVE-2023-5633(3)

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

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-22.04-edge (6.5.0.13.15) @ mantic2026-05-24ubuntu
ubuntulinux-tools-gcp (6.5.0.1010.10) @ mantic2026-05-24ubuntu
ubuntulinux-tools-azure (6.5.0.1009.11) @ mantic2026-05-24ubuntu
ubuntulinux-tools-oem-22.04c (6.1.0.1035.36) @ jammy2026-05-24ubuntu
redhatkernel-rt-0:5.14.0-284.75.1.rt14.360.el9_22024-07-24redhat
redhatkernel-0:5.14.0-284.75.1.el9_22024-07-24redhat
redhatkernel-0:4.18.0-477.51.1.el8_82024-03-19redhat
redhatkernel-0:5.14.0-362.18.1.el9_32024-01-25redhat
redhatkernel-0:4.18.0-513.11.1.el8_92024-01-10redhat
redhatkernel-rt-0:4.18.0-513.11.1.rt7.313.el8_92024-01-10redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.27-1 ... 6.1.76-1~bpo11+1 (17 versions)6.1.76-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.5.8-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.5.8-1—

Weakness Classification(2)

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

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.

Data Freshness Timeline

(refreshed 8× in last 7d / 41× 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 121 total refreshes for this CVE.

  1. 2026-08-10 23:58 UTCEPSS rescore
  2. 2026-08-09 13:44 UTCEPSS rescore
  3. 2026-08-08 16:35 UTCEPSS rescore
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  12. 2026-08-01 23:06 UTCOSV refresh
  13. 2026-08-01 04:14 UTCEPSS rescore
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  21. 2026-07-23 14:16 UTCEPSS rescore
  22. 2026-07-23 02:30 UTCEG score recompute
  23. 2026-07-22 23:16 UTCEG score recompute
  24. 2026-07-22 14:07 UTCEPSS rescore
  25. 2026-07-22 14:07 UTCEPSS rescore
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  1. 2026-07-21 15:23 UTCEPSS rescore
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  3. 2026-07-19 14:30 UTCEPSS rescore
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  5. 2026-07-19 02:27 UTCEPSS rescore
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  7. 2026-07-18 10:03 UTCEPSS rescore
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  9. 2026-07-16 17:01 UTCEPSS rescore
  10. 2026-07-15 16:56 UTCEPSS rescore
  11. 2026-07-15 06:19 UTCOSV refresh
  12. 2026-07-15 01:59 UTCEPSS rescore
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  14. 2026-07-13 22:28 UTCEPSS rescore
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  21. 2026-07-08 15:13 UTCEPSS rescore
  22. 2026-07-07 13:45 UTCEPSS rescore
  23. 2026-07-07 13:44 UTCEPSS rescore
  24. 2026-07-06 16:26 UTCEPSS rescore
  25. 2026-07-06 16:26 UTCEPSS rescore
  26. 2026-07-06 02:22 UTCEPSS rescore
  27. 2026-07-06 02:22 UTCEPSS rescore
  28. 2026-07-05 02:29 UTCEPSS rescore
  29. 2026-07-04 06:29 UTCEPSS rescore
  30. 2026-07-01 15:05 UTCEPSS rescore
  31. 2026-06-30 23:21 UTCEPSS rescore
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  33. 2026-06-29 14:05 UTCEPSS rescore
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  36. 2026-06-28 04:55 UTCEPSS rescore
  37. 2026-06-27 06:34 UTCOSV refresh
  38. 2026-06-27 03:07 UTCEPSS rescore
  39. 2026-06-25 13:48 UTCEPSS rescore
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  41. 2026-06-24 14:04 UTCEPSS rescore
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  43. 2026-06-23 21:31 UTCEPSS rescore
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  45. 2026-06-22 14:24 UTCEPSS rescore
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  47. 2026-06-21 14:55 UTCEPSS rescore
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  49. 2026-06-21 01:58 UTCEPSS rescore
  50. 2026-06-21 01:58 UTCEPSS rescore
  51. 2026-06-19 19:24 UTCEPSS rescore
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  53. 2026-06-18 17:51 UTCEPSS rescore
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  58. 2026-06-14 23:16 UTCEPSS rescore
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  60. 2026-06-13 22:59 UTCEPSS rescore
  61. 2026-06-12 23:11 UTCEPSS rescore
  62. 2026-06-11 13:59 UTCEPSS rescore
  63. 2026-06-10 22:17 UTCEPSS rescore
  64. 2026-06-10 13:21 UTCEPSS rescore
  65. 2026-06-09 17:17 UTCOSV refresh
  66. 2026-06-08 14:16 UTCEPSS rescore
  67. 2026-06-08 14:16 UTCEPSS rescore
  68. 2026-06-07 15:24 UTCEPSS rescore
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  70. 2026-06-06 13:46 UTCEPSS rescore
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  72. 2026-06-05 22:46 UTCEPSS rescore
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  74. 2026-06-05 06:09 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-5633?
CVE-2023-5633 is a high vulnerability published on October 23, 2023. The reference count changes made as part of the CVE-2023-33951 and CVE-2023-33952 fixes exposed a use-after-free flaw in the way memory objects were handled when they were being used to store a surface. When running inside a VMware guest with 3D acceleration enabled, a local, unprivileged user…
When was CVE-2023-5633 disclosed?
CVE-2023-5633 was first published in the National Vulnerability Database on October 23, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-5633 actively exploited?
CVE-2023-5633 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.6% of all scored CVEs.
What is the CVSS score of CVE-2023-5633?
CVE-2023-5633 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-5633?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-5633, 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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