CVE-2023-2640

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-07-26. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
7.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 16%CVSS: 7.8Exploit: Metasploit · epss top5pct · public exploitExposed: 0

A fix is available — apply it.

On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
61(Track)
EG Risk 61/100SSVC: 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%
Exploitation65% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
16%
EPSS %ILE
97%
KEV
Not listed

Published

July 26, 2023

Last Modified

November 21, 2024

References (8)

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-headers-generic-hwe-22.04 (5.19.0.50.22) @ jammy2026-05-24ubuntu
ubuntulinux-gcp-headers-6.2.0-1010 (6.2.0-1010.10) @ lunar2026-05-24ubuntu
ubuntulinux-modules-6.0.0-1020-oem (6.0.0-1020.20) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oem-22.04c (6.1.0.1019.19) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.177.162) @ jammy2026-05-24ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1111.120~20.04.1) @ focal2026-05-24ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1070 (5.15.0-1070.74) @ jammy2026-05-24ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1100.98) @ jammy2026-05-24ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1106.115~20.04.1) @ focal2026-05-24ubuntu

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.

All Vendor Advisories

(9)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 46× 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.

  1. 2026-07-27 14:10 UTCEPSS rescore
  2. 2026-07-26 14:52 UTCEPSS rescore
  3. 2026-07-26 14:52 UTCEPSS rescore
  4. 2026-07-25 14:16 UTCEPSS rescore
  5. 2026-07-24 14:15 UTCEPSS rescore
  6. 2026-07-23 14:16 UTCEPSS rescore
  7. 2026-07-23 14:16 UTCEPSS rescore
  8. 2026-07-23 02:20 UTCEG score recompute
  9. 2026-07-22 23:08 UTCEG score recompute▼ 1.20
  10. 2026-07-22 14:06 UTCEPSS rescore
  11. 2026-07-22 14:06 UTCEPSS rescore
  12. 2026-07-21 15:23 UTCEPSS rescore
  13. 2026-07-20 17:06 UTCEPSS rescore
  14. 2026-07-19 14:29 UTCEPSS rescore
  15. 2026-07-19 14:29 UTCEPSS rescore
  16. 2026-07-19 02:27 UTCEPSS rescore
  17. 2026-07-19 02:27 UTCEPSS rescore
  18. 2026-07-18 10:03 UTCEPSS rescore
  19. 2026-07-18 10:03 UTCEPSS rescore
  20. 2026-07-16 17:01 UTCEPSS rescore
  21. 2026-07-16 17:01 UTCEPSS rescore
  22. 2026-07-15 16:56 UTCEPSS rescore
  23. 2026-07-15 16:56 UTCEPSS rescore
  24. 2026-07-15 01:58 UTCEPSS rescore
  25. 2026-07-15 01:58 UTCEPSS rescore
Show 66 more
  1. 2026-07-13 22:28 UTCEPSS rescore
  2. 2026-07-13 22:28 UTCEPSS rescore
  3. 2026-07-12 05:45 UTCEPSS rescore
  4. 2026-07-11 08:25 UTCEPSS rescore
  5. 2026-07-11 08:25 UTCEPSS rescore
  6. 2026-07-09 19:08 UTCEPSS rescore
  7. 2026-07-09 19:08 UTCEPSS rescore
  8. 2026-07-08 15:13 UTCEPSS rescore
  9. 2026-07-07 13:44 UTCEPSS rescore
  10. 2026-07-06 16:26 UTCEPSS rescore
  11. 2026-07-06 16:26 UTCEPSS rescore
  12. 2026-07-05 02:28 UTCEPSS rescore
  13. 2026-07-04 06:29 UTCEPSS rescore
  14. 2026-07-02 16:59 UTCEPSS rescore
  15. 2026-07-01 15:04 UTCEPSS rescore
  16. 2026-06-30 23:21 UTCEPSS rescore
  17. 2026-06-30 23:21 UTCEPSS rescore
  18. 2026-06-29 14:05 UTCEPSS rescore
  19. 2026-06-28 14:06 UTCEPSS rescore
  20. 2026-06-28 14:06 UTCEPSS rescore
  21. 2026-06-28 04:54 UTCEPSS rescore
  22. 2026-06-27 03:07 UTCEPSS rescore
  23. 2026-06-25 13:48 UTCEPSS rescore
  24. 2026-06-25 13:48 UTCEPSS rescore
  25. 2026-06-24 14:03 UTCEPSS rescore
  26. 2026-06-24 14:03 UTCEPSS rescore
  27. 2026-06-23 21:31 UTCEPSS rescore
  28. 2026-06-23 21:31 UTCEPSS rescore
  29. 2026-06-22 14:24 UTCEPSS rescore
  30. 2026-06-22 14:24 UTCEPSS rescore
  31. 2026-06-21 14:55 UTCEPSS rescore
  32. 2026-06-21 14:55 UTCEPSS rescore
  33. 2026-06-21 01:58 UTCEPSS rescore
  34. 2026-06-21 01:58 UTCEPSS rescore
  35. 2026-06-19 19:24 UTCEPSS rescore
  36. 2026-06-19 19:24 UTCEPSS rescore
  37. 2026-06-18 17:51 UTCEPSS rescore
  38. 2026-06-18 17:51 UTCEPSS rescore
  39. 2026-06-17 17:51 UTCEPSS rescore
  40. 2026-06-17 17:51 UTCEPSS rescore
  41. 2026-06-16 17:51 UTCEPSS rescore
  42. 2026-06-16 17:51 UTCEPSS rescore
  43. 2026-06-15 17:47 UTCEPSS rescore
  44. 2026-06-12 23:10 UTCEPSS rescore
  45. 2026-06-11 13:59 UTCEPSS rescore
  46. 2026-06-10 13:21 UTCEPSS rescore
  47. 2026-06-10 13:21 UTCEPSS rescore
  48. 2026-06-08 14:15 UTCEPSS rescore
  49. 2026-06-08 14:15 UTCEPSS rescore
  50. 2026-06-06 13:46 UTCEPSS rescore
  51. 2026-06-06 13:46 UTCEPSS rescore
  52. 2026-06-02 20:12 UTCEPSS rescore
  53. 2026-06-02 20:12 UTCEPSS rescore
  54. 2026-06-02 20:12 UTCEPSS rescore
  55. 2026-06-01 13:51 UTCEPSS rescore
  56. 2026-05-29 13:43 UTCEPSS rescore
  57. 2026-05-28 13:43 UTCEPSS rescore
  58. 2026-05-28 13:43 UTCEPSS rescore
  59. 2026-05-26 13:43 UTCEPSS rescore
  60. 2026-05-26 13:43 UTCEPSS rescore
  61. 2026-05-26 07:18 UTCEPSS rescore
  62. 2026-05-26 07:18 UTCEPSS rescore
  63. 2026-05-26 07:17 UTCEPSS rescore
  64. 2026-05-24 20:38 UTCEG score recompute
  65. 2026-05-24 20:38 UTCVendor advisory
  66. 2026-05-24 20:38 UTCGHSA enrichment

Publicly available exploits

(5 references)

Working exploit code is in the public domain (1 Metasploit module) (4 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCmusorblyat/CVE-2023-2640-CVE-2023-32629
    First seen Nov 2, 2023
    Open source ↗
  • GitHub PoCg1vi/CVE-2023-2640-CVE-2023-32629
    First seen Oct 9, 2023

    GameOver(lay) Ubuntu Privilege Escalation

    Open source ↗
  • GitHub PoCluanoliveira350/GameOverlayFS
    First seen Sep 17, 2023

    GameoverlayFS (CVE-2023-2640 and CVE-2023-32629) exploit in Shell Script tested on Ubuntu 20.04 Kernel 5.4.0

    Open source ↗
  • GitHub PoCOllaPapito/gameoverlay
    First seen Aug 15, 2023

    CVE-2023-2640 CVE-2023-32629

    Open source ↗
  • Metasploitexploit/linux/local/gameoverlay_privesc✓ verified
    First seen Jul 26, 2023

    GameOver(lay) Privilege Escalation and Container Escape

    Open source ↗

Frequently asked(5)

What is CVE-2023-2640?
CVE-2023-2640 is a high vulnerability published on July 26, 2023. On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.
When was CVE-2023-2640 disclosed?
CVE-2023-2640 was first published in the National Vulnerability Database on July 26, 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-2023-2640 actively exploited?
CVE-2023-2640 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16% probability of exploitation in the next 30 days, which ranks it in the top 3.4% of all scored CVEs.
What is the CVSS score of CVE-2023-2640?
CVE-2023-2640 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-2640?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-2640, 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

Explore the affected products and dependency analysis for CVE-2023-2640

Explore →

Is Your Infrastructure Affected by CVE-2023-2640?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs