CVE-2023-6531

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2024-01-21. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: None knownExposed: 0

A fix is available — apply it.

A use-after-free flaw was found in the Linux Kernel due to a race problem in the unix garbage collector's deletion of SKB races with unix_stream_read_generic() on the socket that the SKB is queued on.

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity70% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

January 21, 2024

Last Modified

August 6, 2026

Advisory Details (6)

Auto-updated Aug 6, 2026
Patch available. Sources: redhat.
generic

[PATCH RESEND] io_uring/af_unix: disable sending io_uring over sockets - Pavel Begunkov

https://lore.kernel.org/all/c716c88321939156909cfa1bd8b0faaf1c804103.1701868795.git.asml.silence@gmail.com/
generic Patch Available

[SECURITY] [DLA 3711-1] linux-5.10 security update

https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
redhat Patch Available

2253034 – (CVE-2023-6531) CVE-2023-6531 kernel: GC's deletion of an SKB races with unix_stream_read_generic() leading to UAF

Affected: Red Hat Enterprise Linux 9

https://bugzilla.redhat.com/show_bug.cgi?id=2253034
redhat Patch Available

CVE-2023-6531 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 is not affected by this vulnerability.

https://access.redhat.com/security/cve/CVE-2023-6531
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2024:2394
generic

Packet Storm Security

http://packetstormsecurity.com/files/176533/Linux-Broken-Unix-GC-Interaction-Use-After-Free.html

Vendor Advisories for CVE-2023-6531(1)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-22.04-edge (6.5.0.17.19) @ mantic2026-05-24ubuntu
ubuntulinux-tools-oem-22.04c (6.1.0.1033.34) @ jammy2026-05-24ubuntu
ubuntulinux-tools-azure (6.5.0.1015.17) @ mantic2026-05-24ubuntu
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat

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)
PackageVulnerable rangeFixed inDependents
linux-5.105.10.136-1~deb10u1 ... 5.10.197-1~deb10u1 (11 versions)5.10.205-2~deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (36 versions)5.10.205-2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.27-1 ... 6.1.69-1~bpo11+1 (15 versions)6.1.69-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.6.8-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.6.8-1—

Weakness Classification(2)

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

Additional Vendor Advisories

(4)

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 6× in last 7d / 28× 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 150 total refreshes for this CVE.

  1. 2026-09-07 15:59 UTCEPSS rescore
  2. 2026-09-06 13:46 UTCEPSS rescore
  3. 2026-09-05 15:26 UTCEPSS rescore
  4. 2026-09-04 13:58 UTCEPSS rescore
  5. 2026-09-04 05:04 UTCEPSS rescore
  6. 2026-09-02 14:10 UTCEPSS rescore
  7. 2026-09-01 13:52 UTCEPSS rescore
  8. 2026-09-01 04:36 UTCEPSS rescore
  9. 2026-08-30 19:15 UTCEPSS rescore
  10. 2026-08-30 01:20 UTCEPSS rescore
  11. 2026-08-28 21:39 UTCEPSS rescore
  12. 2026-08-27 14:23 UTCEPSS rescore
  13. 2026-08-26 14:44 UTCEPSS rescore
  14. 2026-08-25 13:47 UTCEPSS rescore
  15. 2026-08-23 00:17 UTCEPSS rescore
  16. 2026-08-23 00:17 UTCEPSS rescore
  17. 2026-08-22 18:37 UTCOSV refresh
  18. 2026-08-21 23:47 UTCEPSS rescore
  19. 2026-08-20 22:53 UTCEPSS rescore
  20. 2026-08-19 17:02 UTCEPSS rescore
  21. 2026-08-18 13:46 UTCEPSS rescore
  22. 2026-08-16 14:54 UTCEPSS rescore
  23. 2026-08-16 02:12 UTCEPSS rescore
  24. 2026-08-15 01:28 UTCEPSS rescore
  25. 2026-08-13 21:58 UTCEPSS rescore
Show 75 more
  1. 2026-08-12 13:49 UTCEPSS rescore
  2. 2026-08-11 13:40 UTCEPSS rescore
  3. 2026-08-10 23:58 UTCEPSS rescore
  4. 2026-08-09 13:44 UTCEPSS rescore
  5. 2026-08-08 16:35 UTCEPSS rescore
  6. 2026-08-07 16:25 UTCEPSS rescore
  7. 2026-08-06 22:47 UTCEG score recompute
  8. 2026-08-06 22:47 UTCVendor advisory
  9. 2026-08-06 22:47 UTCGHSA enrichment
  10. 2026-08-06 13:45 UTCEPSS rescore
  11. 2026-08-05 19:15 UTCEPSS rescore
  12. 2026-08-05 19:15 UTCEPSS rescore
  13. 2026-08-04 10:36 UTCEPSS rescore
  14. 2026-08-03 10:34 UTCEPSS rescore
  15. 2026-08-02 02:25 UTCEPSS rescore
  16. 2026-08-02 02:25 UTCEPSS rescore
  17. 2026-08-01 14:36 UTCOSV refresh
  18. 2026-07-30 16:26 UTCEPSS rescore
  19. 2026-07-30 01:29 UTCEPSS rescore
  20. 2026-07-28 15:34 UTCEPSS rescore
  21. 2026-07-28 15:34 UTCEPSS rescore
  22. 2026-07-26 14:53 UTCEPSS rescore
  23. 2026-07-25 14:16 UTCEPSS rescore
  24. 2026-07-24 14:16 UTCEPSS rescore
  25. 2026-07-23 14:16 UTCEPSS rescore
  26. 2026-07-23 02:30 UTCEG score recompute
  27. 2026-07-22 23:17 UTCEG score recompute
  28. 2026-07-22 14:07 UTCEPSS rescore
  29. 2026-07-22 14:07 UTCEPSS rescore
  30. 2026-07-21 15:23 UTCEPSS rescore
  31. 2026-07-20 17:06 UTCEPSS rescore
  32. 2026-07-19 14:30 UTCEPSS rescore
  33. 2026-07-19 14:29 UTCEPSS rescore
  34. 2026-07-19 02:27 UTCEPSS rescore
  35. 2026-07-19 02:27 UTCEPSS rescore
  36. 2026-07-18 10:03 UTCEPSS rescore
  37. 2026-07-18 10:03 UTCEPSS rescore
  38. 2026-07-16 17:01 UTCEPSS rescore
  39. 2026-07-15 16:56 UTCEPSS rescore
  40. 2026-07-15 01:59 UTCEPSS rescore
  41. 2026-07-15 01:59 UTCEPSS rescore
  42. 2026-07-14 21:55 UTCOSV refresh
  43. 2026-07-13 22:28 UTCEPSS rescore
  44. 2026-07-13 22:28 UTCEPSS rescore
  45. 2026-07-13 06:11 UTCEPSS rescore
  46. 2026-07-12 05:45 UTCEPSS rescore
  47. 2026-07-12 05:45 UTCEPSS rescore
  48. 2026-07-11 08:26 UTCEPSS rescore
  49. 2026-07-09 19:08 UTCEPSS rescore
  50. 2026-07-08 15:13 UTCEPSS rescore
  51. 2026-07-07 13:45 UTCEPSS rescore
  52. 2026-07-07 13:44 UTCEPSS rescore
  53. 2026-07-06 16:26 UTCEPSS rescore
  54. 2026-07-06 16:26 UTCEPSS rescore
  55. 2026-07-06 02:22 UTCEPSS rescore
  56. 2026-07-06 02:22 UTCEPSS rescore
  57. 2026-07-05 02:29 UTCEPSS rescore
  58. 2026-07-04 06:29 UTCEPSS rescore
  59. 2026-07-01 15:05 UTCEPSS rescore
  60. 2026-06-30 23:21 UTCEPSS rescore
  61. 2026-06-30 23:21 UTCEPSS rescore
  62. 2026-06-29 14:05 UTCEPSS rescore
  63. 2026-06-28 14:06 UTCEPSS rescore
  64. 2026-06-28 14:06 UTCEPSS rescore
  65. 2026-06-28 04:55 UTCEPSS rescore
  66. 2026-06-27 03:07 UTCEPSS rescore
  67. 2026-06-26 23:07 UTCOSV refresh
  68. 2026-06-25 13:48 UTCEPSS rescore
  69. 2026-06-25 13:48 UTCEPSS rescore
  70. 2026-06-24 14:04 UTCEPSS rescore
  71. 2026-06-24 14:04 UTCEPSS rescore
  72. 2026-06-23 21:31 UTCEPSS rescore
  73. 2026-06-23 21:31 UTCEPSS rescore
  74. 2026-06-22 14:24 UTCEPSS rescore
  75. 2026-06-22 14:24 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-6531?
CVE-2023-6531 is a high vulnerability published on January 21, 2024. A use-after-free flaw was found in the Linux Kernel due to a race problem in the unix garbage collector's deletion of SKB races with unixstreamread_generic() on the socket that the SKB is queued on.
When was CVE-2023-6531 disclosed?
CVE-2023-6531 was first published in the National Vulnerability Database on January 21, 2024, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-6531 actively exploited?
CVE-2023-6531 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 87.0% of all scored CVEs.
What is the CVSS score of CVE-2023-6531?
CVE-2023-6531 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2023-6531?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-6531, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-6531

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