CVE-2023-6546

HIGHNVD 7.07.8▲
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-12-21. NVD baseline CVSS 7.0; sources differ by 0.8.

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: 1%CVSS: 7.0Exploit: None knownExposed: 0

A fix is available — apply it.

A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.

CVSS v3
7.0
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
53%
KEV
Not listed

Published

December 21, 2023

Last Modified

August 6, 2026

Advisory Details (10)

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

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2024:1612
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2024:1607
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:1306
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:1253
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:1250
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:1055
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:1019
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:1018
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:0937
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2024:0930

Vendor Advisories for CVE-2023-6546(16)

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
redhatkpatch-patch2024-08-01redhat
redhatkernel-rt-0:4.18.0-305.134.1.rt7.210.el8_42024-07-23redhat
redhatkernel-0:4.18.0-305.134.1.el8_42024-07-23redhat
redhatkernel-0:4.18.0-193.136.1.el8_22024-07-16redhat
redhatopenshift-logging/vector-rhel8:v0.28.1-572024-05-01redhat
redhatkernel-0:4.18.0-477.55.1.el8_82024-04-30redhat
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat
redhatkernel-rt-0:4.18.0-513.24.1.rt7.326.el8_92024-04-02redhat
redhatkernel-0:4.18.0-513.24.1.el8_92024-04-02redhat
redhatkernel-rt-0:5.14.0-70.93.1.rt21.165.el9_02024-03-13redhat
redhatkernel-0:5.14.0-70.93.2.el9_02024-03-12redhat
redhatkernel-0:5.14.0-284.55.1.el9_22024-02-28redhat
redhatkernel-rt-0:5.14.0-284.55.1.rt14.340.el9_22024-02-28redhat
redhatkernel-0:4.18.0-372.93.1.el8_62024-02-21redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (34 versions)5.10.197-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.27-1 ... 6.1.38-4~bpo11+1 (8 versions)6.1.52-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.4.13-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.4.13-1—

Weakness Classification(3)

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 151 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 17:36 UTCOSV refresh
  18. 2026-08-01 04:14 UTCEPSS rescore
  19. 2026-07-30 16:26 UTCEPSS rescore
  20. 2026-07-30 01:29 UTCEPSS rescore
  21. 2026-07-28 15:34 UTCEPSS rescore
  22. 2026-07-28 15:34 UTCEPSS rescore
  23. 2026-07-26 14:53 UTCEPSS rescore
  24. 2026-07-25 14:16 UTCEPSS rescore
  25. 2026-07-24 14:16 UTCEPSS rescore
  26. 2026-07-23 14:16 UTCEPSS rescore
  27. 2026-07-23 02:30 UTCEG score recompute
  28. 2026-07-22 23:17 UTCEG score recompute
  29. 2026-07-22 14:07 UTCEPSS rescore
  30. 2026-07-22 14:07 UTCEPSS rescore
  31. 2026-07-21 15:23 UTCEPSS rescore
  32. 2026-07-20 17:06 UTCEPSS rescore
  33. 2026-07-19 14:30 UTCEPSS rescore
  34. 2026-07-19 14:29 UTCEPSS rescore
  35. 2026-07-19 02:27 UTCEPSS rescore
  36. 2026-07-19 02:27 UTCEPSS rescore
  37. 2026-07-18 10:03 UTCEPSS rescore
  38. 2026-07-18 10:03 UTCEPSS rescore
  39. 2026-07-16 17:01 UTCEPSS rescore
  40. 2026-07-15 16:56 UTCEPSS rescore
  41. 2026-07-15 01:59 UTCEPSS rescore
  42. 2026-07-15 01:59 UTCEPSS rescore
  43. 2026-07-15 00:55 UTCOSV refresh
  44. 2026-07-13 22:28 UTCEPSS rescore
  45. 2026-07-13 22:28 UTCEPSS rescore
  46. 2026-07-13 06:11 UTCEPSS rescore
  47. 2026-07-12 05:45 UTCEPSS rescore
  48. 2026-07-12 05:45 UTCEPSS rescore
  49. 2026-07-11 08:26 UTCEPSS rescore
  50. 2026-07-09 19:08 UTCEPSS rescore
  51. 2026-07-08 15:13 UTCEPSS rescore
  52. 2026-07-07 13:45 UTCEPSS rescore
  53. 2026-07-07 13:44 UTCEPSS rescore
  54. 2026-07-06 16:26 UTCEPSS rescore
  55. 2026-07-06 16:26 UTCEPSS rescore
  56. 2026-07-06 02:22 UTCEPSS rescore
  57. 2026-07-06 02:22 UTCEPSS rescore
  58. 2026-07-05 02:29 UTCEPSS rescore
  59. 2026-07-04 06:29 UTCEPSS rescore
  60. 2026-07-01 15:05 UTCEPSS rescore
  61. 2026-06-30 23:21 UTCEPSS rescore
  62. 2026-06-30 23:21 UTCEPSS rescore
  63. 2026-06-29 14:05 UTCEPSS rescore
  64. 2026-06-28 14:06 UTCEPSS rescore
  65. 2026-06-28 14:06 UTCEPSS rescore
  66. 2026-06-28 04:55 UTCEPSS rescore
  67. 2026-06-27 03:07 UTCEPSS rescore
  68. 2026-06-27 01:37 UTCOSV refresh
  69. 2026-06-25 13:48 UTCEPSS rescore
  70. 2026-06-25 13:48 UTCEPSS rescore
  71. 2026-06-24 14:04 UTCEPSS rescore
  72. 2026-06-24 14:04 UTCEPSS rescore
  73. 2026-06-23 21:31 UTCEPSS rescore
  74. 2026-06-23 21:31 UTCEPSS rescore
  75. 2026-06-22 14:24 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-6546?
CVE-2023-6546 is a high vulnerability published on December 21, 2023. A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOCSETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsmdlci while restarting the…
When was CVE-2023-6546 disclosed?
CVE-2023-6546 was first published in the National Vulnerability Database on December 21, 2023, 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-2023-6546 actively exploited?
CVE-2023-6546 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.8% of all scored CVEs.
What is the CVSS score of CVE-2023-6546?
CVE-2023-6546 has a CVSS v3 base score of 7.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.8.
How do I remediate CVE-2023-6546?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-6546, 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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