CVE-2023-4813

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2023-09-13. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 5.9Exploit: Elevated riskExposed: 0

A fix is available — apply it.

A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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
Severity59% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
74%
KEV
Not listed

Published

September 12, 2023

Last Modified

June 17, 2026

References (13)

Vendor Advisories for CVE-2023-4813(1)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntunscd (2.27-3ubuntu1.6+esm1) @ bionic2026-05-24ubuntu
redhatglibc-0:2.34-100.el92024-04-30redhat
redhatglibc-0:2.28-189.8.el8_62023-11-21redhat
redhatglibc-0:2.34-60.el9_2.72023-10-05redhat
redhatglibc-0:2.28-225.el8_8.62023-10-05redhat

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
glibc2.31-13 ... 2.43-2 (208 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
glibc—2.36-3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
glibc—2.36-3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
glibc—2.36-3—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

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 9× 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 131 total refreshes for this CVE.

  1. 2026-08-10 23:57 UTCEPSS rescore
  2. 2026-08-09 13:44 UTCEPSS rescore
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  14. 2026-08-02 02:19 UTCOSV refresh
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  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 02:28 UTCEG score recompute
  3. 2026-07-22 23:14 UTCEG score recompute
  4. 2026-07-22 14:06 UTCEPSS rescore
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  14. 2026-07-15 16:56 UTCEPSS rescore
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  16. 2026-07-15 09:49 UTCOSV refresh
  17. 2026-07-15 01:59 UTCEPSS rescore
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  19. 2026-07-13 22:28 UTCEPSS rescore
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  23. 2026-07-12 05:45 UTCEPSS rescore
  24. 2026-07-11 08:26 UTCEPSS rescore
  25. 2026-07-09 19:08 UTCEPSS rescore
  26. 2026-07-08 15:13 UTCEPSS rescore
  27. 2026-07-07 13:44 UTCEPSS rescore
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  37. 2026-06-30 23:21 UTCEPSS rescore
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  40. 2026-06-28 14:06 UTCEPSS rescore
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  42. 2026-06-28 04:55 UTCEPSS rescore
  43. 2026-06-27 10:04 UTCOSV refresh
  44. 2026-06-27 03:07 UTCEPSS rescore
  45. 2026-06-25 13:48 UTCEPSS rescore
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  47. 2026-06-24 14:04 UTCEPSS rescore
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  49. 2026-06-23 21:31 UTCEPSS rescore
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  51. 2026-06-22 14:24 UTCEPSS rescore
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  53. 2026-06-21 14:55 UTCEPSS rescore
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  59. 2026-06-18 17:51 UTCEPSS rescore
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  65. 2026-06-13 22:59 UTCEPSS rescore
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  67. 2026-06-12 23:11 UTCEPSS rescore
  68. 2026-06-12 23:10 UTCEPSS rescore
  69. 2026-06-11 13:59 UTCEPSS rescore
  70. 2026-06-10 22:17 UTCEPSS rescore
  71. 2026-06-10 13:21 UTCEPSS rescore
  72. 2026-06-09 20:47 UTCOSV refresh
  73. 2026-06-08 14:16 UTCEPSS rescore
  74. 2026-06-08 14:16 UTCEPSS rescore
  75. 2026-06-07 15:24 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-4813?
CVE-2023-4813 is a medium vulnerability published on September 12, 2023. A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with…
When was CVE-2023-4813 disclosed?
CVE-2023-4813 was first published in the National Vulnerability Database on September 12, 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-2023-4813 actively exploited?
CVE-2023-4813 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 25.7% of all scored CVEs.
What is the CVSS score of CVE-2023-4813?
CVE-2023-4813 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2023-4813?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-4813, 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-2023-4813

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