CVE-2024-27280

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 6.5%, top 9% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value. 3.0.3 is the main fixed version; however, for Ruby 3.0 users, a fixed version is stringio 3.0.1.1, and for Ruby 3.1 users, a fixed version is stringio 3.0.1.2.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
—
EPSS
82.0%
KEV
Not listed

Published

May 14, 2024

Last Modified

April 15, 2026

Advisory Details (8)

Auto-updated May 2, 2026
Patch available.
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20250502-0003/
generic

[SECURITY] Fedora 40 Update: ruby-3.3.1-7.fc40 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XYDHPHEZI7OQXTQKTDZHGZNPIJH7ZV5N/
generic

[SECURITY] Fedora 38 Update: ruby-3.2.4-182.fc38 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/27LUWREIFTP3MQAW7QE4PJM4DPAQJWXF/
generic Patch Available

[SECURITY] [DLA 3858-1] ruby2.7 security update

https://lists.debian.org/debian-lts-announce/2024/09/msg00000.html
generic

Full Disclosure: APPLE-SA-09-15-2025-7 macOS Sonoma 14.8

http://seclists.org/fulldisclosure/2025/Sep/55
generic

Full Disclosure: APPLE-SA-09-15-2025-6 macOS Sequoia 15.7

http://seclists.org/fulldisclosure/2025/Sep/54
generic

Full Disclosure: APPLE-SA-09-15-2025-5 macOS Tahoe 26

http://seclists.org/fulldisclosure/2025/Sep/53
generic

CVE-2024-27280: Buffer overread vulnerability in StringIO | Ruby

https://www.ruby-lang.org/en/news/2024/03/21/buffer-overread-cve-2024-27280/

Vendor Advisories for CVE-2024-27280(1)

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

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
ubunturuby3.1-doc (3.1.2-7ubuntu3.3) @ mantic2026-05-22ubuntu
ubunturuby2.5-doc (2.5.1-1ubuntu1.16+esm5) @ bionic2026-05-22ubuntu
redhatruby:2.5-8100020240627152904.489197e62024-07-11redhat
redhatruby-0:3.0.7-162.el9_42024-06-11redhat
redhatruby:3.3-9040020240522171337.92024-06-06redhat
redhatruby:3.3-8100020240522151542.489197e62024-06-06redhat
redhatruby:3.1-9040020240503183840.92024-06-06redhat
redhatruby:3.1-8100020240510101534.489197e62024-06-03redhat
redhatruby:3.0-8100020240522072634.489197e62024-05-30redhat

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

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
stringio0.0.1 ... 3.0.1 (7 versions)3.0.1.1—

Weakness Classification(1)

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 10× 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.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
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  20. 2026-07-11 06:41 UTCOSV refresh
  21. 2026-07-09 19:09 UTCEPSS rescore
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  1. 2026-07-06 16:26 UTCEPSS rescore
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  22. 2026-06-22 14:24 UTCEPSS rescore
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  24. 2026-06-22 13:26 UTCOSV refresh
  25. 2026-06-21 14:55 UTCEPSS rescore
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  27. 2026-06-21 01:58 UTCEPSS rescore
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  29. 2026-06-19 19:24 UTCEPSS rescore
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  46. 2026-06-08 14:16 UTCEPSS rescore
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  48. 2026-06-07 15:24 UTCEPSS rescore
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  50. 2026-06-06 13:46 UTCEPSS rescore
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  54. 2026-06-05 06:09 UTCEPSS rescore
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  56. 2026-06-04 20:39 UTCOSV refresh
  57. 2026-06-04 13:11 UTCEPSS rescore
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  74. 2026-05-27 13:40 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-27280?
CVE-2024-27280 is a critical vulnerability published on May 14, 2024. A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value. 3.0.3 is the main fixed…
When was CVE-2024-27280 disclosed?
CVE-2024-27280 was first published in the National Vulnerability Database on May 14, 2024, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-27280 actively exploited?
CVE-2024-27280 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 82.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-27280?
CVE-2024-27280 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-27280?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-27280, 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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