CVE-2021-30498

CRITICALNVD 7.89.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 7.8; sources differ by 2.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in libcaca. A heap buffer overflow in export.c in function export_tga might lead to memory corruption and other potential consequences.

CVSS v3
7.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
70%
KEV
Not listed

Published

May 26, 2021

Last Modified

November 3, 2025

Advisory Details (7)

Auto-updated Sep 25, 2026
Patch available. Sources: redhat.
generic Patch Available

[SECURITY] [DLA 4257-1] libcaca security update

https://lists.debian.org/debian-lts-announce/2025/07/msg00019.html
generic Patch Available

[SECURITY] [DLA 3784-1] libcaca security update

https://lists.debian.org/debian-lts-announce/2024/04/msg00004.html
generic

[ Security] heap-buffer-overflow of export.c in function export_tga · Issue #53 · cacalabs/libcaca · GitHub

https://github.com/cacalabs/libcaca/issues/53
redhat Patch Available

1948675 – (CVE-2021-30498) CVE-2021-30498 libcaca: Heap buffer overflow of export.c in function export_tga

https://bugzilla.redhat.com/show_bug.cgi?id=1948675
generic

[SECURITY] Fedora 36 Update: libcaca-0.99-0.59.beta20.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/
generic

[SECURITY] Fedora 34 Update: libcaca-0.99-0.59.beta20.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/
generic

[SECURITY] Fedora 35 Update: libcaca-0.99-0.59.beta20.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/

Affected Packages

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
libcaca0.99.beta19-2.10.99.beta19-2.1+deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libcaca0.99.beta19-2.20.99.beta19-2.2+deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libcaca—0.99.beta19-3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libcaca—0.99.beta19-3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libcaca—0.99.beta19-3—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 29× 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 162 total refreshes for this CVE.

  1. 2026-09-24 14:00 UTCEPSS rescore
  2. 2026-09-23 13:44 UTCEPSS rescore
  3. 2026-09-21 20:28 UTCEPSS rescore
  4. 2026-09-19 15:37 UTCEPSS rescore
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  17. 2026-09-06 16:31 UTCOSV refresh
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  1. 2026-08-30 19:14 UTCEPSS rescore
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  10. 2026-08-20 22:52 UTCEPSS rescore
  11. 2026-08-20 02:34 UTCOSV refresh
  12. 2026-08-19 17:01 UTCEPSS rescore
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  25. 2026-08-06 13:43 UTCEPSS rescore
  26. 2026-08-05 19:14 UTCEPSS rescore
  27. 2026-08-04 21:48 UTCOSV refresh
  28. 2026-08-04 15:06 UTCEPSS rescore
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  43. 2026-07-23 02:00 UTCEG score recompute
  44. 2026-07-22 22:47 UTCEG score recompute
  45. 2026-07-22 14:06 UTCEPSS rescore
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  49. 2026-07-20 17:05 UTCEPSS rescore
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  54. 2026-07-18 10:02 UTCEPSS rescore
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Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2021-30498?
CVE-2021-30498 is a critical vulnerability published on May 26, 2021. A flaw was found in libcaca. A heap buffer overflow in export.c in function export_tga might lead to memory corruption and other potential consequences.
When was CVE-2021-30498 disclosed?
CVE-2021-30498 was first published in the National Vulnerability Database on May 26, 2021, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-30498 actively exploited?
CVE-2021-30498 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 29.8% of all scored CVEs.
What is the CVSS score of CVE-2021-30498?
CVE-2021-30498 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2021-30498?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-30498, 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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