There is a vulnerability in the strided image data parsing code in the emscripten wrapper for libheif. An attacker could exploit this through a crafted image file to cause a buffer overflow in linear memory during a memcpy call.
CVE-2023-0996
HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-02-24. NVD baseline CVSS 7.8; sources differ by 0.0.
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: 0%CVSS: 7.8Exploit: None knownExposed: 0
A fix is available — apply it.
- CVSS v3
- 7.8
- EG Score
- 7.8(medium)
- EG Risk
- 35(Track)EG Risk 35/100SSVC: 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 computedSeverity78% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 24%
- KEV
- Not listed
Published
February 24, 2023
Last Modified
March 11, 2025
References (4)
- cve_disclosure@techhttps://github.com/strukturag/libheif/pull/759
- cve_disclosure@techhttps://govtech-csg.github.io/security-advisories/2023/02/24/CVE-2023-0996.html
- af854a3a-2127-422b-91ae-364da2661108https://github.com/strukturag/libheif/pull/759
- af854a3a-2127-422b-91ae-364da2661108https://govtech-csg.github.io/security-advisories/2023/02/24/CVE-2023-0996.html
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Frequently asked(5)
What is CVE-2023-0996?
CVE-2023-0996 is a high vulnerability published on February 24, 2023. There is a vulnerability in the strided image data parsing code in the emscripten wrapper for libheif. An attacker could exploit this through a crafted image file to cause a buffer overflow in linear memory during a memcpy call.
When was CVE-2023-0996 disclosed?
CVE-2023-0996 was first published in the National Vulnerability Database on February 24, 2023, with the most recent update on March 11, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-0996 actively exploited?
CVE-2023-0996 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 76.3% of all scored CVEs.
What is the CVSS score of CVE-2023-0996?
CVE-2023-0996 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-0996?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-0996, 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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