How severe is CVE-2023-0996?

CVE-2023-0996 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-0996 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0996?

CVE-2023-0996 affects Struktur Libheif. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-0996?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-0996 published?

CVE-2023-0996 was published on 2023-02-24 and last updated on 2026-06-17.

CVE-2023-0996

CVE-2023-0996 is a high-severity vulnerability in Struktur Libheif with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Struktur Libheif
Published: 2023-02-24
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-0996?: 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.
How severe is CVE-2023-0996?: CVE-2023-0996 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-0996 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0996?: CVE-2023-0996 affects Struktur Libheif. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-0996?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-0996 published?: CVE-2023-0996 was published on 2023-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:struktur:libheif:1.14.2:*:*:*:*:*:*:*

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