How severe is CVE-2023-6349?

CVE-2023-6349 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-6349 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6349?

CVE-2023-6349 affects Webmproject Libvpx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-6349?

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.

Does CVE-2023-6349 have an EU (EUVD) identifier?

Yes. CVE-2023-6349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58590.

When was CVE-2023-6349 published?

CVE-2023-6349 was published on 2024-05-27 and last updated on 2026-06-17.

CVE-2023-6349

CVE-2023-6349 is a high-severity vulnerability in Webmproject Libvpx with a CVSS 3.x base score of 7.5. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 5.7
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-58590
Weakness: CWE-787
Affected product: Webmproject Libvpx
Published: 2024-05-27
Last modified: 2026-06-17

Description

A heap overflow vulnerability exists in libvpx - Encoding a frame that has larger dimensions than the originally configured size with VP9 may result in a heap overflow in libvpx. We recommend upgrading to version 1.13.1 or above

Frequently asked questions

What is CVE-2023-6349?: A heap overflow vulnerability exists in libvpx - Encoding a frame that has larger dimensions than the originally configured size with VP9 may result in a heap overflow in libvpx. We recommend upgrading to version 1.13.1 or above
How severe is CVE-2023-6349?: CVE-2023-6349 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-6349 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6349?: CVE-2023-6349 affects Webmproject Libvpx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-6349?: 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.
Does CVE-2023-6349 have an EU (EUVD) identifier?: Yes. CVE-2023-6349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58590.
When was CVE-2023-6349 published?: CVE-2023-6349 was published on 2024-05-27 and last updated on 2026-06-17.

References

https://crbug.com/webm/1642

Affected products (1)

cpe:2.3:a:webmproject:libvpx:*:*:*:*:*:*:*:*

More vulnerabilities in Webmproject Libvpx

CVE-2010-4203 — Critical (CVSS 9.8): WebM libvpx (aka the VP8 Codec SDK) before 0.9.5, as used in Google Chrome before 7.0.517.44, allows remote attackers…
CVE-2024-5197 — Critical (CVSS 9.1): There exists interger overflows in libvpx in versions prior to 1.14.1. Calling vpx_img_alloc() with a large value of…
CVE-2023-5217 — High (CVSS 8.8): Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a…
CVE-2023-44488 — High (CVSS 7.5): VP9 in libvpx before 1.13.1 mishandles widths, leading to a crash related to encoding.
CVE-2012-0823 — Medium (CVSS 5.0): VP8 Codec SDK (libvpx) before 1.0.0 "Duclair" allows remote attackers to cause a denial of service (application crash)…

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