What is CVE-2026-65706?

CVE-2026-65706 is a high-severity vulnerability in Ffmpeg, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.8/10. Published 2026-07-23.

How severe is CVE-2026-65706?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Ffmpeg

CVE-2026-65706

FFmpeg versions 3.0 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_swaprect video filter that allows attackers to corrupt heap memory by supplying a crafted NV12 video frame with odd width dimensions. The filter_frame…

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ffmpeg — versions 3.0, a7e38b617b32f996beaa371bbf04b39907d7a527

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size
CWE-787 — Out-of-bounds Write

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-65706?: CVE-2026-65706 is a high-severity vulnerability in Ffmpeg, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.8/10. Published 2026-07-23.
How severe is CVE-2026-65706?: High severity. CVSS v3 base score is 7.8 out of 10.