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CVE-2026-65706

HIGH
7.8
CVSS 3.1
Description
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() function reuses a temporary row buffer sized for plane 0's single-byte pixel step across all planes, causing an 18-byte memcpy into a 17-byte heap allocation when processing the two-byte-per-sample interleaved chroma plane of a 17x16 NV12 frame, resulting in heap corruption and process crash with potential for code execution.

Metadata

CVE ID
CVE-2026-65706
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-22 20:26 UTC
Published
2026-07-23 19:05 UTC
Last updated
2026-07-23 19:41 UTC
Primary CWE
CWE-787
Out-of-bounds Write
Vendor / Product
FFmpeg / FFmpeg
Sources
cve.org  ·  NVD

Severity & Metrics

7.8 HIGH CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
FFmpeg FFmpeg — 3.0 ≤ 8.1.2, a7e38b617b32f996beaa371bbf04b39907d7a527
Weakness (CWE)
CWESourceDescription
CWE-131 cna Incorrect Calculation of Buffer Size
CWE-787 cna Out-of-bounds Write
CVSS scores (2)
ScoreSeverityVersionSourceVector
8.5 HIGH 4.0 cna CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8 HIGH 3.1 cna CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References (3)
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