Vulnerability DatabaseCVE-2026-125235
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-125235
Published:November 09, 2026
Updated:November 10, 2026
FFmpeg through 9.0.2 contains a heap overflow vulnerability in libavcodec/qsvenc.c that allows attackers to corrupt memory by reusing an undersized pooled QSVFrame buffer when input dimensions increase. Attackers can supply crafted input whose resolution grows mid-stream, transcoded with Intel Quick Sync encoders without rescaling, to crash the application or corrupt heap memory.
Related Resources (8)
https://github.com/FFmpeg/FFmpeg
https://code.ffmpeg.org/FFmpeg/FFmpeg
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25682
https://nvd.nist.gov/vuln/detail/CVE-2026-125235
https://github.com/FFmpeg/FFmpeg/commit/9b99973b2bbecee0b7e1e57035b95498b42f54a6
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/qsvenc.c#L2081
https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-overflow-via-qsv-encoder-submit-frame
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/125xxx/CVE-2026-125235.json
Do you need more information?
Contact Us
CVSS v4
Base Score:
7.3
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Heap-based Buffer Overflow
CWE-122