Vulnerability record
CVE-2026-125241
The short answer
CVE-2026-125241 affects FFmpeg FFmpeg and is rated high (CVSS 7.3). It is not in CISA's KEV catalog; EPSS puts the chance of exploitation in the next 30 days at 0.14%.
What it is
FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in libavcodec/flicvideo.c that allows attackers to write out of bounds because check_pixel_ptr() checks only one bound with negative-stride frames. Attackers can supply a crafted FLIC file whose RLE and delta chunks write pixel data past frame storage, corrupting heap memory to crash applications or possibly execute code.
Weakness: CWE-787.
Severity
7.3 high
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
0.14%
Higher than 3% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- High
- Attack requirements
- Present
- Privileges required
- None
- User interaction
- Passive
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Affected products
FFmpeg. NVD's record lists the exact affected versions.
References
- code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25702
- github.com/FFmpeg/FFmpeg
- github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/flicvideo.c#L63
- github.com/FFmpeg/FFmpeg/commit/27f612b306eb04f81138173f705df9a9b055b01d
- www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-flic-decoder-check-pixel-ptr
Questions
Is CVE-2026-125241 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-11. FIRST's EPSS estimates a 0.14% chance of exploitation in the next 30 days.
How do I fix CVE-2026-125241?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Awaiting Analysis. The description is NVD's text, quoted as published.
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