Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%

Buy Us a Coffee

CVE-2026-125181— FFmpeg through 9.0.2 FLIC Decoder Out-of-Bounds Write via FLI_BRUN Byte Swap

Quick assessment

Affected

FFmpeg FFmpeg

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FFmpeg 9.0.2 及更早版本在 libavcodec/flicvideo.c 中的 flic_decode_frame_15_16BPP() 函数存在越界写入漏洞。在大端（big-endian）构建中，攻击者可利用该漏洞破坏堆内存。攻击者可以提供一个特制的 15/16 位每像素（bpp）FLIC/FLX 文件，其中包含一个 FLI_BRUN 数据块；该数据块中的非终止字节交换循环会将基于数据包的数据写入帧缓冲区之外，从而导致进程崩溃。

CVSS 7.0 · High Updated Nov 10, 2026

Possible ATT&CK Techniques 2 AI

T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
FFmpeg	FFmpeg	`≤ 9.0.2`	affected

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

FFmpeg through 9.0.2 FLIC Decoder Out-of-Bounds Write via FLI_BRUN Byte Swap

Source: CVE Program / CVE List V5

Vulnerability Description

FFmpeg through 9.0.2 contains an out-of-bounds write vulnerability in flic_decode_frame_15_16BPP() in libavcodec/flicvideo.c that allows attackers to corrupt heap memory on big-endian builds. Attackers can supply a crafted 15/16 bpp FLIC/FLX file with an FLI_BRUN chunk whose non-terminating byte-swap loop writes packet-derived data past the frame buffer, crashing the process.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存写

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
FFmpeg	FFmpeg	0 ~ 9.0.2	-

II. Public POCs for CVE-2026-125181

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-125181

请登录查看更多情报信息。

Other References for CVE-2026-125181 (6)

https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/flicvideo.c#L883 technical-description
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24901 issue-tracking
https://github.com/FFmpeg/FFmpeg/commit/eb47d7bb6cf13042c6ab14e22fc0c0c3a6e51e12 patch
https://github.com/FFmpeg/FFmpeg/commit/c0d308a9a616f4abcc4e0a4d86f7de92ecdef9f6 patch
https://github.com/FFmpeg/FFmpeg/commit/ee30fb98c0d4e97abbd5e371d2a3a926e92bec70 patch
https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-flic-decoder-out-of-bounds-write-via-fli-brun-byte-swap third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-125181

Same Patch Batch · FFmpeg · 2026-11-09 · 121 CVEs total

CVE-2026-125233	7.8 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via DVB Subtitle Encoder
CVE-2026-125209	7.8 HIGH	FFmpeg before 8.1.3 and 9.x before 9.0.2 Heap Buffer Overflow via dvdsubenc.c
CVE-2026-125250	7.8 HIGH	FFmpeg through 9.0.2 GIF Encoder Heap Buffer Overflow via shrunk_buf Remap
CVE-2026-125267	7.8 HIGH	FFmpeg before 8.1.3 and 9.x before 9.0.2 Heap Out-of-Bounds Write via APAC Decoder
CVE-2026-125262	7.8 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via LCEVC Enhancement Decoding
CVE-2026-125203	7.8 HIGH	FFmpeg before 8.1.3 and 9.x before 9.0.2 Heap Buffer Overflow in Cook Multichannel Decoder
CVE-2026-125259	7.8 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via ProRes prores_ks Encoder
CVE-2026-125229	7.8 HIGH	FFmpeg through 9.0.2 Out-of-Bounds Memory Access in Huffyuv/FFVHUFF Median Predictor
CVE-2026-125244	7.8 HIGH	FFmpeg before 8.1.3 and 9.x before 9.0.2 VVC Decoder Out-of-Bounds Write via sh_entry_poin
CVE-2026-125212	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via VideoToolbox Encoder
CVE-2026-125211	7.0 HIGH	FFmpeg through 9.0.2 Heap Corruption via libaribcaption ASS Error Cleanup
CVE-2026-125222	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via hap_parse_frame_header()
CVE-2026-125210	7.0 HIGH	FFmpeg through 9.0.2 Heap Overflow in libaribcaption Text Subtitle Decoding
CVE-2026-125219	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC VDPAU Tile Arrays
CVE-2026-125257	7.0 HIGH	FFmpeg through 9.0.2 Heap Overflow via Nellymoser Encoder Trellis Search
CVE-2026-125248	7.0 HIGH	FFmpeg 9.0 through 9.0.2 Integer Overflow via FFV1 Vulkan Encoder Remap Buffer
CVE-2026-125213	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via PSD Decoder RLE Path
CVE-2026-125202	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC VAAPI Tile Arrays
CVE-2026-125241	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via FLIC Decoder check_pixel_ptr
CVE-2026-125235	7.0 HIGH	FFmpeg through 9.0.2 Heap Overflow via QSV Encoder submit_frame()

Showing top 20 of 121 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: FFmpeg

Same vendor: FFmpeg

Same weakness: CWE-787