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CVE-2026-125210— FFmpeg through 9.0.2 Heap Overflow in libaribcaption Text Subtitle Decoding

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 及以下版本在文件的函数中存在堆缓冲区溢出漏洞。当使用为的模式进行解码时，攻击者可构造一个包含零个区域的 ARIB STD-B24 字幕流，导致程序向零字节分配区域之后的指针位置写入数据，从而破坏堆内存。

CVSS 7.0 · High Updated Nov 10, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

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

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Vulnerability Information

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

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Vulnerability Title

FFmpeg through 9.0.2 Heap Overflow in libaribcaption Text Subtitle Decoding

Source: CVE Program / CVE List V5

Vulnerability Description

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in aribcaption_trans_text_subtitle() in libavcodec/libaribcaption.c when decoding with sub_type text. Attackers can supply a crafted ARIB STD-B24 caption stream with zero regions, causing a pointer write past a zero-sized sub->rects allocation and corrupting heap memory.

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

缓冲区大小计算不正确

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-2026-125210

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-125210

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Other References for CVE-2026-125210 (4)

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24992 issue-tracking
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/libaribcaption.c#L799 technical-description
https://github.com/FFmpeg/FFmpeg/commit/7c06aea6f0d26dd70c94ccba6127059cd0a0e352 patch
https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-overflow-in-libaribcaption-text-subtitle-decoding third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-125210

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-2026-125259	7.8 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via ProRes prores_ks Encoder
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-2026-125262	7.8 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via LCEVC Enhancement Decoding
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-2026-125209	7.8 HIGH	FFmpeg before 8.1.3 and 9.x before 9.0.2 Heap Buffer Overflow via dvdsubenc.c
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-2026-125250	7.8 HIGH	FFmpeg through 9.0.2 GIF Encoder Heap Buffer Overflow via shrunk_buf Remap
CVE-2026-125241	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via FLIC Decoder check_pixel_ptr
CVE-2026-125249	7.0 HIGH	FFmpeg 7.1 through 9.0.2 Heap Out-of-Bounds Write via Vulkan Slice Buffer Sizing
CVE-2026-125211	7.0 HIGH	FFmpeg through 9.0.2 Heap Corruption via libaribcaption ASS Error Cleanup
CVE-2026-125196	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via liboapv APV Encoder Wrapper
CVE-2026-125222	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via hap_parse_frame_header()
CVE-2026-125218	7.0 HIGH	FFmpeg through 9.0.2 APNG Encoder Heap Buffer Overflow via encode_apng()
CVE-2026-125213	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via PSD Decoder RLE Path
CVE-2026-125181	7.0 HIGH	FFmpeg through 9.0.2 FLIC Decoder Out-of-Bounds Write via FLI_BRUN Byte Swap
CVE-2026-125260	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow in EXR Encoder RLE Path
CVE-2026-125212	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via VideoToolbox Encoder
CVE-2026-125239	7.0 HIGH	FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC DXVA Tile Parameters

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

IV. Related Vulnerabilities

Same product: FFmpeg

Same vendor: FFmpeg

Same weakness: CWE-131