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CVE-2026-125240— FFmpeg through 9.0.2 Resource Leak in libsvtjpegxs JPEG XS Decoder Wrapper

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 文件的 函数中存在资源泄漏漏洞。当 拒绝帧尺寸时，会导致解码器实例发生泄漏。攻击者可构造包含超大头部的 JPEG XS 流（例如封装在 MPEG-TS 中），反复触发解码器线程和缓冲区的泄漏，从而耗尽系统内存。

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
FFmpeg FFmpeg 8.1≤ 9.0.2 affected
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I. Basic Information for CVE-2026-125240

Vulnerability Information
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Vulnerability Title
FFmpeg through 9.0.2 Resource Leak in libsvtjpegxs JPEG XS Decoder Wrapper
Source: CVE Program / CVE List V5
Vulnerability Description
FFmpeg through 9.0.2 contains a resource leak vulnerability in svt_jpegxs_dec_decode() in libsvtjpegxsdec.c that leaks decoder instances when ff_set_dimensions() rejects frame dimensions. Attackers can supply a crafted JPEG XS stream, for example in MPEG-TS, with oversized headers to repeatedly leak decoder threads and buffers, exhausting memory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FFmpeg FFmpeg 8.1 ~ 9.0.2 -

II. Public POCs for CVE-2026-125240

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III. Intelligence Information for CVE-2026-125240

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Other References for CVE-2026-125240 (4)

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-2026-125260 7.0 HIGH FFmpeg through 9.0.2 Heap Buffer Overflow in EXR Encoder RLE Path
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-2026-125212 7.0 HIGH FFmpeg through 9.0.2 Heap Buffer Overflow via VideoToolbox Encoder
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-401