🟠 《高危安全漏洞：CVE-2026-58049》

CVSS 评分: 高危（8.8）　　状态: Received　　发布时间: 2026-06-28

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英文原文描述

FFmpeg's RASC video decoder (decode_dlta in libavcodec/rasc.c) performs 32-bit reads and writes at the row cursor before the NEXT_LINE row-boundary check and validates the DLTA region in pixel rather than byte units, so a DLTA run on a PAL8 frame can access several bytes past the row allocation. A crafted media stream using the RASC FourCC, decoded by libavcodec, triggers a bitstream-controlled out-of-bounds heap write and adjacent out-of-bounds read, leading to memory corruption.

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🔍 技术细节

字段	值
CVE ID	CVE-2026-58049
CVSS 评分	8.8 🟠
严重程度	高危
CVSS 向量	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/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
CWE 分类	CWE-787
发布时间	2026-06-28
最后更新	2026-06-28
状态	Received
数据来源	disclosure@vulncheck.com

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🔗 参考链接

• https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/rasc.c

• https://github.com/bikini/exploitarium/tree/main/ffmpeg-rasc-dlta-calc-poc

• https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-in-rasc-decoder-decode-dlta

• NVD 正式页面: https://nvd.nist.gov/vuln/detail/CVE-2026-58049

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🤖 本文由 CVE 安全快讯机器人自动生成
英文描述已由 AI 自动翻译为中文，仅供参考，请以原文为准
数据来源: NVD (National Vulnerability Database) | 获取时间: 2026-06-28 18:15