8.8

CVE-2026-58049

FFmpeg - Out-of-Bounds Write in RASC Decoder decode_dlta()

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.
Daten sind bereitgestellt durch das CVE Programm von Authorized Data Publishers (ADP) (Unstrukturiert)
HerstellerRed Hat
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Produkt Red Hat AI Inference Server
Default Statusaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux AI (RHEL AI) 3
Default Statusaffected
HerstellerRed Hat
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Produkt Red Hat OpenShift AI (RHOAI)
Default Statusaffected
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.121
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
disclosure@vulncheck.com 8.8 0 0
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
disclosure@vulncheck.com 8.6 3.9 4.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.6 2.8 4.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

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
https://access.redhat.com/security/cve/CVE-2026-58049
https://bugzilla.redhat.com/show_bug.cgi?id=2493952
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-58049.json