Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-58049

8.6 · HIGH

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 rath…

Published Jun 28, 2026CWE-787EPSS 0.50%

Overview

CVE-2026-58049 is a high-severity vulnerability. It was published on June 28, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/FFmpeg/FFmpeg/blob/master/libavcodec/rasc.cGitHubgithub.com/bikini/exploitarium/tree/main/ffmpeg-rasc-dlta-calc-pocRefwww.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-in-rasc-decoder-decode-dltaRefaccess.redhat.com/errata/RHSA-2026:43711Refaccess.redhat.com/errata/RHSA-2026:51180Refaccess.redhat.com/errata/RHSA-2026:52832Refaccess.redhat.com/errata/RHSA-2026:52833Refaccess.redhat.com/errata/RHSA-2026:60520Refaccess.redhat.com/security/cve/CVE-2026-58049Refbugzilla.redhat.com/show_bug.cgi?id=2493952

How CyberStrike helps

Frequently asked questions

What is CVE-2026-58049?

CVE-2026-58049 is a high-severity vulnerability. It was published on June 28, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2026-58049?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-58049?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-58049?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-58049 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999