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.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:51180 advisory.

    CVE-2026-64835 FFmpeg: Arbitrary code execution, information disclosure, or denial of service via crafted     ADX/AAX audio files     CVE-2026-58049 FFmpeg: Memory corruption via crafted RASC video stream

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:43711 advisory.

    RPM packages are internal build artifacts and not supported on their own. They are only supported as part     of the Red Hat AI application platform.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-58049)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
333119	RHEL 9 : Backport fixes for CVE-2026-64835 and CVE-2026-58049 (Important) (RHSA-2026:51180)	Nessus	Red Hat Local Security Checks	high
329081	RHEL 9 : RHEL AI 3.5 RPM runtime CVE fix - ffmpeg (Important) (RHSA-2026:43711)	Nessus	Red Hat Local Security Checks	high
323514	Linux Distros Unpatched Vulnerability : CVE-2026-58049	Nessus	Misc.	high

Detections

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CVE-2026-58049

high

Tenable Plugins

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high

high