High [CVE-2026-119777] Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad-free: stack buffer overflow in h.266/vvc parser
This high-severity Red Hat Linux advisory covers CVE-2026-119777 affecting Red Hat Enterprise Linux 10, Red Hat package: gstreamer1-plugins-bad-free-devel, Red Hat package: gstreamer1-plugins-bad-free-libs.
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Summary
A flaw was found in GStreamer's gst-plugins-bad H.266/VVC parser. When processing a malformed H.266 media file or stream, an integer overflow while parsing profile, tier, and level fields can lead to a stack-based buffer overflow.
An attacker could cause an application to crash and may be able to execute code in the context of the affected application. This vulnerability is rated as Important because a crafted H.266/VVC bitstream can cause a stack out-of-bounds write in GStreamer, potentially crashing the application or allowing code execution with the application's privileges.
Exploitation requires a GStreamer-based application to process attacker-controlled H.266/VVC media; a user or service must open or ingest the file or stream. Based on the currently recorded package versions, gstreamer1-plugins-bad-free in RHEL 10.2.z, 10.3.z, and 10.4 and RHIVOS 2.1 and 2.1-core is affected.
Fedora 43, including its MinGW package, is also affected. RHEL 7 through 9 and RHEL 10.0 ship versions that predate the vulnerable code.
Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-787.
Affected Red Hat products: Red Hat Enterprise Linux 10. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 22 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 22 hours ago·verify at source
Mitigation checklist
- There is no complete mitigation for this vulnerability. As a risk-reduction measure, disable H.266/VVC media ingestion in GStreamer-based applications and media pipelines where that feature is not required. Until a fixed package is available, do not open or transcode H.266/VVC files or streams from untrusted sources.
Official advisory · high-confidence parse· fetched 22 hours ago·verify at source
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