Bug 2486353 (CVE-2026-52719)

Summary:	CVE-2026-52719 gstreamer1-plugins-bad-free: GStreamer: Out-of-bounds read via JPEG segment length validation in VA decoder
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	rhel-process-autobot, security-response-team, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	An out-of-bounds read vulnerability was found in the VA JPEG decoder in GStreamer's gst-plugins-bad. The JPEG parser reads a segment length value from the bitstream without validating it against available data. A remote attacker could trick a user into opening a specially crafted JPEG file, causing downstream parsing to read beyond the provided input buffer, leading to a crash or potential information disclosure.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2026-06-08 13:55:33 UTC

GStreamer VA JPEG decoder out-of-bounds read vulnerability. In gstjpegparser.c (gst-plugins-bad), the gst_jpeg_parse() function reads a segment length from the bitstream without validating it against available data. The VA JPEG decoder path trusts this untrusted seg->size value and constructs a byte reader over an inflated range, reading past the buffer. The code's own comment explicitly acknowledges this: "a valid segment may be returned with a length that exceeds the available data." Upstream confirmed by maintainer Sebastian Dröge (2026-06-02), who noted it is "actually a bug in the VA JPEG decoder in gst-plugins-bad" and "an OOB read that could lead to a crash or possibly information disclosure." Fix planned for GStreamer 1.28.4 or 1.28.5. Upstream issue: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5104 (confidential). Reported via PSIRTSUPT-17026 by JUNYI LIU / Moss 1.