Bug 2564183 (CVE-2026-119842)
| Summary: | CVE-2026-119842 gst-plugins-base: gst-plugins-base: NULL-pointer dereference in mDVDsub subtitle parser via missing closing-brace check | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security <prodsec-ir-bot> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | rhel-process-autobot, watson-tool-maintainers |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
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| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in GStreamer's gst-plugins-base MicroDVD subtitle parser. When processing a specially crafted subtitle file, the parser may dereference a NULL pointer, causing the application to crash when a user opens or plays media with a malformed MicroDVD (.sub) subtitle file.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
gst-plugins-base ships the mDVDsub (MicroDVD) subtitle parser in gst/subparse/gstsubparse.c. In parse_mdvdsub, lines 578 and 582 call strchr(line, '}') + 1 without a NULL check for {y:i} and {y:b} style tags; the adjacent {s:%u} branch checks NULL. Crash-only DoS via crafted MicroDVD .sub files. Affected: gst-plugins-base < 1.28.2. Fixed: 1.28.2 (MR 11238). CVE: CVE-2026-119842. GStreamer-SA-2026-0019 (2026-04-07).