# CVE-2026-119842: Gst-plugins-base: gst-plugins-base: null-pointer dereference in mdvdsub subtitle parser via missing closing-brace check

Status: published. Published: 2026-10-30. Updated: 2026-11-03.

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.

## Remediation

- workaround: Avoid untrusted MicroDVD (.sub) subtitle files; disable automatic subtitle loading if supported. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (gstreamer1-plugins-base): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (gstreamer-plugins-base): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (gstreamer1-plugins-base): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (gstreamer-plugins-base): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gstreamer1-plugins-base): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gstreamer1-plugins-base): Version range not reported. Source: CNA: redhat
- GStreamer project / gst-plugins-base: ≥ 0; < 1.28.2 (affected, semver); 1.28.2 (unaffected). Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H; source: CNA: redhat

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 0.33% as of 2026-11-02; percentile 26.38%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-476

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-119842 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2564183 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11238.patch (CNA: redhat)

- https://gstreamer.freedesktop.org/security/sa-2026-0019.html (CNA: redhat)

- https://access.redhat.com/security/cve/CVE-2026-119842 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2564183 (secalert@redhat.com)

- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11238.patch (secalert@redhat.com)

- https://gstreamer.freedesktop.org/security/sa-2026-0019.html (secalert@redhat.com)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-119842; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119842; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-119842; retrieved 2026-11-03; source updated Not reported

Revision: 1225bbbcb9c8dae3797eab9b864d10cd03de8ee96ce35576199a312d375fa49a

Canonical: https://y2.dev/cve/CVE-2026-119842

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