# CVE-2026-119727: Gst-plugins-bad: gst-plugins-bad: h.265 sps scc palette predictor array overflow via integer underflow in bounds computation

Status: published. Published: 2026-10-30. Updated: 2026-11-02.

A flaw was found in GStreamer's gst-plugins-bad H.265 video parser. When parsing a specially crafted H.265 bitstream containing a Screen Content Coding (SCC) extension with certain palette predictor initializer settings, an integer underflow in the upper-bound computation allows the parser to accept an out-of-range value for the number of palette predictor entries. This causes the parser to write beyond the end of a fixed-size array, resulting in memory corruption and an application crash. Successful exploitation requires an attacker to provide a malformed H.265 media file to a vulnerable application, and is limited to a denial-of-service impact.

## Remediation

- workaround: No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (gstreamer1-plugins-bad-free): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (gstreamer1-plugins-bad-free): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gstreamer1-plugins-bad-free): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gstreamer1-plugins-bad-free): Version range not reported. 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

- CISA KEV: No listing in collected sources

- EPSS: 0.25% as of 2026-11-02; percentile 16.71%

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

- Weaknesses: CWE-122

## Exploit evidence

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

## References

- https://access.redhat.com/security/cve/CVE-2026-119727 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2564118 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/10902.patch (CNA: redhat)

- https://gstreamer.freedesktop.org/security/sa-2026-0012.html (CNA: redhat)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-119727; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-119727; retrieved 2026-11-02; source updated Not reported

Revision: f804027a5e4a85d7675c40cde96a65557eb4d41cb400ba0f66e22fa235f7542d

Canonical: https://y2.dev/cve/CVE-2026-119727

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