EUVD-2026-75905
GHSA-h8hr-49hh-qr69
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Local file open required (AV:L); no privileges needed (PR:N); user must open the file (UI:R); only heap read, no write or integrity impact (I:N).
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
3DescriptionCVE.org
A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV file containing CEA-608 closed-caption data, an integer overflow in 32-bit unsigned arithmetic can bypass a bounds check in the caption parser. This leads to an out-of-bounds heap read of up to 244 bytes, which is then included in the downstream caption output. An attacker could exploit this by tricking a user into opening a malicious media file, potentially resulting in disclosure of adjacent heap memory or application crash.
AnalysisAI
Integer overflow in GStreamer's gst-plugins-good isomp4 plugin exposes adjacent heap memory when parsing CEA-608 closed-caption data embedded in specially crafted MP4 or MOV files. The 32-bit unsigned arithmetic wraparound bypasses a bounds check, enabling an out-of-bounds heap read of up to 244 bytes that is forwarded into downstream caption output - leaking process memory to an attacker who controls caption rendering output. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target must open a specially crafted MP4 or MOV file that contains a CEA-608 closed-caption track with maliciously constructed size fields. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L) correctly places this in the moderate range at 4.4. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to apply the upstream patch delivered via GStreamer merge request MR !12433 (https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12433). … Detailed patch versions, workarounds, and compensating controls in full report. |
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