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TI-2026-52799 Aliases CVE-2026-75146GHSA-564v-jr2q-mgwf

FFmpeg Out-of-Bounds Read in DASH Demuxer via dashdec.c

Priority LOW 31CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

FFmpeg before commit 65b0dab contains an out-of-bounds read in the DASH demuxer (libavformat/dashdec.c). When a live DASH manifest is refreshed with a startNumber that is lower than the previous value, the current sequence number is driven negative. The fragment retrieval function checked only the upper bound before indexing the fragments array, allowing a negative index to be used and causing an out-of-bounds read. A malicious or misconfigured DASH server can trigger this by serving a live manifest with a decreasing startNumber across a manifest refresh.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00261 18th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*——FFmpeg
  • cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* Versions — — ·FFmpeg

Remediation

Red Hat 1 advisory

  • RHSA-2026:94488 Released 2026-11-03 · Red Hat rating Important
    RHEL AI 3.5 RPM runtime CVE fix - ffmpeg
    • Red Hat Enterprise Linux AI 3.5 for RHEL 9 ffmpeg-6.1.6-10.el9ai, ffmpeg-free-rhai-6.1.6-10.el9ai, ffmpeg-free-rhai-devel-6.1.6-10.el9ai +16

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI 3.5 for RHEL 9Fixed RHSA-2026:94488

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-75146
  2. 2026-10-03 Alias added: GHSA-564v-jr2q-mgwf
  3. 2026-11-03 Fix available: RHSA-2026:94488 · Red Hat
  4. 2026-11-03 Fix available: Red Hat Enterprise Linux AI 3.5 for RHEL 9 · Red Hat

References

Patch 1

Other 1

  • TI-2025-19015 FFmpeg git-master before commit d5873b was discovered to contain a memory leak in the component libavutil/iamf.c. CVSS 3.1HIGH 8.8
  • TI-2024-21238 FFmpeg 7.0 contains a heap-buffer-overflow at libavfilter/vf_tiltandshift.c:189:5 in copy_column. CVSS 3.1HIGH 8.4
  • TI-2023-06050 Ffmpeg: null pointer dereference in ffmpeg hls parsing CVSS 3.1HIGH 7.5
  • TI-2023-28420 Buffer Overflow vulnerability in Ffmpeg v.N113007-g8d24a28d06 allows a local attacker to… CVSS 3.1HIGH 8.0
  • TI-2023-27357 FFmpeg v.n6.1-3-g466799d4f5 allows a heap-based buffer overflow via the… CVSS 3.1HIGH 8.0
  • TI-2023-27044 Buffer Overflow vulnerability in FFmpeg version n6.1-3-g466799d4f5, allows a local… CVSS 3.1HIGH 8.0
See all 538 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences