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TI-2026-49338 Aliases CVE-2026-70628GHSA-qw9h-2hhv-hpfr

FFmpeg 0.5 < 9.0 DVB Subtitle Parser Heap Buffer Overflow via WTV File

Priority LOW 38CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

FFmpeg versions from 0.5 up to, but not including, 9.0 contain a signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c that allows attackers to trigger a heap buffer overflow by supplying a crafted WTV file. The overflow causes the bounds-check guard expression to wrap to INT_MIN, bypassing the PARSE_BUF_SIZE comparison and invoking memcpy() with attacker-controlled data into a heap buffer, resulting in an out-of-bounds heap write and potential memory corruption or code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00145 3rd percentileScored 2026-11-07
Fix Partial FFmpeg (FFmpeg): 9.0Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
FFmpegFFmpeg0.5 to before 9.09.0Patch availableCNA
  • FFmpeg VendorFFmpeg Affected 0.5 to before 9.0 Fixed in 9.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*0.5 to before 9VulnerableFFmpeg
  • cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* Versions 0.5 to before 9 Vulnerable ·FFmpeg

Remediation

  • Fix · CNA FFmpeg (FFmpeg) Fixed in 9.0

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

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    FFmpeg 9.0

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-49342 FFmpeg 4.4 < 9.0 Heap Out-of-Bounds Write in CFHD Decoder via AVI DemuxingPriority LOW 38
    • TI-2026-49341 FFmpeg 0.5 < 9.0 Uninitialized Heap Memory Read in TIFF DecoderPriority LOW 29
    • TI-2026-49340 FFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in Screenpresso DecoderPriority LOW 29
    Show all 5 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat Enterprise Linux AI 3.5 for RHEL 9Fixed RHSA-2026:94488

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-70628
  2. 2026-10-03 Alias added: GHSA-qw9h-2hhv-hpfr
  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 4

  • 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 514 →

Sources

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