CVE-2026-70630
CVE-2026-70630 · FFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in Screenpresso Decoder
This page contains facts from public vulnerability sources. Check the original advisory before updating.
FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native Screenpresso decoder (libavcodec/screenpresso.c) that allows attackers to recover sensitive memory contents by supplying a crafted SPV1 packet with a valid zlib stream that decompresses fewer bytes than the full frame requires. The screenpresso_decode_frame() function fails to validate the produced byte count before calling av_image_copy_plane() to copy the complete frame dimensions from the persistent ctx->inflated_buf buffer, causing unwritten heap memory from prior allocations or prior frames to be copied into decoded output and potentially exposing sensitive data such as userspace addresses from persistent decoding services.
CVSS 6.8 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
ffmpeg
- Versions
- ≥ 3.0, < 9.0: Affected (custom)
Update to 9.0
ffmpeg Debian:12
- Versions
- 7:5.1.3-1
- 7:5.1.3-2
- 7:5.1.4-0+deb12u1
- 7:5.1.5-0+deb12u1
- 7:5.1.6-0+deb12u1
- 7:5.1.7-0+deb12u1
- 7:5.1.8-0+deb12u1
- 7:5.1.9-0+deb12u1
- 7:6.0-1
- 7:6.0-2
- 7:6.0-3
- 7:6.0-4
- 7:6.0-5
- 7:6.0-6
- 7:6.0-7
- 7:6.0-8
- 7:6.0-9
- 7:6.1-1
- 7:6.1-2
- 7:6.1-3
- 7:6.1-4
- 7:6.1-5
- 7:6.1.1-1
- 7:6.1.1-2
- 7:6.1.1-3
- 7:6.1.1-4
- 7:6.1.1-5
- 7:7.0-1
- 7:7.0.1-1
- 7:7.0.1-2
- 7:7.0.1-3
- 7:7.0.1-4
- 7:7.0.1-5
- 7:7.0.2-1
- 7:7.0.2-2
- 7:7.0.2-3
- 7:7.1-1
- 7:7.1-2
- 7:7.1-3
- 7:7.1-4
- 7:7.1.1-1
- 7:7.1.2-1
- 7:7.1.3-1
- 7:8.0-1
- 7:8.0-2
- 7:8.0.1-1
- 7:8.0.1-2
- 7:8.0.1-3
- 7:8.1-1
- 7:8.1-2
- 7:8.1-3
- 7:8.1.1-1
- 7:8.1.1-2
- 7:8.1.1-3
- 7:8.1.1-4
- 7:8.1.2-1
- 7:8.1.2-2
- 7:9.0-1
- 7:9.0.1-1
- 7:9.0.2-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ffmpeg Debian:13
- Versions
- 7:7.1.1-1
- 7:7.1.2-0+deb13u1
- 7:7.1.2-1
- 7:7.1.3-0+deb13u1
- 7:7.1.3-1
- 7:7.1.4-0+deb13u1
- 7:7.1.5-0+deb13u1
- 7:8.0-1
- 7:8.0-2
- 7:8.0.1-1
- 7:8.0.1-2
- 7:8.0.1-3
- 7:8.1-1
- 7:8.1-2
- 7:8.1-3
- 7:8.1.1-1
- 7:8.1.1-2
- 7:8.1.1-3
- 7:8.1.1-4
- 7:8.1.2-1
- 7:8.1.2-2
- 7:9.0-1
- 7:9.0.1-1
- 7:9.0.2-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ffmpeg Debian:14
- Versions
- 7:7.1.1-1
- 7:7.1.2-1
- 7:7.1.3-1
- 7:8.0-1
- 7:8.0-2
- 7:8.0.1-1
- 7:8.0.1-2
- 7:8.0.1-3
- 7:8.1-1
- 7:8.1-2
- 7:8.1-3
- 7:8.1.1-1
- 7:8.1.1-2
- 7:8.1.1-3
- 7:8.1.1-4
- 7:8.1.2-1
- 7:8.1.2-2
- 7:9.0-1
- 7:9.0.1-1
- Affected ranges
- ECOSYSTEM: < 7:9.0.2-1
Update to 7:9.0.2-1
libav Ubuntu:Pro:14.04:LTS
- Versions
- 6:0.8.7-1ubuntu2
- 6:9.10-1ubuntu1
- 6:9.10-1ubuntu2
- 6:9.10-1ubuntu5
- 6:9.10-1ubuntu6
- 6:9.10-1ubuntu7
- 6:9.11-2ubuntu1
- 6:9.11-2ubuntu2
- 6:9.13-0ubuntu0.14.04.1
- 6:9.14-0ubuntu0.14.04.1
- 6:9.16-0ubuntu0.14.04.1
- 6:9.18-0ubuntu0.14.04.1
- 6:9.20-0ubuntu0.14.04.1
- 6:9.20-0ubuntu0.14.04.1+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ffmpeg Ubuntu:Pro:16.04:LTS
- Versions
- 7:2.7.2-1build1
- 7:2.8.1-1ubuntu1
- 7:2.8.2-1ubuntu1
- 7:2.8.3-1
- 7:2.8.4-1
- 7:2.8.4-1ubuntu1
- 7:2.8.4-1ubuntu2
- 7:2.8.4-1ubuntu3
- 7:2.8.4-1ubuntu4
- 7:2.8.6-1ubuntu1
- 7:2.8.6-1ubuntu2
- 7:2.8.8-0ubuntu0.16.04.1
- 7:2.8.10-0ubuntu0.16.04.1
- 7:2.8.11-0ubuntu0.16.04.1
- 7:2.8.14-0ubuntu0.16.04.1
- 7:2.8.15-0ubuntu0.16.04.1
- 7:2.8.15-0ubuntu0.16.04.1+esm1
- 7:2.8.17-0ubuntu0.1
- 7:2.8.17-0ubuntu0.1+esm1
- 7:2.8.17-0ubuntu0.1+esm2
- 7:2.8.17-0ubuntu0.1+esm3
- 7:2.8.17-0ubuntu0.1+esm4
- 7:2.8.17-0ubuntu0.1+esm5
- 7:2.8.17-0ubuntu0.1+esm6
- 7:2.8.17-0ubuntu0.1+esm7
- 7:2.8.17-0ubuntu0.1+esm8
- 7:2.8.17-0ubuntu0.1+esm9
- 7:2.8.17-0ubuntu0.1+esm10
- 7:2.8.17-0ubuntu0.1+esm11
- 7:2.8.17-0ubuntu0.1+esm12
- 7:2.8.17-0ubuntu0.1+esm13
- 7:2.8.17-0ubuntu0.1+esm14
- 7:2.8.17-0ubuntu0.1+esm15
- 7:2.8.17-0ubuntu0.1+esm16
- 7:2.8.17-0ubuntu0.1+esm17
- 7:2.8.17-0ubuntu0.1+esm18
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ffmpeg Ubuntu:Pro:18.04:LTS
- Versions
- 7:3.3.4-2
- 7:3.3.4-2build3
- 7:3.4-2ubuntu2
- 7:3.4-4
- 7:3.4-4build1
- 7:3.4.1-1
- 7:3.4.1-1build1
- 7:3.4.2-1
- 7:3.4.2-1build1
- 7:3.4.2-2
- 7:3.4.4-0ubuntu0.18.04.1
- 7:3.4.6-0ubuntu0.18.04.1
- 7:3.4.8-0ubuntu0.2
- 7:3.4.11-0ubuntu0.1
- 7:3.4.11-0ubuntu0.1+esm1
- 7:3.4.11-0ubuntu0.1+esm2
- 7:3.4.11-0ubuntu0.1+esm3
- 7:3.4.11-0ubuntu0.1+esm4
- 7:3.4.11-0ubuntu0.1+esm5
- 7:3.4.11-0ubuntu0.1+esm6
- 7:3.4.11-0ubuntu0.1+esm7
- 7:3.4.11-0ubuntu0.1+esm8
- 7:3.4.11-0ubuntu0.1+esm9
- 7:3.4.11-0ubuntu0.1+esm10
- 7:3.4.11-0ubuntu0.1+esm11
- 7:3.4.11-0ubuntu0.1+esm12
- 7:3.4.11-0ubuntu0.1+esm13
- 7:3.4.11-0ubuntu0.1+esm14
- 7:3.4.11-0ubuntu0.1+esm15
- 7:3.4.11-0ubuntu0.1+esm16
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ffmpeg Ubuntu:Pro:20.04:LTS
- Versions
- 7:4.1.4-1build2
- 7:4.2.1-2
- 7:4.2.1-2ubuntu1
- 7:4.2.2-1build1
- 7:4.2.2-1ubuntu1
- 7:4.2.4-1ubuntu0.1
- 7:4.2.4-1ubuntu0.1+esm1
- 7:4.2.7-0ubuntu0.1
- 7:4.2.7-0ubuntu0.1+esm1
- 7:4.2.7-0ubuntu0.1+esm2
- 7:4.2.7-0ubuntu0.1+esm3
- 7:4.2.7-0ubuntu0.1+esm4
- 7:4.2.7-0ubuntu0.1+esm5
- 7:4.2.7-0ubuntu0.1+esm6
- 7:4.2.7-0ubuntu0.1+esm7
- 7:4.2.7-0ubuntu0.1+esm8
- 7:4.2.7-0ubuntu0.1+esm9
- 7:4.2.7-0ubuntu0.1+esm10
- 7:4.2.7-0ubuntu0.1+esm11
- 7:4.2.7-0ubuntu0.1+esm12
- 7:4.2.7-0ubuntu0.1+esm13
- 7:4.2.7-0ubuntu0.1+esm14
- 7:4.2.7-0ubuntu0.1+esm15
- 7:4.2.7-0ubuntu0.1+esm16
- Affected ranges
- ECOSYSTEM: < 7:4.2.7-0ubuntu0.1+esm17
Update to 7:4.2.7-0ubuntu0.1+esm17
ffmpeg Ubuntu:Pro:22.04:LTS
- Versions
- 7:4.4-6ubuntu5
- 7:4.4.1-2ubuntu1
- 7:4.4.1-3ubuntu1
- 7:4.4.1-3ubuntu2
- 7:4.4.1-3ubuntu3
- 7:4.4.1-3ubuntu5
- 7:4.4.2-0ubuntu0.22.04.1
- 7:4.4.2-0ubuntu0.22.04.1+esm1
- 7:4.4.2-0ubuntu0.22.04.1+esm2
- 7:4.4.2-0ubuntu0.22.04.1+esm3
- 7:4.4.2-0ubuntu0.22.04.1+esm4
- 7:4.4.2-0ubuntu0.22.04.1+esm5
- 7:4.4.2-0ubuntu0.22.04.1+esm6
- 7:4.4.2-0ubuntu0.22.04.1+esm7
- 7:4.4.2-0ubuntu0.22.04.1+esm8
- 7:4.4.2-0ubuntu0.22.04.1+esm9
- 7:4.4.2-0ubuntu0.22.04.1+esm10
- 7:4.4.2-0ubuntu0.22.04.1+esm11
- 7:4.4.2-0ubuntu0.22.04.1+esm12
- 7:4.4.2-0ubuntu0.22.04.1+esm13
- 7:4.4.2-0ubuntu0.22.04.1+esm14
- 7:4.4.2-0ubuntu0.22.04.1+esm15
- Affected ranges
- ECOSYSTEM: < 7:4.4.2-0ubuntu0.22.04.1+esm16
Update to 7:4.4.2-0ubuntu0.22.04.1+esm16
ffmpeg Ubuntu:Pro:24.04:LTS
- Versions
- 7:6.0-6ubuntu1
- 7:6.0-9ubuntu1
- 7:6.1-2ubuntu1
- 7:6.1-3ubuntu1
- 7:6.1-4ubuntu1
- 7:6.1-5ubuntu1
- 7:6.1.1-1ubuntu1
- 7:6.1.1-3ubuntu1
- 7:6.1.1-3ubuntu5
- 7:6.1.1-3ubuntu5+esm1
- 7:6.1.1-3ubuntu5+esm2
- 7:6.1.1-3ubuntu5+esm3
- 7:6.1.1-3ubuntu5+esm4
- 7:6.1.1-3ubuntu5+esm5
- 7:6.1.1-3ubuntu5+esm6
- 7:6.1.1-3ubuntu5+esm7
- 7:6.1.1-3ubuntu5+esm8
- 7:6.1.1-3ubuntu5+esm10
- 7:6.1.1-3ubuntu5+esm11
- 7:6.1.1-3ubuntu5+esm12
- 7:6.1.1-3ubuntu5+esm13
- 7:6.1.1-3ubuntu5+esm15
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ffmpeg Ubuntu:26.10
- Versions
- 7:8.0.1-3ubuntu2
- 7:8.1-3ubuntu3
- 7:8.1.2-2ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ffmpeg Ubuntu:Pro:26.04:LTS
- Versions
- 7:7.1.1-1ubuntu4
- 7:7.1.2-1ubuntu3
- 7:7.1.2-1ubuntu4
- 7:7.1.3-1ubuntu1
- 7:8.0.1-2ubuntu1
- 7:8.0.1-3ubuntu1
- 7:8.0.1-3ubuntu2
- 7:8.0.1-3ubuntu2+esm1
- 7:8.0.1-3ubuntu2+esm3
- 7:8.0.1-3ubuntu2+esm4
- 7:8.0.1-3ubuntu2+esm5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23896
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/9a3202a98b2e095b54dd784c3e01a09a676fc3fa
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/705890061467ad550ecc1dad5eea07f28ccfb43e
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/c22667d0fd7916a33fd3e79685b7246fc48f1a62
- https://www.vulncheck.com/advisories/ffmpeg-uninitialized-heap-memory-read-in-screenpresso-decoder
- https://nvd.nist.gov/vuln/detail/CVE-2026-70630