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CVE-2025-59730

Heap-buffer-overflow write in FFmpeg SANM decoding due to lack of bounds-checking in old_codec48

5.7 MediumFix available

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.

Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.

This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.

process_frame_obj initializes the buffers based on the frame resolution:

We recommend upgrading to version 8.0 or beyond.

Attack profile

How easy it is to exploit

Attack vector
Adjacent network
Complexity
High
Privileges needed
Low
User interaction
Passive

What an attacker can affect

Confidentiality
Low
Integrity
High
Availability
None

Exploit likelihood

0.16%Up 0.1 points since Oct 6, 2025
90%50%10%1%

What each source reports

CVE List Score used 5.7

Heap-buffer-overflow write in FFmpeg SANM decoding due to lack of bounds-checking in old_codec48

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.

Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.

This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.

process_frame_obj initializes the buffers based on the frame resolution:

We recommend upgrading to version 8.0 or beyond.

Record
CVE-2025-59730
CVSS 4.0
5.7 MediumCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N
Weakness
CWE-787
Updated
2026-11-02
EUVDEUVD-2025-32191 5.7

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.

Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.

This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.

process_frame_obj initializes the buffers based on the frame resolution:

We recommend upgrading to version 8.0 or beyond.

Record
EUVD-2025-32191
CVSS 4.0
5.7 MediumCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-3x55-g2vp-hv3w 5.7

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the...

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.

Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.

This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.

process_frame_obj initializes the buffers based on the frame resolution:

We recommend upgrading to version 8.0 or beyond.

Record
GHSA-3x55-g2vp-hv3w
CVSS 4.0
5.7 MediumCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-787
Updated
2026-11-02
NVD 5.7

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.

Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.

This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.

process_frame_obj initializes the buffers based on the frame resolution:

We recommend upgrading to version 8.0 or beyond.

Record
CVE-2025-59730
CVSS 4.0
5.7 MediumCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-787
Updated
2026-11-02
OSVALPINE-CVE-2025-59730 5.7

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.

Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.

This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.

process_frame_obj initializes the buffers based on the frame resolution:

We recommend upgrading to version 8.0 or beyond.

Record
ALPINE-CVE-2025-59730
CVSS 4.0
5.7 MediumCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-03
OSV 5.7

Heap-buffer-overflow write in FFmpeg SANM decoding due to lack of bounds-checking in old_codec48

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.

Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.

This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.

process_frame_obj initializes the buffers based on the frame resolution:

We recommend upgrading to version 8.0 or beyond.

Record
CVE-2025-59730
CVSS 4.0
5.7 MediumCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N
Weakness
CWE-787
Updated
2026-11-02
OSVUBUNTU-CVE-2025-59730 5.7

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it. Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution. This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow. process_frame_obj initializes the buffers based on the frame resolution: We recommend upgrading to version 8.0 or beyond.

Record
UBUNTU-CVE-2025-59730
CVSS 4.0
5.7 MediumCVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N
Updated
2026-11-02
OSVDEBIAN-CVE-2025-59730 No score

When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it. Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution. This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow. process_frame_obj initializes the buffers based on the frame resolution: We recommend upgrading to version 8.0 or beyond.

Record
DEBIAN-CVE-2025-59730
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ffmpeg
Alpine:v3.23
 before 8.0-r0
8.0-r0
ffmpeg
Alpine:v3.24
 before 8.0-r0
8.0-r0
libav
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
6:0.8.7-1ubuntu26:9.10-1ubuntu16:9.10-1ubuntu26:9.10-1ubuntu56:9.10-1ubuntu6
Show 9 moreShow less
6:9.10-1ubuntu76:9.11-2ubuntu16:9.11-2ubuntu26:9.13-0ubuntu0.14.04.16:9.14-0ubuntu0.14.04.16:9.16-0ubuntu0.14.04.16:9.18-0ubuntu0.14.04.16:9.20-0ubuntu0.14.04.16:9.20-0ubuntu0.14.04.1+esm1
 None known

History

History
RecordedChangedSources
affected, aliases, facts, referencesOSV
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-59730 is a medium vulnerability (CVSS 5.7) in Ffmpeg, published October 6, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 5th percentile. Fixed in ffmpeg 8.0-r0.

References

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