CVE-2025-7700 | Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)

A flaw was found in FFmpeg’s ALS audio decoder, where it does not properly check for memory allocation failures. This can cause the application to crash when processing certain malformed audio files. While it does not lead to data theft or system control, it can be used to disrupt services and cause a denial of service.

Published: 2025-11-07 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-7700 is rated Low Risk (30.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.09%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-7700

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-09 0.03% 0.09% +0.06%
2 2025-11-08 — 0.03% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-7700

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2025-7700

GitHub Security Advisory for CVE-2025-7700

GHSA-p7g8-g57p-r8qx · Severity: medium — A flaw was found in FFmpeg’s ALS audio decoder, where it does not properly check for memory...

OS Trackers for CVE-2025-7700

vendor priority summary link
debian not yet assigned CVE-2025-7700 not yet assigned priority: Debian including 1 source packages (ffmpeg), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-7700
redhat medium — https://access.redhat.com/security/cve/CVE-2025-7700
suse medium CVE-2025-7700 severity moderate: SUSE including 157 source package names (0.3.2-1.2:libavcodec58_134-4.4.6-150600.13.30.1, 0.3.2-1.2:libavformat58_76-4.4.6-150600.13.30.1, …), 470 product×package rows across 38 product lines (Container containers/lmcache-vllm-openai, Container containers/open-webui, … (38 product lines)): Fixed 461, First Fixed 9. https://www.suse.com/security/cve/CVE-2025-7700/
ubuntu medium CVE-2025-7700 medium priority: Ubuntu including 2 source packages (ffmpeg, libav), 14 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 4, released 4, ignored 3, needs-triage 2, not-affected 1. https://ubuntu.com/security/CVE-2025-7700

Affected software / configurations for CVE-2025-7700

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-7700

cvelogic Threat Intelligence