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CVE Record

CVE-2012-2799: Unspecified vulnerability in libavcodec/wmalosslessdec.c in FFmpeg before 0.11 has unknown impact and attac...

Unspecified vulnerability in libavcodec/wmalosslessdec.c in FFmpeg before 0.11 has unknown impact and attack vectors, related to the "put bit buffer when num_saved_bits is reset."

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's Takeunknown

Analyst readout for executives and security teams

Plain-English summary

FFmpeg before 0.11 contained an unspecified flaw in its WMA Lossless decoder. The public record does not define the business impact or attack path. Risk is most relevant where old FFmpeg builds process media files from users, partners, email, web uploads, or automated ingest pipelines.

Executive priority

Treat this as a legacy media-processing exposure, not an emergency based on current evidence. Prioritize organizations that accept or transform external media files, because parser flaws can affect user-facing and automated ingest services.

Technical view

The issue is in libavcodec/wmalosslessdec.c and relates to bit-buffer handling when num_saved_bits is reset. The source bundle identifies FFmpeg before 0.11 but provides no CVSS, CWE, concrete impact, affected CPEs, or exploit mechanics.

Likely exposure

Likely exposure is legacy FFmpeg or bundled libavcodec older than 0.11, especially systems decoding WMA Lossless or other untrusted media. Downstream products are not enumerated in the supplied sources.

Exploitation context

CISA KEV is false, and the supplied sources do not cite active exploitation or a public exploit. The CVE itself states unknown impact and attack vectors, so exploitation context remains incomplete.

Researcher notes

Evidence is sparse. The public record ties the fix to FFmpeg 0.11 and a specific source file, but does not provide impact, root-cause detail, affected distributions, or reliable exploit status. Avoid inferring more than the record supports.

Mitigation direction

  • Identify FFmpeg and libavcodec versions across servers, applications, containers, and appliances.
  • Upgrade FFmpeg to 0.11 or later, or confirm a vendor backport includes this fix.
  • Check vendor or distribution advisories for supported package-specific remediation guidance.
  • Restrict untrusted media processing on legacy FFmpeg systems until remediation is confirmed.

Validation and detection

  • Verify runtime FFmpeg or libavcodec reports a fixed version or patched vendor build.
  • Review SBOMs and application manifests for statically bundled FFmpeg copies.
  • Confirm media ingest paths no longer use vulnerable legacy binaries or libraries.
  • Check crash and error telemetry around WMA Lossless decoding for unusual instability.
Prepared
Confidence
medium
Sources
5

Public sources used

Based on public source material and reviewed before publication.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2012-2799 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.