CVE-2025-8585Public exploit

Local service crash via DSS double-free

Published Aug 5, 2025 · Updated Aug 6, 2025

Double-free in Libav 12.0 through 12.3 allows local users to crash the avconv process by processing a crafted DSS file. During cleanup after DSS demuxing, avconv's main function frees the same allocation twice, causing memory corruption and an abort. A low-privileged local user must cause the command-line tool to process the crafted file; no remote service exposure is reported.

CVSS severity5.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double-free in Libav 12.0 through 12.3 allows local users to crash the avconv process by processing a crafted DSS file. During cleanup after DSS demuxing, avconv's main function frees the same allocation twice, causing memory corruption and an abort. A low-privileged local user must cause the command-line tool to process the crafted file; no remote service exposure is reported.

The record

CVE
CVE-2025-8585
Published
Aug 5, 2025
Updated
Aug 6, 2025
Vendor
Libav
Product
Libav
Classifications
CWE-119, CWE-415, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.0
  2. Affected versionversion=12.1
  3. Affected versionversion=12.2
  4. Affected versionversion=12.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Libav · Libavversion=12.0; version=12.1; version=12.2; version=12.3

Published CVSS scores

5.3Canonical Ubuntu SecurityCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-415Double Free
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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