CVE-2025-8585: A vulnerability, which was classified as critical, has been found in libav up to 12.3

Q: How do I fix CVE-2025-8585?

libav: upgrade to newer than 12.3. Exact commands for each OS are on this page.

Q: Is CVE-2025-8585 being exploited?

CVE-2025-8585 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-8585 affect?

CVE-2025-8585 affects libav. Severity is medium (CVSS 5.3). A vulnerability, which was classified as critical, has been found in libav up to 12.3. Affected by this issue is the function main of the file /avtools/avconv.c of the component DSS File Demuxer. The manipulation leads to double free. Attac

Q: How urgent is CVE-2025-8585?

Priority 27/100. Public exploit reference

Routine

MEDIUM 5.3UPGRADE

CVE-2025-8585 is a medium-severity flaw (CVSS 5.3) affecting libav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability, which was classified as critical, has been found in libav up to 12.3. Affected by this issue is the function main of the file /avtools/avconv.c of the component DSS File Demuxer. The manipulation leads to double free. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The bug was initially reported by the researcher to the wrong project. This vulnerability only affects products that

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-119, CWE-415
Published	2025-08-05
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: libav

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-05 17:15 UTCPublished CVE record published
2026-06-17 10:07 UTCUpdated Record last modified

libav libav UPGRADE

Affected: <= 12.3

Fixed in: newer than 12.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libav || rpm -q libav || libav --version

2. UPGRADE to newer than 12.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libav

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libav

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-8585?

libav: upgrade to newer than 12.3. Exact commands for each OS are on this page.

Is CVE-2025-8585 being exploited?

CVE-2025-8585 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-8585 affect?

CVE-2025-8585 affects libav. Severity is medium (CVSS 5.3). A vulnerability, which was classified as critical, has been found in libav up to 12.3. Affected by this issue is the function main of the file /avtools/avconv.c of the component DSS File Demuxer. The manipulation leads to double free. Attac

How urgent is CVE-2025-8585?

Priority 27/100. Public exploit reference

Related CVEs

CVE-2025-8586 LOW 3.3 UPGRADE A vulnerability, which was classified as problematic, was found in libav up to 12.3
CVE-2025-8584 LOW 3.3 UPGRADE A vulnerability classified as problematic was found in libav up to 12.3

References

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