CVE-2025-13014: Use-after-free in the Audio/Video component

Routine

HIGH 8.8UPGRADE

CVE-2025-13014 is a high-severity flaw (CVSS 8.8) affecting firefox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-416
Published	2025-11-11
Last modified	2026-10-23

Publisher (CNA): Mozilla Corporation · Vendor: mozilla

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-11 16:15 UTCPublished CVE record published
2026-10-23 22:10 UTCUpdated Record last modified

mozilla firefox UPGRADE

Affected: < 115.30.0 · < 145.0 · >= 140.0 and < 140.5.0

Fixed in: 115.30.0, 140.5.0, 145.0

Safe to downgrade to: a release before 140.0

1. Check installed version

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

2. UPGRADE to 115.30.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade firefox

Note

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

3. If no update is available yet, DOWNGRADE to a release before 140.0 (Debian / Ubuntu)

apt-cache madison firefox sudo apt install firefox=<VERSION_BEFORE_140.0> sudo apt-mark hold firefox

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list firefox sudo dnf downgrade firefox-<VERSION_BEFORE_140.0> sudo dnf versionlock add firefox

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source

sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Ubuntu 22.04 · firefox · NOT AFFECTED

Ubuntu 24.04 · firefox · NOT AFFECTED

Ubuntu 25.04 · firefox · NOT AFFECTED

Ubuntu 25.10 · firefox · NOT AFFECTED

Ubuntu 24.04 · thunderbird · NOT AFFECTED

Debian 12 · firefox-esr · FIXED · 140.5.0esr-1~deb12u1

sudo apt update && sudo apt install --only-upgrade firefox-esr dpkg --compare-versions "$(dpkg-query -W -f='${Version}' firefox-esr)" ge "140.5.0esr-1~deb12u1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · firefox-esr · FIXED · 140.5.0esr-1~deb13u1

sudo apt update && sudo apt install --only-upgrade firefox-esr dpkg --compare-versions "$(dpkg-query -W -f='${Version}' firefox-esr)" ge "140.5.0esr-1~deb13u1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · thunderbird · FIXED · 1:140.5.0esr-1~deb12u1

sudo apt update && sudo apt install --only-upgrade thunderbird dpkg --compare-versions "$(dpkg-query -W -f='${Version}' thunderbird)" ge "1:140.5.0esr-1~deb12u1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · thunderbird · FIXED · 1:140.5.0esr-1~deb13u1

sudo apt update && sudo apt install --only-upgrade thunderbird dpkg --compare-versions "$(dpkg-query -W -f='${Version}' thunderbird)" ge "1:140.5.0esr-1~deb13u1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · firefox · FIXED · firefox-140.5.0-2.el10_1

sudo dnf upgrade --advisory=RHSA-2025:21281 rpm -q firefox

RHEL 10 · thunderbird · FIXED · thunderbird-140.5.0-2.el10_1

sudo dnf upgrade --advisory=RHSA-2025:21843 rpm -q thunderbird

RHEL 10.0 Extended Update Support · firefox · FIXED · firefox-140.5.0-2.el10_0

sudo dnf upgrade --advisory=RHSA-2025:21120 rpm -q firefox

RHEL 10.0 Extended Update Support · thunderbird · FIXED · thunderbird-140.5.0-1.el10_0

sudo dnf upgrade --advisory=RHSA-2025:21844 rpm -q thunderbird

RHEL 7 Extended Lifecycle Support · firefox · FIXED · firefox-140.5.0-1.el7_9

sudo dnf upgrade --advisory=RHSA-2025:22371 rpm -q firefox

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2025-1298 · source

sudo dnf update --advisory=ALAS2023-2025-1298

Amazon Linux 2 · see advisory · FIXED · ALAS2-2025-3108 · source

sudo yum update --advisory=ALAS2-2025-3108

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-2025-13014?

firefox: upgrade to 115.30.0, 140.5.0, 145.0. Exact commands for each OS are on this page.

Is CVE-2025-13014 being exploited?

CVE-2025-13014 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-2025-13014 affect?

CVE-2025-13014 affects firefox. Severity is high (CVSS 8.8). Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.

How urgent is CVE-2025-13014?

Priority 37/100. High severity

Software pages

Mozilla Firefox vulnerabilities

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References

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