Is CVE-2026-40962 in the CISA KEV catalog?

No. CVE-2026-40962 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-40962?

CVE-2026-40962 has a CVSS v3 base score of 4.9 (MEDIUM).

What is the EPSS score for CVE-2026-40962?

CVE-2026-40962 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40962?

Upgrade ffmpeg on debian 12 to 7:5.1.9-0+deb12u1 or later. Fixes are available for 38 affected products.

CVE & CISA-KEV Catalog

CVE-2026-40962

MEDIUM

4.9

CVSS v3

NVD

Description

FFmpeg before 8.1 has an integer overflow and resultant out-of-bounds write via CENC (Common Encryption) subsample data to libavformat/mov.c.

CWE-190Integer Overflow

How to fix

Remediation Available

ffmpegDebian

Fixed in:7:5.1.9-0+deb12u1CVE-2026-40962

Fixed in:7:7.1.4-0+deb13u1CVE-2026-40962

Fixed in:7:8.1-1CVE-2026-40962

ffmpegUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavcodec-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavcodec-extraUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavcodec-extra58Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavcodec-extra60Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavcodec58Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavcodec60Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavdevice-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavdevice58Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavdevice60Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavfilter-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavfilter-extraUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavfilter-extra7Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavfilter-extra9Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavfilter7Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavfilter9Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavformat-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavformat-extraUbuntu

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavformat-extra58Ubuntu

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavformat-extra60Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavformat58Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavformat60Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavresample-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

libavresample4Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

libavutil-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libavutil56Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libavutil58Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libpostproc-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libpostproc55Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libpostproc57Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libswresample-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libswresample3Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libswresample4Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libswscale-devUbuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

libswscale5Ubuntu

Fixed in:7:4.2.7-0ubuntu0.1+esm13USN-8469-1

Fixed in:7:4.4.2-0ubuntu0.22.04.1+esm12USN-8469-1

libswscale7Ubuntu

Fixed in:7:6.1.1-3ubuntu5+esm10USN-8469-1

FFmpegWindows application

Affected:8.1Fixed in:8.1Gyan

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Patch1

code.ffmpeg.org

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-20.