CVE-2017-8906: An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in Multi

Q: How do I fix CVE-2017-8906?

x265 high efficiency video coding: upgrade to newer than 2.4. Exact commands for each OS are on this page.

Q: Is CVE-2017-8906 being exploited?

CVE-2017-8906 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-2017-8906 affect?

CVE-2017-8906 affects x265 high efficiency video coding. Severity is medium (CVSS 5.5). An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in MulticoreWare x265 through 2.4, as used by the x265_encoder_encode dependency in libbpg and other products. A small picture can cause a

Q: How urgent is CVE-2017-8906?

Priority 38/100. Public exploit reference

Routine

MEDIUM 5.5UPGRADE

CVE-2017-8906 is a medium-severity flaw (CVSS 5.5) affecting x265 high efficiency video coding. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in MulticoreWare x265 through 2.4, as used by the x265_encoder_encode dependency in libbpg and other products. A small picture can cause an integer underflow, which leads to a Denial of Service in the process of encoding.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-191
Published	2017-05-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: multicorewareinc

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

Am I affected?

Timeline

2017-05-11 20:29 UTCPublished CVE record published
2026-06-17 01:27 UTCUpdated Record last modified

multicorewareinc x265 high efficiency video coding UPGRADE

Affected: <= 2.4

Fixed in: newer than 2.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy x265-high-efficiency-video-coding || rpm -q x265-high-efficiency-video-coding || x265-high-efficiency-video-coding --version

2. UPGRADE to newer than 2.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade x265-high-efficiency-video-coding

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade x265-high-efficiency-video-coding

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-2017-8906?

x265 high efficiency video coding: upgrade to newer than 2.4. Exact commands for each OS are on this page.

Is CVE-2017-8906 being exploited?

CVE-2017-8906 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-2017-8906 affect?

CVE-2017-8906 affects x265 high efficiency video coding. Severity is medium (CVSS 5.5). An integer underflow vulnerability exists in pixel-a.asm, the x86 assembly code for planeClipAndMax() in MulticoreWare x265 through 2.4, as used by the x265_encoder_encode dependency in libbpg and other products. A small picture can cause a

How urgent is CVE-2017-8906?

Priority 38/100. Public exploit reference

References

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