CVE-2019-9133: When processing subtitles format media file, KMPlayer version 2018.12.24.14 or lower doesn't check object size

Q: How do I fix CVE-2019-9133?

kmplayer: upgrade to newer than 2018.12.24.14; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-9133 being exploited?

CVE-2019-9133 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-2019-9133 affect?

CVE-2019-9133 affects kmplayer, fedora. Severity is medium (CVSS 5.5). When processing subtitles format media file, KMPlayer version 2018.12.24.14 or lower doesn't check object size correctly, which leads to integer underflow then to memory out-of-bound read/write. An attacker can exploit this issue by enticin

Q: How urgent is CVE-2019-9133?

Priority 39/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADEMITIGATE

CVE-2019-9133 is a medium-severity flaw (CVSS 5.5) affecting kmplayer, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When processing subtitles format media file, KMPlayer version 2018.12.24.14 or lower doesn't check object size correctly, which leads to integer underflow then to memory out-of-bound read/write. An attacker can exploit this issue by enticing an unsuspecting user to open a malicious file.

Why this priority

No elevated risk signals yet

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	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-190, CWE-191
Published	2019-04-09
Last modified	2026-06-17

Publisher (CNA): KrCERT/CC · Vendor: fedoraproject · kmplayer

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

Am I affected?

Timeline

2019-04-09 18:29 UTCPublished CVE record published
2026-06-17 02:43 UTCUpdated Record last modified

kmplayer kmplayer UPGRADE

Affected: <= 2018.12.24.14

Fixed in: newer than 2018.12.24.14

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2018.12.24.14 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kmplayer

Note

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

fedoraproject fedora MITIGATE

Affected: 29 · 30

Fixed in: no fixed release known

Safe to downgrade to: a release before 29

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2019-9133?

kmplayer: upgrade to newer than 2018.12.24.14; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-9133 being exploited?

CVE-2019-9133 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-2019-9133 affect?

CVE-2019-9133 affects kmplayer, fedora. Severity is medium (CVSS 5.5). When processing subtitles format media file, KMPlayer version 2018.12.24.14 or lower doesn't check object size correctly, which leads to integer underflow then to memory out-of-bound read/write. An attacker can exploit this issue by enticin

How urgent is CVE-2019-9133?

Priority 39/100. No elevated risk signals yet.

Related CVEs

CVE-2024-41200 MEDIUM 5.5 DOWNGRADE A segmentation fault in KMPlayer v4.2.2.65 allows attackers to cause a Denial of Service (DoS) via a crafted A
CVE-2023-1745 MEDIUM 5.3 DOWNGRADE A vulnerability, which was classified as problematic, has been found in KMPlayer 4.2.2.73
CVE-2019-17259 HIGH 7.8 DOWNGRADE KMPlayer 4.2.2.31 allows a User Mode Write AV starting at utils!src_new+0x000000000014d6ee.
CVE-2018-5200 HIGH 7.8 UPGRADE KMPlayer 4.2.2.15 and earlier have a Heap Based Buffer Overflow Vulnerability

References

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