CVE-2019-9133

KMPlayer Subtitles parser Heap Overflow Vulnerability

MEDIUM
5.5
CVSS Score
Published: April 9, 2019 at 05:33 PM UTC
Updated: June 17, 2026 at 02:43 AM UTC
3 products affected across 3 vendorsFedoraKmplayerKMPlayer· also runs on 1 platform

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Severity
MEDIUM5.5
Exploit prediction
EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 2018.12.24.14
microsoft-windows (environment)
KMPlayer ≤ v < 2018.12.24.14
Affected range stops below 2018.12.24.14, so it looks safe — our inference, not a vendor statement

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-190CWE-191

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