CVE-2011-0531Vlc Media Player Vulnerability
demux/mkv/mkv.hpp in the MKV demuxer plugin in VideoLAN VLC media player 1.1.6.1 and earlier allows remote attackers to cause a denial of service (crash) and execute arbitrary commands via a crafted MKV (WebM or Matroska) file that triggers memory corruption, related to "class…
Published Feb 7, 2011 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2011-0531, DSA-2159-1
Key Facts
Patch immediately- CVE-2011-0531 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Vlc Media Player (Videolan), vlc (debian).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 42% probability of exploitation in the next 30 days.
- Fixed versions are available, including Vlc Media Player 1.1.6.1, vlc 1.1.3-1squeeze3, vlc 1.1.7-1.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
42%
Higher than 98.6% of all scored CVEs
Exploit maturity
Weaponized
ATLAS score
59/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Weaponized
Public exploit code
2
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
demux/mkv/mkv.hpp in the MKV demuxer plugin in VideoLAN VLC media player 1.1.6.1 and earlier allows remote attackers to cause a denial of service (crash) and execute arbitrary commands via a crafted MKV (WebM or Matroska) file that triggers memory corruption, related to "class mismatching" and the MKV_IS_ID macro.
Affected Products
80 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Vlc Media PlayerVideolan | 0.1.99b, 0.1.99e, 0.1.99f, 0.1.99g, 0.1.99h, 0.1.99i, 0.2.0, 0.2.60 | 1.1.6.1 |
| vlcdebian | See advisory | 1.1.7-1 |
Patched Releases
Vlc Media Player
1.1.6.1
vlc
1.1.3-1squeeze3, 1.1.7-1
Timeline
Publicly disclosed
Feb 7, 2011
Last updated
Aug 4, 2026
Weakness Type
- CWE-20 Improper Input Validation
References
- advisorysecurity-tracker.debian.org · CVE-2011-0531
- advisory43131
- patch[oss-security] 20110131 CVE request: code execution in VLC media player
- patch[oss-security] 20110131 Re: CVE request: code execution in VLC media player
- patchvideolan.org · sa1102.html
FAQ
Common Questions.
demux/mkv/mkv.hpp in the MKV demuxer plugin in VideoLAN VLC media player 1.1.6.1 and earlier allows remote attackers to cause a denial of service (crash) and execute arbitrary commands via a crafted MKV (WebM or Matroska) file that triggers memory corruption, related to "class mismatching" and the MKV_IS_ID macro.
Affected: Vlc Media Player (Videolan) versions 0.1.99b, 0.1.99e, 0.1.99f, 0.1.99g, 0.1.99h, 0.1.99i, 0.2.0, 0.2.60; vlc (debian). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Vlc Media Player 1.1.6.1, vlc 1.1.3-1squeeze3, vlc 1.1.7-1.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2011-0531 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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