CVE-2011-0531

CVE-2011-0531 is a critical-severity vulnerability in Videolan Vlc Media Player with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 42% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

• Severity: Critical (CVSS 2.0 base score 9.3)
• EPSS exploit prediction: 42% (99th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Videolan Vlc Media Player
• Published: 2011-02-07
• Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2011-0531?

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.

How severe is CVE-2011-0531?

CVE-2011-0531 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-0531 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 42% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0531?

CVE-2011-0531 primarily affects Videolan Vlc Media Player. In total, 69 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0531?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-0531 published?

CVE-2011-0531 was published on 2011-02-07 and last updated on 2026-06-16.

References

• http://git.videolan.org/?p=vlc.git%3Ba=commit%3Bh=59491dcedffbf97612d2c572943b56ee4289dd07
• http://osvdb.org/70698
• http://secunia.com/advisories/43131
• http://secunia.com/advisories/43242
• http://www.debian.org/security/2011/dsa-2159
• http://www.openwall.com/lists/oss-security/2011/01/31/4
• http://www.openwall.com/lists/oss-security/2011/01/31/8
• http://www.securityfocus.com/bid/46060
• http://www.securitytracker.com/id?1025018
• http://www.videolan.org/security/sa1102.html
• http://www.vupen.com/english/advisories/2011/0363
• https://exchange.xforce.ibmcloud.com/vulnerabilities/65045
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12415

Affected products (69)

• cpe:2.3:a:videolan:vlc_media_player:*:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.1.99b:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.1.99e:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.1.99f:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.1.99g:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.1.99h:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.1.99i:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.60:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.61:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.62:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.63:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.70:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.71:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.72:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.73:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.80:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.81:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.82:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.83:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.90:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.91:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.2.92:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.4.3:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.4.4:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.4.5:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.4.6:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.5.2:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.5.3:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:videolan:vlc_media_player:0.7.0:*:*:*:*:*:*:*

More vulnerabilities in Videolan Vlc Media Player

• CVE-2008-0296 — Critical (CVSS 10.0): Heap-based buffer overflow in the libaccess_realrtsp plugin in VideoLAN VLC Media Player 0.8.6d and earlier on Windows…
• CVE-2023-47359 — Critical (CVSS 9.8): Videolan VLC prior to version 3.0.20 contains an incorrect offset read that leads to a Heap-Based Buffer Overflow in…
• CVE-2019-13962 — Critical (CVSS 9.8): lavc_CopyPicture in modules/codec/avcodec/video.c in VideoLAN VLC media player through 3.0.7 has a heap-based buffer…
• CVE-2019-12874 — Critical (CVSS 9.8): An issue was discovered in zlib_decompress_extra in modules/demux/mkv/util.cpp in VideoLAN VLC media player 3.x through…
• CVE-2017-10699 — Critical (CVSS 9.8): avcodec 2.2.x, as used in VideoLAN VLC media player 2.2.7-x before 2017-06-29, allows out-of-bounds heap memory write…
• CVE-2016-5108 — Critical (CVSS 9.8): Buffer overflow in the DecodeAdpcmImaQT function in modules/codec/adpcm.c in VideoLAN VLC media player before 2.2.4…

All CVEs affecting Videolan Vlc Media Player →

Other CWE-20 (Improper Input Validation) vulnerabilities

• CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
• CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
• CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
• CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →