How severe is CVE-2017-12780?

CVE-2017-12780 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-12780 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12780?

CVE-2017-12780 primarily affects Matroska Libebml2. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-12780?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-12780 published?

CVE-2017-12780 was published on 2017-11-10 and last updated on 2026-06-17.

CVE-2017-12780

CVE-2017-12780 is a medium-severity vulnerability in Matroska Libebml2 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-416
Affected product: Matroska Libebml2
Published: 2017-11-10
Last modified: 2026-06-17

Description

The ReadData function in ebmlstring.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of service (invalid free and application crash) via a crafted mkv file.

Frequently asked questions

What is CVE-2017-12780?: The ReadData function in ebmlstring.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of service (invalid free and application crash) via a crafted mkv file.
How severe is CVE-2017-12780?: CVE-2017-12780 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-12780 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12780?: CVE-2017-12780 primarily affects Matroska Libebml2. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-12780?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-12780 published?: CVE-2017-12780 was published on 2017-11-10 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:matroska:libebml2:*:*:*:*:*:*:*:*
cpe:2.3:a:matroska:mkclean:0.8.9:*:*:*:*:*:*:*
cpe:2.3:a:matroska:mkvalidator:0.5.1:*:*:*:*:*:*:*

More vulnerabilities in Matroska Libebml2

CVE-2017-12802 — Medium (CVSS 6.5): The EBML_IntegerValue function in ebmlnumber.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial…
CVE-2017-12801 — Medium (CVSS 6.5): The UpdateDataSize function in ebmlmaster.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of…
CVE-2017-12800 — Medium (CVSS 6.5): The EBML_FindNextElement function in ebmlmain.c in libebml2 through 2012-08-26 allows remote attackers to cause a…
CVE-2017-12783 — Medium (CVSS 6.5): The ReadDataFloat function in ebmlnumber.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of…
CVE-2017-12782 — Medium (CVSS 6.5): The ReadData function in ebmlmaster.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial of…
CVE-2017-12781 — Medium (CVSS 6.5): The EBML_BufferToID function in ebmlelement.c in libebml2 through 2012-08-26 allows remote attackers to cause a denial…

All CVEs affecting Matroska Libebml2 →

Other CWE-416 (Use After Free) vulnerabilities

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CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

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