How severe is CVE-2017-12803?

CVE-2017-12803 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-2017-12803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12803?

CVE-2017-12803 affects Matroska Mkclean. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12803?

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

When was CVE-2017-12803 published?

CVE-2017-12803 was published on 2017-11-10 and last updated on 2026-06-17.

CVE-2017-12803

CVE-2017-12803 is a medium-severity vulnerability in Matroska Mkclean 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Matroska Mkclean
Published: 2017-11-10
Last modified: 2026-06-17

Description

The Node_ValidatePtr function in corec/corec/node/node.c in mkclean 0.8.9 allows remote attackers to cause a denial of service (assert fault) via a crafted mkv file.

Frequently asked questions

What is CVE-2017-12803?: The Node_ValidatePtr function in corec/corec/node/node.c in mkclean 0.8.9 allows remote attackers to cause a denial of service (assert fault) via a crafted mkv file.
How severe is CVE-2017-12803?: CVE-2017-12803 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-2017-12803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12803?: CVE-2017-12803 affects Matroska Mkclean. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-12803 published?: CVE-2017-12803 was published on 2017-11-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:matroska:mkclean:0.8.9:*:*:*:*:*:*:*

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Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →