How severe is CVE-2018-18829?

CVE-2018-18829 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-2018-18829 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18829?

CVE-2018-18829 affects Libav. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-18829?

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

When was CVE-2018-18829 published?

CVE-2018-18829 was published on 2018-10-30 and last updated on 2026-06-17.

CVE-2018-18829

CVE-2018-18829 is a medium-severity vulnerability in Libav 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: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Libav
Published: 2018-10-30
Last modified: 2026-06-17

Description

There exists a NULL pointer dereference in ff_vc1_parse_frame_header_adv in vc1.c in Libav 12.3, which allows attackers to cause a denial-of-service through a crafted aac file.

Frequently asked questions

What is CVE-2018-18829?: There exists a NULL pointer dereference in ff_vc1_parse_frame_header_adv in vc1.c in Libav 12.3, which allows attackers to cause a denial-of-service through a crafted aac file.
How severe is CVE-2018-18829?: CVE-2018-18829 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-2018-18829 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18829?: CVE-2018-18829 affects Libav. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-18829?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18829 published?: CVE-2018-18829 was published on 2018-10-30 and last updated on 2026-06-17.

References

https://bugzilla.libav.org/show_bug.cgi?id=1136

Affected products (1)

cpe:2.3:a:libav:libav:12.3:*:*:*:*:*:*:*

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