What is CVE-2017-18242?

CVE-2017-18242 is a medium-severity vulnerability in Libav, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2018-03-22.

How severe is CVE-2017-18242?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Out-of-bounds Read in Libav

CVE-2017-18242

The apply_dependent_coupling function in libavcodec/aacdec.c in Libav 12.2 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted aac file.

Vulnerability class: Buffer Overflow

Published 2018-03-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: -0.000

Affected products

Libav — versions 12.2

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

bugzilla.libav.org/show_bug.cgi (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-18242?: CVE-2017-18242 is a medium-severity vulnerability in Libav, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2018-03-22.
How severe is CVE-2017-18242?: Medium severity. CVSS v3 base score is 6.5 out of 10.