In mpc8_read_header in libavformat/mpc8.c in Libav 12.3, an input file can result in an avio_seek infinite loop and hang, with 100% CPU con…

published 2019-07-30 7y ago modified 2026-06-17 4mo ago also EUVD-2019-5635

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits: 0; none known

In mpc8_read_header in libavformat/mpc8.c in Libav 12.3, an input file can result in an avio_seek infinite loop and hang, with 100% CPU consumption. Attackers could leverage this vulnerability to cause a denial of service via a crafted file.

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Exploit prediction

1.02% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

bugzilla.libav.org https://bugzilla.libav.org/show_bug.cgi?id=1159 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	2.0	7.1	AV:N/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-835 Loop with Unreachable Exit Condition

References

bugzilla.libav.org /show_bug.cgi?id=1159
exploit, issue-tracking, third-party-advisory
lists.debian.org /debian-lts-announce/2019/09/msg00000.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2019-14442
NVD CVE-2019-14442

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