What is CVE-2017-9051?

CVE-2017-9051 is a critical-severity vulnerability in Libav, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2017-05-18.

How severe is CVE-2017-9051?

Critical severity. CVSS v3 base score is 9.8 out of 10.

NULL pointer dereference in Libav

CVE-2017-9051

libav before 12.1 is vulnerable to an invalid read of size 1 due to NULL pointer dereferencing in the nsv_read_chunk function in libavformat/nsvdec.c.

Published 2017-05-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (78.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Libav

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

bugzilla.libav.org/show_bug.cgi (Issue Tracking)
www.securityfocus.com/bid/98548 (vdb-entry)
github.com/libav/libav/commit/fe6eea99efac66839052af547426518efd970b24 (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-9051?: CVE-2017-9051 is a critical-severity vulnerability in Libav, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2017-05-18.
How severe is CVE-2017-9051?: Critical severity. CVSS v3 base score is 9.8 out of 10.