What is CVE-2017-7961?

CVE-2017-7961 is a high-severity vulnerability in GNOME Libcroco, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-04-19.

How severe is CVE-2017-7961?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2017-7961 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in GNOME Libcroco

CVE-2017-7961

The cr_tknzr_parse_rgb function in cr-tknzr.c in libcroco 0.6.11 and 0.6.12 has an "outside the range of representable values of type long" undefined behavior issue, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted CSS file. NOTE: third-party analysis reports "This is not a security issue in my view. The conversion surely is truncating the double into a long value, but there is no impact as the value is one of the RGB components.

Vulnerability class: Buffer Overflow

Published 2017-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (79.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

GNOME Libcroco — versions 0.6.11, 0.6.12

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

andir/nixos-issue-db-example

References

git.gnome.org/browse/libcroco/commit/ (Patch, Third Party Advisory, Issue Tracking)
security.gentoo.org/glsa/201707-13 (vendor-advisory, Third Party Advisory)
openwall.com/lists/oss-security/2017/04/24/2 (Patch, Mailing List, Third Party Advisory)
bugzilla.suse.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
blogs.gentoo.org/ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/ (Exploit, Patch, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2019-06/msg00043.html (vendor-advisory)

Frequently asked questions

What is CVE-2017-7961?: CVE-2017-7961 is a high-severity vulnerability in GNOME Libcroco, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-04-19.
How severe is CVE-2017-7961?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2017-7961 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.