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Fencer Vulns
high 7.1

CVE-2020-23922 json

An issue was discovered in giflib through 5.1.4.

published 2021-04-21 5 y ago modified 2026-07-30 3 mo ago also EUVD-2020-16659 , JLSEC-2026-815

cvss
7.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

An issue was discovered in giflib through 5.1.4. DumpScreen2RGB in gif2rgb.c has a heap-based buffer over-read.

Patch / fix

  • julia Giflib_jll 5.2.1+0
  • giflib Debian 14, Debian 13 5.2.2-1

debian advisories DEBIAN-CVE-2020-23922

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-23922 updated cvss 7.1

giflib: out-of-bounds read in DumpScreen2RGB() in gif2rgb.c in gif2rgb tool

  • Red Hat Enterprise Linux 6 giflib, giflib-utils Red Hat Enterprise Linux 7 giflib, giflib-utils
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 giflib
    affected: no fix available
  • Red Hat AI Inference Server 3.2 rhaiis 1772713830
    fixed: vendor fix RHSA-2026:4128
  • Red Hat Enterprise Linux 8 giflib
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.24% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • sourceforge.net https://sourceforge.net/p/giflib/bugs/151/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:N/A:P
OSV 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Giflib_jll
<5.2.1+0
5.2.1+0

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.