A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file.
| Reporter | Title | Published | Views | Family All 57 |
|---|---|---|---|---|
 | CVE-2021-40633 | 14 Jun 202211:15 | – | attackerkb |
 | Amazon Linux 2 : giflib, --advisory ALAS2-2025-2998 (ALAS-2025-2998) | 16 Sep 202500:00 | – | nessus |
| Azure Linux 3.0 Security Update: giflib (CVE-2021-40633) | 22 Jan 202600:00 | – | nessus |
| EulerOS 2.0 SP9 : giflib (EulerOS-SA-2024-1485) | 8 Apr 202400:00 | – | nessus |
| EulerOS 2.0 SP9 : giflib (EulerOS-SA-2024-1506) | 8 Apr 202400:00 | – | nessus |
| SUSE SLED15: giflib-devel / giflib-devel-32bit / giflib-progs / libgif7 / etc (SUSE-SU-2024:0786-1) | 7 Mar 202400:00 | – | nessus |
| SUSE SLES12 Security Update : giflib (SUSE-SU-2024:1622-1) | 14 May 202400:00 | – | nessus |
| TencentOS Server 4: giflib (TSSA-2024:0479) | 16 Jun 202500:00 | – | nessus |
| Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 : GIFLIB vulnerabilities (USN-6824-1) | 10 Jun 202400:00 | – | nessus |
| Linux Distros Unpatched Vulnerability : CVE-2021-40633 | 5 Mar 202500:00 | – | nessus |
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18 Feb 2026 09:02Current
7.9High risk
Vulners AI Score7.9
CVSS 25.1
CVSS 3.18.8
EPSS0.01533