giflib: out-of-bounds read in DumpScreen2RGB() in gif2rgb.c in gif2rgb tool
Published Apr 21, 2021
7.1
HIGHCVSS 3.1
EPSS 2.24%
Description
An issue was discovered in giflib through 5.1.4. DumpScreen2RGB in gif2rgb.c has a heap-based buffer over-read.
Affected products
No data.
Configuration 1
- ≤ 5.1.4
Configuration 2
- 4.12.1
No data.
Red Hat AI Inference Server 3.2
rhaiis/model-opt-cuda-rhel9:1772713830
Fixed · RHSA-2026:4128
Red Hat Enterprise Linux 6
giflib
Out of support scope
Red Hat Enterprise Linux 7
giflib
Out of support scope
Red Hat Enterprise Linux 8
giflib
Not affected
Red Hat Enterprise Linux 9
giflib
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat AI Inference Server 3.2 | rhaiis/model-opt-cuda-rhel9:1772713830 | Fixed | RHSA-2026:4128 |
| Red Hat Enterprise Linux 6 | giflib | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | giflib | Out of support scope | n/a |
| Red Hat Enterprise Linux 8 | giflib | Not affected | n/a |
| Red Hat Enterprise Linux 9 | giflib | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This Moderate impact flaw affects the `gif2rgb` utility, not the `giflib` library. A missing bounds check in 'DumpScreen2RGB()' can lead to an out-of-bounds read when processing a crafted GIF file, causing the tool to crash. Exploitation requires local access and user interaction.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.24% (0.02237) | 82.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.23% (0.02227) | 80.36th | v5 (v2026.06.15) |
| May 3, 2026 | 1.62% (0.01624) | 81.94th | v4 (v2025.03.14) |
| Aug 17, 2025 | 2.88% (0.02882) | 85.78th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.38% (0.01377) | 78.50th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.64% (0.02639) | 76.15th | v4 (v2025.03.14) |
| Mar 20, 2025 | 1.38% (0.01377) | 78.58th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.39% (0.02394) | 83.93th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.12% (0.00117) | 47.31th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.07% (0.00068) | 28.65th | v3 (v2023.03.01) |
| Mar 8, 2023 | 0.06% (0.00063) | 24.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 10.97th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.25% (0.01246) | 67.45th | v2 (v2022.01.01) |
| Oct 27, 2022 | 1.25% (0.01246) | 66.79th | v2 (v2022.01.01) |
| Jul 11, 2022 | 1.02% (0.01018) | 38.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.51% (0.01512) | 50.79th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v1 |
| Jan 6, 2022 | 3.63% (0.03630) | 71.48th | v1 |
| Sep 1, 2021 | 0.83% (0.00833) | 57.50th | v1 |
| Jun 30, 2021 | 0.83% (0.00833) | 0.00th | v1 |
| Jun 29, 2021 | 0.62% (0.00624) | 0.00th | v1 |
| Apr 27, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (8)
- https://access.redhat.com/security/cve/CVE-2020-23922 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1953004 Issue Tracking
- https://cwe.mitre.org/data/definitions/126.html x_refsource_MISCTechnical DescriptionThird Party Advisory
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2020-23922
- https://sourceforge.net/p/giflib/bugs/151/ x_refsource_MISCExploitThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-23922
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-23922 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1953004 | Issue Tracking | |
| https://cwe.mitre.org/data/definitions/126.html | x_refsource_MISCTechnical DescriptionThird Party Advisory | |
| https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E | mailing-listx_refsource_MLIST | |
| https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E | mailing-listx_refsource_MLIST | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-23922 | ||
| https://sourceforge.net/p/giflib/bugs/151/ | x_refsource_MISCExploitThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2020-23922 |
Change history (0)
No recorded changes yet.