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CVE-2020-23922

24
FAUCET Score

CVE-2020-23922 is a heap-based buffer over-read vulnerability in giflib through version 5.1.4, specifically within the DumpScreen2RGB function in gif2rgb.c, affecting products like Apache BookKeeper and giflib itself. Rated 7.1 HIGH, this flaw can be triggered with low attack complexity through user interaction, potentially leading to high confidentiality and availability impacts. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.1.4CPE matchmatch criteria
cpe:2.3:a:giflib_project:giflib:*:*:*:*:*:*:*:*
4.12.1CPE matchmatch criteria
cpe:2.3:a:apache:bookkeeper:4.12.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 81st percentile among its peer group of 11,615 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: giflib

Vendor Advisories (1)

redhatCVE-2020-23922Low

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

Apr 22, 2021

References

cwe.mitre.org / data/definitions/126.html
Technical DescriptionThird Party Advisory
lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
sourceforge.net / p/giflib/bugs/151
ExploitThird Party Advisory