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Giflib CVE-2026-23868

MEDIUM
Double Free (CWE-415)
2026-03-10 cve-assign@fb.com
Information Disclosure Giflib Giflib Project
5.1
CVSS 3.1 · Vendor: fb
View

Vulnerability Assessment

Weakness
CWE
CWE-415
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Double free prevention
Impact

CVSS 5.1 (MEDIUM). Attack vector: Local. Complexity: High. Privileges required: None. User interaction: None.
Exploit ScenarioDerived

An attacker could exploit this vulnerability to compromise the affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Giflib's image processing functions are vulnerable to denial of service through a double-free memory corruption flaw triggered during shallow copy operations in GifMakeSavedImage with improper error handling. Local attackers with crafted image files can crash applications using affected Giflib versions, though exploitation requires specific and difficult-to-achieve conditions. No patch is currently available.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 21:55 CVSS 5.1

Giflib contains a double-free vulnerability that is the result of a shallow copy in GifMakeSavedImage and incorrect error handling. The conditions needed to trigger this vulnerability are difficult but may be possible. [CVSS 5.1 MEDIUM]

RemediationAI

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Technical ContextAI · show details

Giflib contains a double-free vulnerability that is the result of a shallow copy in GifMakeSavedImage and incorrect error handling. The conditions needed to trigger this vulnerability are difficult but may be possible.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

Vendor (fb) PRIMARY 5.1 MEDIUM
AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE MEDIUM
Red Hat 7.0 HIGH

Primary rating from Vendor (fb).

CVSS VectorVendor: fb

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Patch released
Apr 09, 2026 - 20:30 nvd
Patch available
CVE Published
Mar 10, 2026 - 20:16 nvd
MEDIUM 5.1

DescriptionCVE.org

Giflib contains a double-free vulnerability that is the result of a shallow copy in GifMakeSavedImage and incorrect error handling. The conditions needed to trigger this vulnerability are difficult but may be possible.

Executive ViewAI

Why It Matters

Organizations using Giflib should be aware of moderate risk from CVE-2026-23868 rated CVSS 5.1. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 98% exploitable
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS Vendor VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact
Low

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:giflib_project:giflib:*:*:*:*:*:*:*:*

More in Giflib

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CVE-2018-11489 HIGH POC
8.8 May 26

The DGifDecompressLine function in dgif_lib.c in GIFLIB (possibly version 3.0.x), as later shipped in cgif.c in sam2p 0.
CVE-2023-48161 HIGH POC
7.1 Nov 22

Buffer Overflow vulnerability in GifLib Project GifLib v.5.2.1 allows a local attacker to obtain sensitive information v
CVE-2016-3177 CRITICAL
9.8 Jan 23

Multiple use-after-free and double-free vulnerabilities in gifcolor.c in GIFLIB 5.1.2 have unspecified impact and attack
CVE-2015-7555 MEDIUM POC
5.5 Apr 13

Heap-based buffer overflow in giffix.c in giffix in giflib 5.1.1 allows attackers to cause a denial of service (program

CVE-2023-39742 MEDIUM POC
5.5 Aug 25

giflib v5.2.1 was discovered to contain a segmentation fault via the component getarg.c. Rated medium severity (CVSS 5.5
CVE-2022-28506 MEDIUM POC
5.5 Apr 25

There is a heap-buffer-overflow in GIFLIB 5.2.1 function DumpScreen2RGB() in gif2rgb.c:298:45. Rated medium severity (CV
CVE-2018-11490 HIGH
8.8 May 26

The DGifDecompressLine function in dgif_lib.c in GIFLIB (possibly version 3.0.x), as later shipped in cgif.c in sam2p 0.
CVE-2024-45993 MEDIUM
6.5 Sep 30

Giflib Project v5.2.2 is vulnerable to a heap buffer overflow via gif2rgb. Rated medium severity (CVSS 6.5), this vulner
CVE-2019-15133 MEDIUM
6.5 Aug 17

In GIFLIB before 2019-02-16, a malformed GIF file triggers a divide-by-zero exception in the decoder function DGifSlurp

CVE-2016-3977 MEDIUM
5.5 Apr 21

Heap-based buffer overflow in util/gif2rgb.c in gif2rgb in giflib 5.1.2 allows remote attackers to cause a denial of ser

Same weakness CWE-415 – Double Free

View all
CVE-2014-0502 HIGH POC
8.8
CVE-2018-0101 CRITICAL POC
10.0
CVE-2023-25136 MEDIUM POC
6.5
CVE-2026-33824 CRITICAL POC
9.8
CVE-2014-1767 HIGH POC
7.2
CVE-2016-5768 CRITICAL POC
9.8
CVE-2016-5772 CRITICAL POC
9.8
CVE-2016-3132 CRITICAL POC
9.8

Same technique Information Disclosure

View all
CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 Fixed
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected

References

Advisories & patches
ADVISORY https://vuldb.com/?id.350178 ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:1005/ REF https://access.redhat.com/errata/RHSA-2026:16008 REF https://access.redhat.com/errata/RHSA-2026:16009 REF https://access.redhat.com/errata/RHSA-2026:16030 REF https://access.redhat.com/errata/RHSA-2026:16174 REF https://access.redhat.com/errata/RHSA-2026:19154 REF https://access.redhat.com/errata/RHSA-2026:19367 REF https://access.redhat.com/errata/RHSA-2026:19724 REF https://access.redhat.com/errata/RHSA-2026:19725 REF https://access.redhat.com/errata/RHSA-2026:25096 REF https://access.redhat.com/errata/RHSA-2026:8858 REF https://access.redhat.com/errata/RHSA-2026:8859 REF https://access.redhat.com/errata/RHSA-2026:8861 REF https://access.redhat.com/errata/RHSA-2026:8883 REF https://access.redhat.com/errata/RHSA-2026:8884 REF https://access.redhat.com/errata/RHSA-2026:8885 REF https://access.redhat.com/errata/RHSA-2026:8886 REF https://access.redhat.com/errata/RHSA-2026:8887 REF https://access.redhat.com/errata/RHSA-2026:9290 REF https://access.redhat.com/errata/RHSA-2026:9291 REF https://access.redhat.com/errata/RHSA-2026:9292 REF https://access.redhat.com/errata/RHSA-2026:9294 REF https://access.redhat.com/errata/RHSA-2026:9295 REF https://access.redhat.com/security/cve/CVE-2026-23868 REF https://bugzilla.redhat.com/show_bug.cgi?id=2446207 REF https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23868.json REF https://sourceforge.net/p/giflib/code/ci/f5b7267aed3665ef025c13823e454170d031c106/tree/gifalloc.c?diff=5146815377b7395944cb683a08c43eee3f631eb7 REF https://www.facebook.com/security/advisories/cve-2026-23868

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