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CVE-2026-26740

Published: Mar 18, 2026Updated: Mar 21, 2026 Sources: CVE List NVD BDUCWE-787
NVD MITRE
8.2CVSSHIGH
EPSS Score
0.3%
Top 76.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

n/an/a
giflibgiflib project
Library
OSS Libraries / generic-library
Suse Linux Enterprise DesktopNovell Inc.
On-premOS
Operating Systems / linux-distro
OpenSUSE LeapNovell Inc.
On-premOS
Operating Systems / linux-distro
SUSE OpenStack CloudNovell Inc.
On-prem
Operating Systems / linux-distro
giflib projectoss-projectOSS Librariesaka giflib
novell inc.commercialUSOperating Systems
and 13 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/zakkanijia/POC/blob/main/giflib/giftool/giflib_giftool_gce_len_heap_oobwrite_disclosure.md
github.com
https://github.com/zakkanijia/POC/blob/main/giflib/giftool/giflib_giftool_gce_len_heap_oobwrite_disclosure.md
github.com
https://www.suse.com/security/cve/CVE-2026-26740.html
suse.com
and 2 more references View all →

Timeline

Published
Mar 18, 2026
Last Updated
Mar 21, 2026

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