USN-8583-1: GIFLIB vulnerabilities

unknownCVE-2026-26740 CVE-2026-23868

It was discovered that GIFLIB incorrectly handled certain GIF image files. If a user or automated system were tricked into opening a specially crafted GIF file, a remote attacker could use this issue to cause GIFLIB to crash, resulting in a denial of service, or possibly execute arbitrary code.

CSIRTS triage

vendor: GIFLIB product: GIFLIB Denial of serviceOther

What: GIFLIB incorrectly handles certain GIF files, which could lead to crashes or arbitrary code execution.
Who is affected: Users who open specially crafted GIF files with GIFLIB.
Urgency: Remediation is necessary to prevent potential denial of service and arbitrary code execution.
Action: Update to the latest version of GIFLIB.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Ubuntu Security Notices (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-07-22
Exploitation: Not in CISA KEV at last sync

Original advisory: https://ubuntu.com/security/notices/USN-8583-1

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-267400.62% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all scored CVEs.
Low exploitation riskCVE-2026-238680.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-26740	coverage & exploitation status	NVD · CVE.org
CVE-2026-23868	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.