USN-8531-1: libexif vulnerabilities

unknownCVE-2026-32775 CVE-2026-40385 CVE-2026-40386

It was discovered that libexif had an integer overflow in its MakerNote decoder when called with a zero-length buffer. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2026-32775) It was discovered that libexif had an integer overflow in its Nikon MakerNote handler on 32-bit systems. A local attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2026-40385) It was discovered that libexif had an integer underflow in its size checking for Fuji and Olympus MakerNote decoding. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2026-40386)

CSIRTS triage

vendor: libexif product: libexif Denial of service Information disclosure

What: libexif has multiple vulnerabilities that could lead to denial of service or sensitive information disclosure.
Who is affected: Users of libexif in applications that process image metadata.
Urgency: Remediation is important to prevent potential denial of service and information leaks.
Action: Update to the latest version of libexif to address these vulnerabilities.

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: 2026-07-13
Exploitation: Not in CISA KEV at last sync

Original advisory: https://ubuntu.com/security/notices/USN-8531-1

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-2026-327750.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all scored CVEs.
Low exploitation riskCVE-2026-403850.09% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all scored CVEs.
Low exploitation riskCVE-2026-403860.14% 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-2026-32775	coverage & exploitation status	NVD · CVE.org
CVE-2026-40385	coverage & exploitation status	NVD · CVE.org
CVE-2026-40386	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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