USN-8113-2: LibTIFF vulnerabilities

unknownCVE-2025-61143 CVE-2025-61144

USN 8113-1 fixed vulnerabilities in tiff. This update provides the corresponding fixes for Ubuntu 26.04 LTS. Original advisory details: It was discovered that LibTIFF did not properly handle memory when processing certain images. An attacker could possibly use this issue to cause LibTIFF to crash, resulting in a denial of service. (CVE-2025-61143) It was discovered that LibTIFF did not properly handle memory when processing malformed TIFF directories. An attacker could possibly use this issue to cause LibTIFF to crash, resulting in a denial of service. (CVE-2025-61144)

CSIRTS triage

vendor: LibTIFF product: LibTIFF Denial of service Memory corruption

What: Improper memory handling when processing certain TIFF images and malformed TIFF directories enables denial-of-service via application crash.
Who is affected: Applications using LibTIFF to process TIFF image files from untrusted sources.
Urgency: Medium priority; memory handling flaws can crash applications processing malicious TIFF files.
Action: Update LibTIFF to the patched version addressing CVE-2025-61143 and CVE-2025-61144.

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: 2026-08-19
Exploitation: Not in CISA KEV at last sync

Original advisory: https://ubuntu.com/security/notices/USN-8113-2

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-2025-611430.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Low exploitation riskCVE-2025-611440.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-61143	coverage & exploitation status	NVD · CVE.org
CVE-2025-61144	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

medium[UPDATE] [medium] libTIFF: Multiple vulnerabilities enable denial of servicecert-bund