CVE-2026-18495

A flaw was found in libtiff. A heap-buffer overflow vulnerability exists in the `tiff2pdf` utility due to an integer truncation error when processing crafted BigTIFF files. An attacker can provide a specially crafted BigTIFF file, causing a 64-bit `StripByteCounts` value to be truncated to a 32-bit integer. This leads to an undersized memory allocation and a subsequent out-of-bounds memory copy, resulting in a crash and severe memory corruption.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.3 / Impact : 4.7

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:53467
https://access.redhat.com/security/cve/CVE-2026-18495
https://bugzilla.redhat.com/show_bug.cgi?id=2531414
https://gitlab.com/libtiff/libtiff/-/merge_requests/729
https://gitlab.com/libtiff/libtiff/-/tree/67fd283d276f09db54dc39b9ef7b979d4b45c4b1

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 18:16

Updated : 2026-09-16 19:42

NVD link : CVE-2026-18495

Mitre link : CVE-2026-18495

CVE.ORG link : CVE-2026-18495

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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