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.
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Fixes

Solution

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Workaround

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History

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough
First Time appeared Redhat
Redhat ceph Storage
Redhat enterprise Linux
Redhat hummingbird
Weaknesses CWE-122
CPEs cpe:/a:redhat:ceph_storage:4
cpe:/a:redhat:ceph_storage:6
cpe:/a:redhat:ceph_storage:7
cpe:/a:redhat:ceph_storage:8
cpe:/a:redhat:ceph_storage:9
cpe:/a:redhat:hummingbird:1
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat ceph Storage
Redhat enterprise Linux
Redhat hummingbird
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-11T17:56:57.498Z

Reserved: 2026-07-31T15:34:43.453Z

Link: CVE-2026-18495

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T18:16:56.690

Modified: 2026-09-11T18:16:56.690

Link: CVE-2026-18495

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses