CVE-2026-18495: Heap-based Buffer Overflow in Red Hat Red Hat Hardened Images
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.
CVE-2026-18495: Heap-based Buffer Overflow in Red Hat Red Hat Hardened Images
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.
CVSS v3.1
Score 6.1medium
Affected software
Red Hat
Red Hat Hardened Images
Red Hat
Red Hat Ceph Storage 4
Red Hat
Red Hat Ceph Storage 6
Red Hat
Red Hat Ceph Storage 7
Red Hat
Red Hat Ceph Storage 8
Red Hat
Red Hat Ceph Storage 9
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Hardened Images
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-07-31T15:34:43.453Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/errata/RHSA-2026:53467","vendor":"Red Hat"},{"url":"https://access.redhat.com/security/cve/CVE-2026-18495","vendor":"Red Hat"}]
Threat ID: 6aa43eaf91cc7f384877adf9
Added to database: 09/11/2026, 17:47:27 UTC
Last updated: 09/11/2026, 17:47:27 UTC
Views: 1
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