CVE-2026-18495: Red Hat Ceph Storage 4

Medium severity, CVSS 6.1. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• 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 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9
• Red Hat Red Hat Hardened Images: before 4.7.2-2.hum1 (fixed in 4.7.2-2.hum1)

Published 2026-09-11. Last modified 2026-10-07.