Red HatCVE-2026-18495
Red Hat Ceph Storage 4: buffer overflow
Medium6.1CVE-2026-18495 · Published Sep 11, 2026 · updated Sep 16, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Ceph Storage 4 Product | all versions | No fix yet |
| Red Hat Ceph Storage 6 Product | all versions | No fix yet |
| Red Hat Ceph Storage 7 Product | all versions | No fix yet |
| Red Hat Ceph Storage 8 Product | all versions | No fix yet |
| Red Hat Ceph Storage 9 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| all versions | No fix yet | |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-122
- www.cve.org/CVERecord?id=CVE-2026-18495
- nvd.nist.gov/vuln/detail/CVE-2026-18495
- access.redhat.com/errata/RHSA-2026:53467
- access.redhat.com/security/cve/CVE-2026-18495
- bugzilla.redhat.com/show_bug.cgi?id=2531414
- gitlab.com/libtiff/libtiff/-/merge_requests/729
- gitlab.com/libtiff/libtiff/-/tree/67fd283d276f09db54dc39b9ef7b979d4b45c4b1
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