6.1
Medium
CVE-2026-18495 Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough
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 3.1 detail
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:HExploitable with local access to the machine, with an ordinary account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Hardened Images | Versions not published | |
| Red Hat Ceph Storage 4 | Versions not published | |
| Red Hat Ceph Storage 6 | Versions not published | |
| Red Hat Ceph Storage 7 | Versions not published | |
| Red Hat Ceph Storage 8 | Versions not published | |
| Red Hat Ceph Storage 9 | Versions not published | |
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published |
Show the 2 other branches Hide the 2 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published |
References
- RHSA-2026:53467 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2531414 bugzilla.redhat.com
- gitlab.com gitlab.com
- gitlab.com gitlab.com
Timeline
- Published
- Last modified
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