CVE-2026-18495— Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough
Quick assessment
Affected
Red Hat Red Hat Hardened Images
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 libtiff 中发现了一个缺陷。 工具中存在一个堆缓冲区溢出漏洞，这是由于在处理特制的 BigTIFF 文件时发生的整数截断错误。攻击者可以提供一个特制的 BigTIFF 文件，导致 64 位的 值被截断为 32 位整数。这会导致内存分配不足，并随后引发越界内存复制，最终造成程序崩溃和严重的内存损坏。
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I. Basic Information for CVE-2026-18495
Vulnerability Information
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Vulnerability Title
Libtiff: libtiff: heap-buffer overflow via numeric truncation in the jpeg raw passthrough
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Hardened Images | 4.7.2-2.hum1 ~ * |
cpe:/a:redhat:hummingbird:1
|
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| Red Hat | Red Hat Ceph Storage 4 | - |
cpe:/a:redhat:ceph_storage:4
|
|
| Red Hat | Red Hat Ceph Storage 6 | - |
cpe:/a:redhat:ceph_storage:6
|
|
| Red Hat | Red Hat Ceph Storage 7 | - |
cpe:/a:redhat:ceph_storage:7
|
|
| Red Hat | Red Hat Ceph Storage 8 | - |
cpe:/a:redhat:ceph_storage:8
|
|
| Red Hat | Red Hat Ceph Storage 9 | - |
cpe:/a:redhat:ceph_storage:9
|
|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Hardened Images | - |
cpe:/a:redhat:hummingbird:1
|
|
II. Public POCs for CVE-2026-18495
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-18495 (1)
Vendor Advisories for CVE-2026-18495 (2)
Other References for CVE-2026-18495 (1)
Same Patch Batch · Red Hat · 2026-09-11 · 6 CVEs total
| CVE-2026-89060 | 7.7 HIGH | Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multiclu |
| CVE-2026-89329 | 6.2 MEDIUM | Device-mapper-multipath: local denial of service via blocking ipc send operations |
| CVE-2026-77159 | 5.5 MEDIUM | Libvirt: unsafe chown in qemutpmemulatorpreparehost() allows arbitrary file ownership chan |
| CVE-2026-89298 | 4.9 MEDIUM | Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients |
| CVE-2026-88914 | 4.4 MEDIUM | Gstreamer1-plugins-good: gstreamer: integer overflow and out-of-bounds read in qtdemux cea |
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V. Comments for CVE-2026-18495
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