CVE-2026-42169— Gimp: gimp apng loader heap-buffer-overflow when fctl width exceeds ihdr width (file-png.c)
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 9
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.
GIMP GIMP是GIMP组织开源的一款图像编辑和处理软件。 GIMP存在缓冲区错误漏洞，该漏洞源于APNG文件加载器中fcTL宽度超过IHDR宽度时像素数据被写入超出堆分配边界，以及DDS插件load_layer()函数中BPP不匹配，打开特制图像文件可能触发这些漏洞，导致代码执行。
Possible ATT&CK Techniques 2 AI
T1203 · Exploitation for Client Execution T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 6 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 7 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 2:3.0.4-4.el9_8.9< * |
unaffected |
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I. Basic Information for CVE-2026-42169
Vulnerability Information
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Vulnerability Title
Gimp: gimp apng loader heap-buffer-overflow when fctl width exceeds ihdr width (file-png.c)
Source: CVE Program / CVE List V5
Vulnerability Description
A heap-buffer-overflow vulnerability exists in the APNG (Animated PNG) file loader of GIMP. This flaw occurs when the `fcTL` width exceeds the `IHDR` width, leading to pixel data being written past the end of a heap allocation. Additionally, a heap-based buffer overflow exists in the DDS plug-in due to a BPP mismatch in the `load_layer()` function. Both vulnerabilities can be triggered by opening a specially crafted image file, potentially leading to code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
Source: CVE Program / CVE List V5
Vulnerability Title
GIMP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GIMP GIMP是GIMP组织开源的一款图像编辑和处理软件。 GIMP存在缓冲区错误漏洞，该漏洞源于APNG文件加载器中fcTL宽度超过IHDR宽度时像素数据被写入超出堆分配边界，以及DDS插件load_layer()函数中BPP不匹配，打开特制图像文件可能触发这些漏洞，导致代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 9 | 2:3.0.4-4.el9_8.9 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| 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 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
II. Public POCs for CVE-2026-42169
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-42169 (3)
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-
-
🔗 RHSA-2026:50817 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-08-04 · 6 CVEs total
| CVE-2026-68743 | 5.5 MEDIUM | Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v |
| CVE-2026-18103 | 4.9 MEDIUM | Dhcp-server: dhcp-server: persistent denial of service due to buffer overflow via omapi |
| CVE-2026-17614 | 4.4 MEDIUM | Wildfly-core: path traversal on wildfly domain controller |
| CVE-2026-18569 | 3.7 LOW | Keycloak-services: keycloak-services: oidc backchannel logout accepts unsigned forged logo |
| CVE-2026-68744 | 3.3 LOW | Sssd: sssd: nss responder uninitialized heap disclosure in initgroups reply |
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V. Comments for CVE-2026-42169
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