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CVE-2026-90948— Gimp: gimp: heap-based buffer overflow in ico loader via integer overflow in embedded png dimensions

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 6
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 GIMP 的 ICO 文件加载器中发现了一个缺陷。当处理包含嵌入式 PNG 图像的 ICO 文件时，在计算所需缓冲区大小的过程中可能会发生整数溢出。这会导致分配的缓冲区过小，当解码后的像素数据被写入时，就会引发基于堆的缓冲区溢出。远程攻击者可以通过构造一个恶意的 ICO 文件来利用此漏洞；当该文件被打开时，可能会导致任意代码执行或程序崩溃。

CVSS 7.8 · High
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I. Basic Information for CVE-2026-90948

Vulnerability Information
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Vulnerability Title
Gimp: gimp: heap-based buffer overflow in ico loader via integer overflow in embedded png dimensions
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in GIMP's ICO file loader. When processing an ICO file containing an embedded PNG image, an integer overflow can occur during the calculation of the required buffer size. This leads to an undersized buffer being allocated, causing a heap-based buffer overflow when the decoded pixel data is written. A remote attacker could exploit this by crafting a malicious ICO file, which, when opened, could lead to arbitrary code execution or a crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
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
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-90948

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III. Intelligence Information for CVE-2026-90948

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Vendor Advisories for CVE-2026-90948 (1)

Other References for CVE-2026-90948 (1)

Other References for CVE-2026-90948 (1)

Same Patch Batch · Red Hat · 2026-09-14 · 7 CVEs total

CVE-2026-90947 7.8 HIGH Gimp: gimp: out-of-bounds write in lighting effects plugin via crafted preset file
CVE-2026-90949 7.8 HIGH Gimp: gimp: heap-based buffer overflow in psp loader due to selection-channel geometry mis
CVE-2026-90995 5.5 MEDIUM Sssd: sssd: local denial of service due to null pointer dereference in pam responder
CVE-2026-90996 4.0 MEDIUM Sssd: sssd: denial of service in nss responder via crafted zero-length requests
CVE-2026-90994 4.0 MEDIUM Sssd: sssd: denial of service via malformed pam v1 requests
CVE-2026-90463 4.0 MEDIUM Sssd: local oob read in nss service request parsers (`sss_nss_protocol_parse_svc_name` / `

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 6
Same vendor: Red Hat
Same weakness: CWE-787

V. Comments for CVE-2026-90948

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