Platform
c
Component
littlecms
Fixed in
2.18.1
CVE-2026-41254 describes an Integer Overflow vulnerability discovered in Little CMS (lcms2), a widely used color management library. This flaw, located in the cmslut.c file, arises from an insufficient overflow check after a multiplication operation, potentially leading to memory corruption. Versions affected range from 0.0.0 through 2.18, and a patch is available in version 2.18.1.
The integer overflow in Little CMS can be exploited to cause a denial-of-service (DoS) condition by crashing applications that rely on the library. A malicious actor could craft a specific color profile or input that triggers the overflow, leading to unexpected behavior or a complete system halt. While direct remote code execution (RCE) is less likely, the memory corruption could potentially be leveraged for more severe consequences depending on the application's security posture and how it handles color processing. The blast radius extends to any application utilizing Little CMS, including image editors, document converters, and printing software.
CVE-2026-41254 is not currently listed on the CISA KEV catalog. The EPSS score is likely to be low to medium, given the need for specific crafted input to trigger the overflow. Public proof-of-concept (PoC) exploits are not currently known, but the vulnerability's nature makes it a potential target for exploitation, especially in environments where color profiles are processed from untrusted sources. The vulnerability was publicly disclosed on 2026-04-18.
Exploit Status
EPSS
0.04% (11% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2026-41254 is to upgrade to Little CMS version 2.18.1 or later. If upgrading is not immediately feasible due to compatibility issues or breaking changes, consider implementing input validation to restrict the size of color profile data. While a WAF or proxy cannot directly address this vulnerability, they can be configured to monitor for unusual color profile activity. There are no specific Sigma or YARA rules readily available for this vulnerability, but monitoring memory usage and looking for unexpected crashes in applications using Little CMS can be indicative of exploitation. After upgrading, confirm the fix by processing a known benign color profile and verifying that no errors or crashes occur.
Update to version 2.18.1 or later to mitigate the integer overflow risk. This update corrects the vulnerability by performing the overflow check after the multiplication, thus preventing exploitation.
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CVE-2026-41254 is a vulnerability in Little CMS versions 0.0.0–2.18 where an integer overflow in the cmslut.c file can lead to memory corruption, potentially causing application crashes.
If you are using Little CMS versions 0.0.0 through 2.18, you are potentially affected. Check your system's dependencies to determine if Little CMS is in use.
Upgrade to Little CMS version 2.18.1 or later to resolve the vulnerability. If upgrading is not possible, consider input validation as a temporary workaround.
Currently, there are no confirmed reports of active exploitation, but the vulnerability's nature makes it a potential target.
Refer to the Little CMS project's website or security mailing lists for the official advisory related to CVE-2026-41254.
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