?? Meta Warns of Critical FreeType Vulnerability (CVE-2025-27363) Amid Active Exploitation Risks
Meta has issued a security alert ?? regarding a serious vulnerability affecting the FreeType open-source font rendering library. The flaw, identified as CVE-2025-27363, has been assigned a CVSS score of 8.1 ??, marking it as a high-severity threat. Security researchers warn that this vulnerability may have already been exploited in real-world attacks. ???♂?
?? Understanding the Vulnerability
The vulnerability is classified as an out-of-bounds write flaw ??, which can be exploited to achieve remote code execution (RCE) ?? when processing specific font files. According to Meta’s advisory, the issue affects FreeType versions 2.13.0 and earlier and stems from improper memory allocation when parsing TrueType GX and variable font files.
??? How the Exploit Works
The flaw arises from incorrectly assigning a signed short value to an unsigned long ??, causing a memory wraparound. This results in the allocation of an insufficient heap buffer, followed by out-of-bounds writes that can affect program execution. Attackers could leverage this to execute arbitrary code on vulnerable systems ??.
?? Active Exploitation Concerns
While Meta has not disclosed specific details about active attacks, it has acknowledged that the vulnerability may already be exploited in the wild ??. The scope of these attacks and the actors behind them remain unknown ?.
Werner Lemberg, a developer for FreeType, confirmed that a fix for this vulnerability has been available for almost two years ???. Any FreeType version beyond 2.13.0 is no longer affected ?.
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?? Linux Distributions at Risk
Despite the fix being available, several Linux distributions are still running outdated versions of FreeType, leaving them exposed to potential attacks ??. Affected distributions include:
?? Recommended Actions
Given the active exploitation risks, users and administrators are strongly advised to update FreeType to version 2.13.3 as soon as possible ?. Keeping software updated is critical ?? in preventing potential attacks that leverage known vulnerabilities.
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