CVE-2025-11715: 
NixOS vulnerability analysis and mitigation

CVE-2025-11715 is a high-severity memory safety vulnerability discovered in Mozilla products. The vulnerability affects Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143, and Thunderbird 143. It was disclosed on October 14, 2025, and fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird ESR 140.4 (Mozilla Advisory).

The vulnerability is classified as a memory safety bug that shows evidence of memory corruption. According to the technical assessment, it falls under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). The CVSS v3.1 base score is 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating network accessibility with low attack complexity and no privileges required (NVD).

The vulnerability could potentially allow arbitrary code execution if exploited successfully. The Mozilla security team has indicated that with enough effort, the memory corruption bugs could be exploited to run malicious code on affected systems (Mozilla Advisory).

The vulnerability has been patched in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird ESR 140.4. Users are advised to update to these versions or later to mitigate the risk. Red Hat has also released security updates for affected products through RHSA-2025:18320 (Red Hat Advisory).