{"id":"CVE-2025-5688","aliases":["EUVD-2025-16897","GHSA-5x4f-fvv8-wr65"],"status":"published","title":"Out of Bounds Write in FreeRTOS-Plus-TCP","description":"We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled.\n\n\nUsers should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.","severity":{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00351,"percentile":0.29029,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-787"],"published":"2025-06-04T17:09:54Z","modified":"2026-10-28T02:30:41Z","exploits":[{"source":"pocgithub","id":"mbanyamer/CVE-2025-5688-FreeRTOS-Plus-TCP-Out-of-Bounds-Write","title":"mbanyamer/CVE-2025-5688-FreeRTOS-Plus-TCP-Out-of-Bounds-Write","date":"2026-02-26","url":"https://github.com/mbanyamer/CVE-2025-5688-FreeRTOS-Plus-TCP-Out-of-Bounds-Write"}],"products":[{"vendor":"amazon","product":"freertos"}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/AWS-2025-012/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.3.2","tags":["patch","fix"]},{"url":"https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-5x4f-fvv8-wr65","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/5xxx/CVE-2025-5688.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-5688","tags":["advisory"]},{"url":"https://github.com/FreeRTOS/FreeRTOS-Plus-TCP","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-5688","title":"Out of Bounds Write in FreeRTOS-Plus-TCP","description":"We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled.\n\n\nUsers should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.","status":"published","published":"2025-06-04T17:09:54.718Z","modified":"2025-10-14T18:05:10.779Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:32:29.97618Z"}],"euvd":[{"id":"EUVD-2025-16897","description":"We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled.\n\n\nUsers should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.","status":"published","published":"2025-06-04T17:09:54Z","modified":"2025-10-14T18:05:10Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T20:31:33.01309Z"}],"nvd":[{"id":"CVE-2025-5688","description":"We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled.\n\n\nUsers should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.","status":"published","published":"2025-06-04T17:15:29.33Z","modified":"2026-06-17T09:48:33.49Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:11:10.8732Z"}],"osv":[{"id":"CVE-2025-5688","title":"Out of Bounds Write in FreeRTOS-Plus-TCP","description":"We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled.\n\n\nUsers should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.","status":"published","published":"2025-06-04T17:09:54.718Z","modified":"2026-10-28T02:30:41.589186126Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:44:51.190588Z"}]}}