{"id":"CVE-2025-38588","title":"ipv6: prevent infinite loop in rt6_nlmsg_size()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent infinite loop in rt6_nlmsg_size()\n\nWhile testing prior patch, I was able to trigger\nan infinite loop in rt6_nlmsg_size() in the following place:\n\nlist_for…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 < 6d345136c9b875f065d226908a29c25cdf9343f8","Linux >= 52da02521ede55fb86546c3fffd9377b3261b91f < e1b7932af47f92432be8303d2439d1bf77b0be23","Linux >= 34a949e7a0869dfa31a40416d2a56973fae1807b < cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38","Linux >= d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 3c13db3e47e170bab19e574404e7b6be45ea873d","Linux >= d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab","Linux >= d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 54e6fe9dd3b0e7c481c2228782c9494d653546da","Linux 11edcd026012ac18acee0f1514db3ed1b160fc6f","Linux >= 6.1.128 < 6.1.148","Linux >= 6.6.75 < 6.6.102","Linux >= 6.12.2 < 6.12.42","Linux >= 6.11.11 < 6.12","Linux 6.13"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:04:39.948956Z"},"published":"2025-08-19","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:12:48.220Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38588","references":[{"url":"https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8"},{"url":"https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23"},{"url":"https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38"},{"url":"https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d"},{"url":"https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab"},{"url":"https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da"}],"tags":["cve.org"],"epss":0.00168,"epssPercentile":0.06047,"ingestedAt":"2026-11-05T22:38:31.997Z","slug":"CVE-2025-38588","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent infinite loop in rt6_nlmsg_size()\n\nWhile testing prior patch, I was able to trigger\nan infinite loop in rt6_nlmsg_size() in the following place:\n\nlist_for_each_entry_rcu(sibling, &f6i->fib6_siblings,\n\t\t\tfib6_siblings) {\n\trt6_nh_nlmsg_size(sibling->fib6_nh, &nexthop_len);\n}\n\nThis is because fib6_del_route() and fib6_add_rt2node()\nuses list_del_rcu(), which can confuse rcu readers,\nbecause they might no longer see the head of the list.\n\nRestart the loop if f6i->fib6_nsiblings is zero.\n\n## Affected\n\n- `Linux >= d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 < 6d345136c9b875f065d226908a29c25cdf9343f8`\n- `Linux >= 52da02521ede55fb86546c3fffd9377b3261b91f < e1b7932af47f92432be8303d2439d1bf77b0be23`\n- `Linux >= 34a949e7a0869dfa31a40416d2a56973fae1807b < cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38`\n- `Linux >= d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 3c13db3e47e170bab19e574404e7b6be45ea873d`\n- `Linux >= d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab`\n- `Linux >= d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 54e6fe9dd3b0e7c481c2228782c9494d653546da`\n- `Linux 11edcd026012ac18acee0f1514db3ed1b160fc6f`\n- `Linux >= 6.1.128 < 6.1.148`\n- `Linux >= 6.6.75 < 6.6.102`\n- `Linux >= 6.12.2 < 6.12.42`\n- `Linux >= 6.11.11 < 6.12`\n- `Linux 6.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}