{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63969","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T07:54:57.024Z","datePublished":"2026-07-19T14:55:56.330Z","dateUpdated":"2026-07-19T14:55:56.330Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-19T14:55:56.330Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix possible infinite loop in rt6_fill_node()\n\nSashiko reported this issue [1]. Apply the same fix as\ncommit f8d8ce1b515a (\"ipv6: fix possible infinite loop in fib6_info_uses_dev()\").\n\nWriters holding tb6_lock can list_del_rcu(&rt->fib6_siblings)\nwithout waiting for RCU readers; rt->fib6_siblings.next then still\npoints into the old ring and this softirq-side walker never reaches\n&rt->fib6_siblings, causing a CPU stall. fib6_del_route() always\nWRITE_ONCE()s rt->fib6_nsiblings to 0 before list_del_rcu(), so an\ninside-loop check is a reliable detach signal.\n\n[1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/route.c"],"versions":[{"version":"d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2","lessThan":"b014a63d2f2c2c767762b548381882dfb1655529","status":"affected","versionType":"git"},{"version":"52da02521ede55fb86546c3fffd9377b3261b91f","lessThan":"279853aec9f58d5cd723e6e5617c1c3337b30383","status":"affected","versionType":"git"},{"version":"34a949e7a0869dfa31a40416d2a56973fae1807b","lessThan":"c65b1f60237daac7c56c2652e064cc566a45dc81","status":"affected","versionType":"git"},{"version":"d9ccb18f83ea2bb654289b6ecf014fd267cc988b","lessThan":"dc36a04621dcc2447dae428709207810b6c06e14","status":"affected","versionType":"git"},{"version":"d9ccb18f83ea2bb654289b6ecf014fd267cc988b","lessThan":"5e40de719ee76b8d96e2556ce36dbd3bd07bf37d","status":"affected","versionType":"git"},{"version":"d9ccb18f83ea2bb654289b6ecf014fd267cc988b","lessThan":"9f72412bcf60144f252b0d6205106abf14344abc","status":"affected","versionType":"git"},{"version":"11edcd026012ac18acee0f1514db3ed1b160fc6f","status":"affected","versionType":"git"},{"version":"6.1.128","lessThan":"6.1.176","status":"affected","versionType":"semver"},{"version":"6.6.75","lessThan":"6.6.143","status":"affected","versionType":"semver"},{"version":"6.12.2","lessThan":"6.12.93","status":"affected","versionType":"semver"},{"version":"6.11.11","lessThan":"6.12","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/route.c"],"versions":[{"version":"6.13","status":"affected"},{"version":"0","lessThan":"6.13","status":"unaffected","versionType":"semver"},{"version":"6.1.176","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.143","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.93","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.35","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.12","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.128","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.75","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.2","versionEndExcluding":"6.12.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11.11"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b014a63d2f2c2c767762b548381882dfb1655529"},{"url":"https://git.kernel.org/stable/c/279853aec9f58d5cd723e6e5617c1c3337b30383"},{"url":"https://git.kernel.org/stable/c/c65b1f60237daac7c56c2652e064cc566a45dc81"},{"url":"https://git.kernel.org/stable/c/dc36a04621dcc2447dae428709207810b6c06e14"},{"url":"https://git.kernel.org/stable/c/5e40de719ee76b8d96e2556ce36dbd3bd07bf37d"},{"url":"https://git.kernel.org/stable/c/9f72412bcf60144f252b0d6205106abf14344abc"}],"title":"ipv6: fix possible infinite loop in rt6_fill_node()","x_generator":{"engine":"bippy-1.2.0"}}}}