{"api_version":"1","generated_at":"2026-08-22T02:51:22+00:00","cve":"CVE-2026-72392","urls":{"html":"https://cve.report/CVE-2026-72392","api":"https://cve.report/api/cve/CVE-2026-72392.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72392","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72392"},"summary":{"title":"ipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batch dump","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batch dump\n\ninet6_dump_fib() saves its progress in cb->args[1] as a positional\nindex within the current hash chain.  Between batches, a concurrent\nfib6_new_table() can insert a new table at the chain head, shifting\nall existing entries.  The saved index then lands on a different\ntable, causing fib6_dump_table() to set w->root to the wrong table\nwhile w->node still points into the previous one.\nfib6_walk_continue() dereferences w->node->parent (NULL) and panics:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000008\n  RIP: 0010:fib6_walk_continue+0x6e/0x170\n  Call Trace:\n   <TASK>\n   fib6_dump_table.isra.0+0xc5/0x240\n   inet6_dump_fib+0xf6/0x420\n   rtnl_dumpit+0x30/0xa0\n   netlink_dump+0x15b/0x460\n   netlink_recvmsg+0x1d6/0x2a0\n   ____sys_recvmsg+0x17a/0x190\n\nFix by storing tb->tb6_id in cb->args[1] instead of a positional\nindex.  On resume, skip entries until the id matches; a concurrent\nhead-insert can never match the saved id, so the walker always\nresumes on the correct table.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:12","updated_at":"2026-08-19 17:21:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/89f9c5fee3c64c5cabc34e65599308fd3c879cf9","name":"https://git.kernel.org/stable/c/89f9c5fee3c64c5cabc34e65599308fd3c879cf9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/059efb48dd746518898faaa9b965511009b59639","name":"https://git.kernel.org/stable/c/059efb48dd746518898faaa9b965511009b59639","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9facb861dc6b9b9ea9793ef5032a9a826f7a4229","name":"https://git.kernel.org/stable/c/9facb861dc6b9b9ea9793ef5032a9a826f7a4229","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d8a01d27873e04bebd357dc87859aa756e0b28b2","name":"https://git.kernel.org/stable/c/d8a01d27873e04bebd357dc87859aa756e0b28b2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/27210d433a8c5fe6bf7278a04bbaeb49a81d0290","name":"https://git.kernel.org/stable/c/27210d433a8c5fe6bf7278a04bbaeb49a81d0290","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cb90a774a9c6c46961a44949a246fbb61f5f934c","name":"https://git.kernel.org/stable/c/cb90a774a9c6c46961a44949a246fbb61f5f934c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/110ccbd28c9444866fcc84ba96a2ad64fa6e95ae","name":"https://git.kernel.org/stable/c/110ccbd28c9444866fcc84ba96a2ad64fa6e95ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ee73a32dd258d4af66831ff006b771e19812b322","name":"https://git.kernel.org/stable/c/ee73a32dd258d4af66831ff006b771e19812b322","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72392","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72392","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1b43af5480c351dbcb2eef478bafe179cbeb6e83 ee73a32dd258d4af66831ff006b771e19812b322 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1b43af5480c351dbcb2eef478bafe179cbeb6e83 89f9c5fee3c64c5cabc34e65599308fd3c879cf9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1b43af5480c351dbcb2eef478bafe179cbeb6e83 cb90a774a9c6c46961a44949a246fbb61f5f934c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1b43af5480c351dbcb2eef478bafe179cbeb6e83 27210d433a8c5fe6bf7278a04bbaeb49a81d0290 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72392","cve":"CVE-2026-72392","epss":"0.002060000","percentile":"0.109510000","score_date":"2026-08-19","updated_at":"2026-08-20 00:13:09"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/ip6_fib.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ee73a32dd258d4af66831ff006b771e19812b322","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"},{"lessThan":"89f9c5fee3c64c5cabc34e65599308fd3c879cf9","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"},{"lessThan":"cb90a774a9c6c46961a44949a246fbb61f5f934c","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"},{"lessThan":"27210d433a8c5fe6bf7278a04bbaeb49a81d0290","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"},{"lessThan":"059efb48dd746518898faaa9b965511009b59639","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"},{"lessThan":"d8a01d27873e04bebd357dc87859aa756e0b28b2","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"},{"lessThan":"110ccbd28c9444866fcc84ba96a2ad64fa6e95ae","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"},{"lessThan":"9facb861dc6b9b9ea9793ef5032a9a826f7a4229","status":"affected","version":"1b43af5480c351dbcb2eef478bafe179cbeb6e83","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/ip6_fib.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.19"},{"lessThan":"2.6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.265","versionStartIncluding":"2.6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"2.6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"2.6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"2.6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"2.6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"2.6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"2.6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"2.6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batch dump\n\ninet6_dump_fib() saves its progress in cb->args[1] as a positional\nindex within the current hash chain.  Between batches, a concurrent\nfib6_new_table() can insert a new table at the chain head, shifting\nall existing entries.  The saved index then lands on a different\ntable, causing fib6_dump_table() to set w->root to the wrong table\nwhile w->node still points into the previous one.\nfib6_walk_continue() dereferences w->node->parent (NULL) and panics:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000008\n  RIP: 0010:fib6_walk_continue+0x6e/0x170\n  Call Trace:\n   <TASK>\n   fib6_dump_table.isra.0+0xc5/0x240\n   inet6_dump_fib+0xf6/0x420\n   rtnl_dumpit+0x30/0xa0\n   netlink_dump+0x15b/0x460\n   netlink_recvmsg+0x1d6/0x2a0\n   ____sys_recvmsg+0x17a/0x190\n\nFix by storing tb->tb6_id in cb->args[1] instead of a positional\nindex.  On resume, skip entries until the id matches; a concurrent\nhead-insert can never match the saved id, so the walker always\nresumes on the correct table."}],"providerMetadata":{"dateUpdated":"2026-08-19T16:36:33.417Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ee73a32dd258d4af66831ff006b771e19812b322"},{"url":"https://git.kernel.org/stable/c/89f9c5fee3c64c5cabc34e65599308fd3c879cf9"},{"url":"https://git.kernel.org/stable/c/cb90a774a9c6c46961a44949a246fbb61f5f934c"},{"url":"https://git.kernel.org/stable/c/27210d433a8c5fe6bf7278a04bbaeb49a81d0290"},{"url":"https://git.kernel.org/stable/c/059efb48dd746518898faaa9b965511009b59639"},{"url":"https://git.kernel.org/stable/c/d8a01d27873e04bebd357dc87859aa756e0b28b2"},{"url":"https://git.kernel.org/stable/c/110ccbd28c9444866fcc84ba96a2ad64fa6e95ae"},{"url":"https://git.kernel.org/stable/c/9facb861dc6b9b9ea9793ef5032a9a826f7a4229"}],"title":"ipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batch dump","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72392","datePublished":"2026-08-15T05:56:20.463Z","dateReserved":"2026-08-09T03:40:39.924Z","dateUpdated":"2026-08-19T16:36:33.417Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:12","lastModifiedDate":"2026-08-19 17:21:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72392","Ordinal":"1","Title":"ipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batc","CVE":"CVE-2026-72392","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72392","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batch dump\n\ninet6_dump_fib() saves its progress in cb->args[1] as a positional\nindex within the current hash chain.  Between batches, a concurrent\nfib6_new_table() can insert a new table at the chain head, shifting\nall existing entries.  The saved index then lands on a different\ntable, causing fib6_dump_table() to set w->root to the wrong table\nwhile w->node still points into the previous one.\nfib6_walk_continue() dereferences w->node->parent (NULL) and panics:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000008\n  RIP: 0010:fib6_walk_continue+0x6e/0x170\n  Call Trace:\n   <TASK>\n   fib6_dump_table.isra.0+0xc5/0x240\n   inet6_dump_fib+0xf6/0x420\n   rtnl_dumpit+0x30/0xa0\n   netlink_dump+0x15b/0x460\n   netlink_recvmsg+0x1d6/0x2a0\n   ____sys_recvmsg+0x17a/0x190\n\nFix by storing tb->tb6_id in cb->args[1] instead of a positional\nindex.  On resume, skip entries until the id matches; a concurrent\nhead-insert can never match the saved id, so the walker always\nresumes on the correct table.","Type":"Description","Title":"ipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batc"}]}}}