{"id":"CVE-2026-98459","state":"PUBLISHED","title":"Bluetooth: ISO: balance the parent hold in hci_bind_bis()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: balance the parent hold in hci_bind_bis()\n\nhci_conn_link() takes a lifetime reference to its parent with\nhci_conn_get(), but only takes an operational hold on the child.\nhci_conn_unlink() later balances both a hold and a reference on the\nparent.\n\nThe SCO and CIS paths pass a parent acquired from a connect helper, so\nit already has a hold. For an additional BIS, hci_bind_bis() obtains the\nparent from hci_conn_hash_lookup_big(), which returns a bare pointer.\nUnlinking the child then drops the parent's existing hold and can\nschedule it for disconnection while its socket is still using it.\n\nTake a hold on the parent before linking it and drop that hold if linking\nfails. A successful link transfers the hold to hci_conn_unlink().","publishedAt":"2026-10-18T15:15:08.537Z","updatedAt":"2026-10-19T09:19:55.996Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9","status":"affected","lessThan":"ff28e6c67143c76ef50c3eac01f2fad411705f71","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"03a91cdf6862fb351a74f035ad21e70112438552","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"4e49206d9574a4c109480198e73aea34ad0ed7f6","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"bbcd723ee7a84bc868142fd57717af88e54e555a","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"4c94557dd02569efa6c1072a0439addaef9a5224","versionType":"git"},{"version":"6.6.67","status":"affected","lessThan":"6.6.158","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_conn.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_conn.c"]}],"references":["https://git.kernel.org/stable/c/ff28e6c67143c76ef50c3eac01f2fad411705f71","https://git.kernel.org/stable/c/03a91cdf6862fb351a74f035ad21e70112438552","https://git.kernel.org/stable/c/4e49206d9574a4c109480198e73aea34ad0ed7f6","https://git.kernel.org/stable/c/bbcd723ee7a84bc868142fd57717af88e54e555a","https://git.kernel.org/stable/c/4c94557dd02569efa6c1072a0439addaef9a5224"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98459.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98459","state":"PUBLISHED","datePublished":"2026-10-18T15:15:08.537Z","dateUpdated":"2026-10-19T09:19:55.996Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.350Z"},"containers":{"cna":{"title":"Bluetooth: ISO: balance the parent hold in hci_bind_bis()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: balance the parent hold in hci_bind_bis()\n\nhci_conn_link() takes a lifetime reference to its parent with\nhci_conn_get(), but only takes an operational hold on the child.\nhci_conn_unlink() later balances both a hold and a reference on the\nparent.\n\nThe SCO and CIS paths pass a parent acquired from a connect helper, so\nit already has a hold. For an additional BIS, hci_bind_bis() obtains the\nparent from hci_conn_hash_lookup_big(), which returns a bare pointer.\nUnlinking the child then drops the parent's existing hold and can\nschedule it for disconnection while its socket is still using it.\n\nTake a hold on the parent before linking it and drop that hold if linking\nfails. A successful link transfers the hold to hci_conn_unlink()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"11dc486ed5d4626e6b92a23b67ed76cb6c48bfc9","status":"affected","lessThan":"ff28e6c67143c76ef50c3eac01f2fad411705f71","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"03a91cdf6862fb351a74f035ad21e70112438552","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"4e49206d9574a4c109480198e73aea34ad0ed7f6","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"bbcd723ee7a84bc868142fd57717af88e54e555a","versionType":"git"},{"version":"fa224d0c094a458e9ebf5ea9b1c696136b7af427","status":"affected","lessThan":"4c94557dd02569efa6c1072a0439addaef9a5224","versionType":"git"},{"version":"6.6.67","status":"affected","lessThan":"6.6.158","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_conn.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_conn.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ff28e6c67143c76ef50c3eac01f2fad411705f71"},{"url":"https://git.kernel.org/stable/c/03a91cdf6862fb351a74f035ad21e70112438552"},{"url":"https://git.kernel.org/stable/c/4e49206d9574a4c109480198e73aea34ad0ed7f6"},{"url":"https://git.kernel.org/stable/c/bbcd723ee7a84bc868142fd57717af88e54e555a"},{"url":"https://git.kernel.org/stable/c/4c94557dd02569efa6c1072a0439addaef9a5224"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:19:55.996Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.67","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}