{"id":"CVE-2026-98733","aliases":[],"cve":{"records":[{"id":"CVE-2026-98733","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.367Z","published":"2026-10-18T15:47:11.210Z","modified":"2026-10-30T12:39:09.881Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:39:09.881Z"}],"references":[{"url":"https://git.kernel.org/stable/c/e328b5823fa6b0b160d0922d6d68323e910d09a4","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/545fa70f730eb648a610a2f4b2d270865f77b619","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/d6d709981208567868c5c01ebd1bec5e5e7fdab0","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/708cdd203d0bbcf9255fffb2e4c308d5b28851a7","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/a7161730a3ab3f0a3896000db7ab0284683936e6","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/1a572db43c057566771b485598ad2e66cb390821","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"Bluetooth: hci_core: Serialize fragmented ISO packet queueing","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: Serialize fragmented ISO packet queueing\n\nThe fragmented path in hci_queue_iso() calls __skb_queue_tail() without\nholding conn->data_q.lock. The socket lock serializes senders, but the\ntransmit worker can concurrently remove packets from this queue using\nskb_dequeue().\n\nAfter an insertion saves the old tail pointer, hci_sched_iso() can dequeue\nthat packet and pass it to the driver. The driver can free the packet\nbefore the insertion resumes and writes to the old tail's next pointer,\ncausing a use-after-free. Concurrent updates can also corrupt the queue.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in hci_send_iso+0xc7d/0xe10\n  Call Trace:\n   hci_send_iso+0xc7d/0xe10\n   iso_sock_sendmsg+0x710/0x900\n   __sys_sendto+0x34a/0x3a0\n\n  Allocated by task 86:\n   __alloc_skb+0xdd/0x820\n   alloc_skb_with_frags+0x7e/0x770\n   sock_alloc_send_pskb+0x67a/0x820\n   bt_skb_sendmsg.constprop.0+0xc0/0x6c0\n   iso_sock_sendmsg+0x44e/0x900\n\n  Freed by task 90:\n   kmem_cache_free+0xcb/0x3d0\n   vhci_read+0x33f/0x4d0\n   vfs_read+0x177/0xa20\n\nHold the queue lock across the entire fragment batch, as hci_queue_acl()\ndoes, to serialize insertion against dequeue while preserving fragment\nordering.","score":null,"severity":"unknown","published":"2026-10-18T15:47:11.210Z","modified":"2026-10-30T12:39:09.881Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"26afbd826ee326e63a334c37fd45e82e50a615ec","status":"affected","lessThan":"e328b5823fa6b0b160d0922d6d68323e910d09a4","versionType":"git"},{"version":"26afbd826ee326e63a334c37fd45e82e50a615ec","status":"affected","lessThan":"545fa70f730eb648a610a2f4b2d270865f77b619","versionType":"git"},{"version":"26afbd826ee326e63a334c37fd45e82e50a615ec","status":"affected","lessThan":"d6d709981208567868c5c01ebd1bec5e5e7fdab0","versionType":"git"},{"version":"26afbd826ee326e63a334c37fd45e82e50a615ec","status":"affected","lessThan":"708cdd203d0bbcf9255fffb2e4c308d5b28851a7","versionType":"git"},{"version":"26afbd826ee326e63a334c37fd45e82e50a615ec","status":"affected","lessThan":"a7161730a3ab3f0a3896000db7ab0284683936e6","versionType":"git"},{"version":"26afbd826ee326e63a334c37fd45e82e50a615ec","status":"affected","lessThan":"1a572db43c057566771b485598ad2e66cb390821","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98733"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98733"}],"remediation":[],"references":["https://git.kernel.org/stable/c/e328b5823fa6b0b160d0922d6d68323e910d09a4","https://git.kernel.org/stable/c/545fa70f730eb648a610a2f4b2d270865f77b619","https://git.kernel.org/stable/c/d6d709981208567868c5c01ebd1bec5e5e7fdab0","https://git.kernel.org/stable/c/708cdd203d0bbcf9255fffb2e4c308d5b28851a7","https://git.kernel.org/stable/c/a7161730a3ab3f0a3896000db7ab0284683936e6","https://git.kernel.org/stable/c/1a572db43c057566771b485598ad2e66cb390821"],"sources":[{"name":"CVE","id":"CVE-2026-98733","modified":"2026-10-30T12:39:09.881Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98733"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-30T14:04:35.742Z","kev":{"status":"not-listed","checkedAt":"2026-11-14T23:35:33.875Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}