{"id":"CVE-2026-80764","state":"PUBLISHED","title":"Bluetooth: hci_event: fix LE list UAF on reset","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix LE list UAF on reset\n\nhci_cc_reset() clears the LE accept and resolving lists without taking\nhdev->lock. Other command-complete handlers serialize updates to these\nlists with that lock, and the debugfs readers hold it while walking them.\n\nThis permits the reset completion and a debugfs read to interleave as\nfollows:\n\n  hci_rx_work                 debugfs reader\n  -----------                 --------------\n                              lock hdev->lock\n                              fetch current entry\n  list_del(entry)\n  kfree(entry)\n                              read entry fields\n\nThe reader then dereferences a freed list entry and may follow its stale\nnext pointer.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180\n  Read of size 1 at addr ffff8881015dab16 by task poc/95\n\n  Call Trace:\n   white_list_show+0x15f/0x180\n   seq_read_iter+0x3ff/0x1190\n   seq_read+0x267/0x3d0\n   vfs_read+0x177/0xa20\n   ksys_read+0xf7/0x1c0\n\n  Allocated by task 91:\n   hci_bdaddr_list_add+0x1a6/0x3a0\n   hci_cc_le_add_to_accept_list+0xab/0x140\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\n  Freed by task 90:\n   kfree+0x131/0x3c0\n   hci_bdaddr_list_clear+0xd8/0x160\n   hci_cc_reset+0x28a/0x370\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\nTake hdev->lock around both list clears. This matches the existing\nmutation and traversal locking convention.","publishedAt":"2026-09-04T15:12:36.599Z","updatedAt":"2026-10-19T08:43:20.790Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"8e68c380290b1dd64a0a512ce66d0264130c46ed","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"0628cc9b2fa29985a7b8c774741f8a736b0f5e7c","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"d57702d4c55633c243da5a2fec37ae2ad4adb621","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"39a3afb91be3cb465f46ce7a8e5696d9e33edf93","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"b55e83a4ba31d40deae22d4e4dc8c84083e953c6","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"25b05e3ce31d954540e99954bcc66cbceb27ab35","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"33af47e847fe4a28b109673affb5874015d54f5a","versionType":"git"},{"version":"0de8cd646b0152c9ddd10257d8284938d0df0181","status":"affected","versionType":"git"},{"version":"3.18.3","status":"affected","lessThan":"3.19","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_event.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.19","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.154","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.1","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_event.c"]}],"references":["https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed","https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c","https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621","https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93","https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6","https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35","https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80764.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80764","state":"PUBLISHED","datePublished":"2026-09-04T15:12:36.599Z","dateUpdated":"2026-10-19T08:43:20.790Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.791Z"},"containers":{"cna":{"title":"Bluetooth: hci_event: fix LE list UAF on reset","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix LE list UAF on reset\n\nhci_cc_reset() clears the LE accept and resolving lists without taking\nhdev->lock. Other command-complete handlers serialize updates to these\nlists with that lock, and the debugfs readers hold it while walking them.\n\nThis permits the reset completion and a debugfs read to interleave as\nfollows:\n\n  hci_rx_work                 debugfs reader\n  -----------                 --------------\n                              lock hdev->lock\n                              fetch current entry\n  list_del(entry)\n  kfree(entry)\n                              read entry fields\n\nThe reader then dereferences a freed list entry and may follow its stale\nnext pointer.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180\n  Read of size 1 at addr ffff8881015dab16 by task poc/95\n\n  Call Trace:\n   white_list_show+0x15f/0x180\n   seq_read_iter+0x3ff/0x1190\n   seq_read+0x267/0x3d0\n   vfs_read+0x177/0xa20\n   ksys_read+0xf7/0x1c0\n\n  Allocated by task 91:\n   hci_bdaddr_list_add+0x1a6/0x3a0\n   hci_cc_le_add_to_accept_list+0xab/0x140\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\n  Freed by task 90:\n   kfree+0x131/0x3c0\n   hci_bdaddr_list_clear+0xd8/0x160\n   hci_cc_reset+0x28a/0x370\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\nTake hdev->lock around both list clears. This matches the existing\nmutation and traversal locking convention."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"8e68c380290b1dd64a0a512ce66d0264130c46ed","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"0628cc9b2fa29985a7b8c774741f8a736b0f5e7c","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"d57702d4c55633c243da5a2fec37ae2ad4adb621","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"39a3afb91be3cb465f46ce7a8e5696d9e33edf93","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"b55e83a4ba31d40deae22d4e4dc8c84083e953c6","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"25b05e3ce31d954540e99954bcc66cbceb27ab35","versionType":"git"},{"version":"a4d5504d5c39cc84f1f828e19967595597a8136e","status":"affected","lessThan":"33af47e847fe4a28b109673affb5874015d54f5a","versionType":"git"},{"version":"0de8cd646b0152c9ddd10257d8284938d0df0181","status":"affected","versionType":"git"},{"version":"3.18.3","status":"affected","lessThan":"3.19","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/hci_event.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.19","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.154","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.1","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_event.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed"},{"url":"https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c"},{"url":"https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621"},{"url":"https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93"},{"url":"https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6"},{"url":"https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35"},{"url":"https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:43:20.790Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.1.185"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.6.154"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.12.106"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.18.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"7.1.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"7.2.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}