{"id":49692,"date":"2026-04-27T10:19:27","date_gmt":"2026-04-27T10:19:27","guid":{"rendered":"http:\/\/localhost\/?p=49692"},"modified":"2026-04-27T10:19:27","modified_gmt":"2026-04-27T10:19:27","slug":"bluetooth-hidp-fix-possible-uaf","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=49692","title":{"rendered":"Bluetooth: HIDP: Fix possible UAF_CVE-2026-23462"},"content":{"rendered":"

{“lastseen”:””,”description”:”In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: HIDP: Fix possible UAF\\n\\nThis fixes the following trace caused by not dropping l2cap_conn\\nreference when user-\\u003eremove callback is called:\\n\\n[ 97.809249] l2cap_conn_free: freeing conn ffff88810a171c00\\n[ 97.809907] CPU: 1 UID: 0 PID: 1419 Comm: repro_standalon Not tainted 7.0.0-rc1-dirty #14 PREEMPT(lazy)\\n[ 97.809935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-debian-1.17.0-1 04\/01\/2014\\n[ 97.809947] Call Trace:\\n[ 97.809954] \\u003cTASK\\u003e\\n[ 97.809961] dump_stack_lvl (lib\/dump_stack.c:122)\\n[ 97.809990] l2cap_conn_free (net\/bluetooth\/l2cap_core.c:1808)\\n[ 97.810017] l2cap_conn_del (.\/include\/linux\/kref.h:66 net\/bluetooth\/l2cap_core.c:1821 net\/bluetooth\/l2cap_core.c:1798)\\n[ 97.810055] l2cap_disconn_cfm (net\/bluetooth\/l2cap_core.c:7347 (discriminator 1) net\/bluetooth\/l2cap_core.c:7340 (discriminator 1))\\n[ 97.810086] ? __pfx_l2cap_disconn_cfm (net\/bluetooth\/l2cap_core.c:7341)\\n[ 97.810117] hci_conn_hash_flush (.\/include\/net\/bluetooth\/hci_core.h:2152 (discriminator 2) net\/bluetooth\/hci_conn.c:2644 (discriminator 2))\\n[ 97.810148] hci_dev_close_sync (net\/bluetooth\/hci_sync.c:5360)\\n[ 97.810180] ? __pfx_hci_dev_close_sync (net\/bluetooth\/hci_sync.c:5285)\\n[ 97.810212] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810242] ? up_write (.\/arch\/x86\/include\/asm\/atomic64_64.h:87 (discriminator 5) .\/include\/linux\/atomic\/atomic-arch-fallback.h:2852 (discriminator 5) .\/include\/linux\/atomic\/atomic-long.h:268 (discriminator 5) .\/include\/linux\/atomic\/atomic-instrumented.h:3391 (discriminator 5) kernel\/locking\/rwsem.c:1385 (discriminator 5) kernel\/locking\/rwsem.c:1643 (discriminator 5))\\n[ 97.810267] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810290] ? rcu_is_watching (.\/arch\/x86\/include\/asm\/atomic.h:23 .\/include\/linux\/atomic\/atomic-arch-fallback.h:457 .\/include\/linux\/context_tracking.h:128 kernel\/rcu\/tree.c:752)\\n[ 97.810320] hci_unregister_dev (net\/bluetooth\/hci_core.c:504 net\/bluetooth\/hci_core.c:2716)\\n[ 97.810346] vhci_release (drivers\/bluetooth\/hci_vhci.c:691)\\n[ 97.810375] ? __pfx_vhci_release (drivers\/bluetooth\/hci_vhci.c:678)\\n[ 97.810404] __fput (fs\/file_table.c:470)\\n[ 97.810430] task_work_run (kernel\/task_work.c:235)\\n[ 97.810451] ? __pfx_task_work_run (kernel\/task_work.c:201)\\n[ 97.810472] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810495] ? do_raw_spin_unlock (.\/include\/asm-generic\/qspinlock.h:128 (discriminator 5) kernel\/locking\/spinlock_debug.c:142 (discriminator 5))\\n[ 97.810527] do_exit (kernel\/exit.c:972)\\n[ 97.810547] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810574] ? __pfx_do_exit (kernel\/exit.c:897)\\n[ 97.810594] ? lock_acquire (kernel\/locking\/lockdep.c:470 (discriminator 6) kernel\/locking\/lockdep.c:5870 (discriminator 6) kernel\/locking\/lockdep.c:5825 (discriminator 6))\\n[ 97.810616] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810639] ? do_raw_spin_lock (kernel\/locking\/spinlock_debug.c:95 (discriminator 4) kernel\/locking\/spinlock_debug.c:118 (discriminator 4))\\n[ 97.810664] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810688] ? find_held_lock (kernel\/locking\/lockdep.c:5350 (discriminator 1))\\n[ 97.810721] do_group_exit (kernel\/exit.c:1093)\\n[ 97.810745] get_signal (kernel\/signal.c:3007 (discriminator 1))\\n[ 97.810772] ? security_file_permission (.\/arch\/x86\/include\/asm\/jump_label.h:37 security\/security.c:2366)\\n[ 97.810803] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810826] ? vfs_read (fs\/read_write.c:555)\\n[ 97.810854] ? __pfx_get_signal (kernel\/signal.c:2800)\\n[ 97.810880] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810905] ? __pfx_vfs_read (fs\/read_write.c:555)\\n[ 97.810932] ? srso_alias_return_thunk (arch\/x86\/lib\/retpoline.S:221)\\n[ 97.810960] arch_do_signal_or_restart (arch\/\\n—truncated—“,”published”:”2026-04-03T15:15:41.718Z”,”modified”:”2026-04-27T14:02:39.935Z”,”type”:”cve”,”title”:”Bluetooth: HIDP: Fix possible UAF”,”source”:”Linux”,”references”:”https:\/\/git.kernel.org\/stable\/c\/d955ccbf91ab74d76fe9e4eab2846a7d8a173075\\nhttps:\/\/git.kernel.org\/stable\/c\/18b1263ece6431bd78fa6b61faaef5281203741c\\nhttps:\/\/git.kernel.org\/stable\/c\/21a47a119f33df9bb157326846390d7e8e1b45ba\\nhttps:\/\/git.kernel.org\/stable\/c\/45ebe5b900200ac3e01f3470506a44a447825721\\nhttps:\/\/git.kernel.org\/stable\/c\/7c805b7d1e580eececcc92470292e3dbc42bc3f5\\nhttps:\/\/git.kernel.org\/stable\/c\/f8b6ed2f06d3baa44f347a0fa2af52433f386463\\nhttps:\/\/git.kernel.org\/stable\/c\/4d37fa7582aa960ba23e10a7a2596a29f37ad281\\nhttps:\/\/git.kernel.org\/stable\/c\/dbf666e4fc9bdd975a61bf682b3f75cb0145eedd”,”id”:”CVE-2026-23462″,”bulletinFamily”:””,”cwe”:null,”cvelist”:null,”sourceData”:”Linux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux b4f34d8d9d26b2428fa7cf7c8f97690a297978e6\\nLinux Linux 3.10″,”sourceHref”:””,”cvss”:{“score”:8.8,”severity”:”HIGH”,”vector”:”CVSS:3.1\/AV:A\/AC:L\/PR:N\/UI:N\/S:U\/C:H\/I:H\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Linux”,”version”:”b4f34d8d9d26b2428fa7cf7c8f97690a297978e6″,”vendor”:”Linux”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"

{“lastseen”:””,”description”:”In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: HIDP: Fix possible UAF\\n\\nThis fixes the following trace caused by not dropping l2cap_conn\\nreference when user-\\u003eremove…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,41,12,15,13,7,11,5],"class_list":["post-49692","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-88","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\nBluetooth: HIDP: Fix possible UAF_CVE-2026-23462 - zero redgem<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zero.redgem.net\/?p=49692\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bluetooth: HIDP: Fix possible UAF_CVE-2026-23462 - 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