Bluetooth: hci_event: fix LE list UAF on reset
Summary
| CVE | CVE-2026-80764 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-04 16:18:01 UTC |
| Updated | 2026-09-04 16:18:01 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix LE list UAF on reset hci_cc_reset() clears the LE accept and resolving lists without taking hdev->lock. Other command-complete handlers serialize updates to these lists with that lock, and the debugfs readers hold it while walking them. This permits the reset completion and a debugfs read to interleave as follows: hci_rx_work debugfs reader ----------- -------------- lock hdev->lock fetch current entry list_del(entry) kfree(entry) read entry fields The reader then dereferences a freed list entry and may follow its stale next pointer. KASAN reported: BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180 Read of size 1 at addr ffff8881015dab16 by task poc/95 Call Trace: white_list_show+0x15f/0x180 seq_read_iter+0x3ff/0x1190 seq_read+0x267/0x3d0 vfs_read+0x177/0xa20 ksys_read+0xf7/0x1c0 Allocated by task 91: hci_bdaddr_list_add+0x1a6/0x3a0 hci_cc_le_add_to_accept_list+0xab/0x140 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730 Freed by task 90: kfree+0x131/0x3c0 hci_bdaddr_list_clear+0xd8/0x160 hci_cc_reset+0x28a/0x370 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730 Take hdev->lock around both list clears. This matches the existing mutation and traversal locking convention. |
Risk And Classification
EPSS: 0.001730000 probability, percentile 0.068300000 (date 2026-09-07)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected a4d5504d5c39cc84f1f828e19967595597a8136e 8e68c380290b1dd64a0a512ce66d0264130c46ed git | Not specified |
| CNA | Linux | Linux | affected a4d5504d5c39cc84f1f828e19967595597a8136e 0628cc9b2fa29985a7b8c774741f8a736b0f5e7c git | Not specified |
| CNA | Linux | Linux | affected a4d5504d5c39cc84f1f828e19967595597a8136e d57702d4c55633c243da5a2fec37ae2ad4adb621 git | Not specified |
| CNA | Linux | Linux | affected a4d5504d5c39cc84f1f828e19967595597a8136e 39a3afb91be3cb465f46ce7a8e5696d9e33edf93 git | Not specified |
| CNA | Linux | Linux | affected a4d5504d5c39cc84f1f828e19967595597a8136e b55e83a4ba31d40deae22d4e4dc8c84083e953c6 git | Not specified |
| CNA | Linux | Linux | affected a4d5504d5c39cc84f1f828e19967595597a8136e 25b05e3ce31d954540e99954bcc66cbceb27ab35 git | Not specified |
| CNA | Linux | Linux | affected a4d5504d5c39cc84f1f828e19967595597a8136e 33af47e847fe4a28b109673affb5874015d54f5a git | Not specified |
| CNA | Linux | Linux | affected 0de8cd646b0152c9ddd10257d8284938d0df0181 git | Not specified |
| CNA | Linux | Linux | affected 3.18.3 3.19 semver | Not specified |
| CNA | Linux | Linux | affected 3.19 | Not specified |
| CNA | Linux | Linux | unaffected 3.19 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.185 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.154 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.106 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.47 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.11 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.1 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.