CVE-2026-80764
- Source
- https://cve.org/CVERecord?id=CVE-2026-80764
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80764.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-80764
- Downstream
- Related
- Published
- 2026-09-04T15:12:36Z
- Modified
- 2026-10-20T02:30:18Z
- Summary
- Bluetooth: hci_event: fix LE list UAF on reset
- Details
-
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 entrylist_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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80764.json" }- References
-
- https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c
- https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35
- https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a
- https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93
- https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed
- https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6
- https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80764.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-80764
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda4d5504d5c39cc84f1f828e19967595597a8136eFixed8e68c380290b1dd64a0a512ce66d0264130c46edFixed0628cc9b2fa29985a7b8c774741f8a736b0f5e7cFixedd57702d4c55633c243da5a2fec37ae2ad4adb621Fixed39a3afb91be3cb465f46ce7a8e5696d9e33edf93Fixedb55e83a4ba31d40deae22d4e4dc8c84083e953c6Fixed25b05e3ce31d954540e99954bcc66cbceb27ab35Fixed33af47e847fe4a28b109673affb5874015d54f5a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced3.18.3Fixed3.19
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0de8cd646b0152c9ddd10257d8284938d0df0181
Affected versions
v3.*
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced3.19.0Fixed6.1.185
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.154
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.106
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.18.47
- Type
- ECOSYSTEM
- Events
-
Introduced6.19.0Fixed7.1.11
- Type
- ECOSYSTEM
- Events
-
Introduced7.2.0Fixed7.2.1