Bluetooth: hci_event: fix LE list UAF on reset
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.
CVE-2026-80764
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80764
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "8e68c380290b1dd64a0a512ce66d0264130c46ed",
"versionType": "git"
},
{
"status": "affected",
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "0628cc9b2fa29985a7b8c774741f8a736b0f5e7c",
"versionType": "git"
},
{
"status": "affected",
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "d57702d4c55633c243da5a2fec37ae2ad4adb621",
"versionType": "git"
},
{
"status": "affected",
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "39a3afb91be3cb465f46ce7a8e5696d9e33edf93",
"versionType": "git"
},
{
"status": "affected",
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "b55e83a4ba31d40deae22d4e4dc8c84083e953c6",
"versionType": "git"
},
{
"status": "affected",
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "25b05e3ce31d954540e99954bcc66cbceb27ab35",
"versionType": "git"
},
{
"status": "affected",
"version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
"lessThan": "33af47e847fe4a28b109673affb5874015d54f5a",
"versionType": "git"
},
{
"status": "affected",
"version": "0de8cd646b0152c9ddd10257d8284938d0df0181",
"versionType": "git"
},
{
"status": "affected",
"version": "3.18.3",
"lessThan": "3.19",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/hci_event.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.185",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.154",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.106",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_event.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80764
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34784 · Revision 1
- Added to Heist Feed
- Publisher date