Bluetooth: hci_core: Fix UAF in hci_unregister_dev()
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix UAF in hci_unregister_dev() hci_unregister_dev() does not disable cmd_timer and ncmd_timer before the hci_dev structure is freed. If a timeout fires during device teardown, the callback dereferences freed memory (including the hdev->reset function pointer), leading to a use-after-free. Add disable_delayed_work_sync() calls alongside the existing disable_work_sync() calls to ensure both timers are fully quiesced before teardown proceeds.
CVE-2026-74302
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-2026-74302
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": "d6cbce18370641a21dd889e8613d8153df15eb39",
"lessThan": "bce2eec05bce548b548aca52c1834540f97d5d60",
"versionType": "git"
},
{
"status": "affected",
"version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
"lessThan": "48c7ad6afcc58c2cda11fed39791708103b6a644",
"versionType": "git"
},
{
"status": "affected",
"version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
"lessThan": "a0fd1086a57b982f8c24ae4ab165c2af39fe1735",
"versionType": "git"
},
{
"status": "affected",
"version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
"lessThan": "672d52d9412252e61b8de8d773ccdf5a277cf540",
"versionType": "git"
},
{
"status": "affected",
"version": "0d151a103775dd9645c78c97f77d6e2a5298d913",
"lessThan": "5edcc018fa6e80b2c478454a4a8229c23d67c181",
"versionType": "git"
},
{
"status": "affected",
"version": "48542881997e17b49dc16b93fe910e0cfcf7a9f9",
"versionType": "git"
},
{
"status": "affected",
"version": "9cfc84b1d464cc024286f42a090718f9067b80ed",
"versionType": "git"
},
{
"status": "affected",
"version": "ddeda6ca5f218b668b560d90fc31ae469adbfd92",
"versionType": "git"
},
{
"status": "affected",
"version": "d2ce562a5aff1dcd0c50d9808ea825ef90da909f",
"versionType": "git"
},
{
"status": "affected",
"version": "96600c2e5ee8213dbab5df1617293d8e847bb4fa",
"versionType": "git"
},
{
"status": "affected",
"version": "3f939bd73fed12dddc2a32a76116c19ca47c7678",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.42",
"lessThan": "6.6.160",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.319",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.281",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.223",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.164",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.101",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.9.11",
"lessThan": "6.10",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/hci_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74302
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46541 · Revision 1
- Added to Heist Feed
- Publisher date