CVE-2026-74302Bluetooth: hci_core: Fix UAF in hci_unregister_dev()
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 96600c2e5ee8213dbab5df1617293d8e847bb4fa – < c277f624cd99e4f0e0223fd039b7615feea4afdc
- affected d6cbce18370641a21dd889e8613d8153df15eb39 – < bce2eec05bce548b548aca52c1834540f97d5d60
- affected 0d151a103775dd9645c78c97f77d6e2a5298d913 – < 48c7ad6afcc58c2cda11fed39791708103b6a644
- affected 0d151a103775dd9645c78c97f77d6e2a5298d913 – < a0fd1086a57b982f8c24ae4ab165c2af39fe1735
- affected 0d151a103775dd9645c78c97f77d6e2a5298d913 – < 672d52d9412252e61b8de8d773ccdf5a277cf540
- affected 0d151a103775dd9645c78c97f77d6e2a5298d913 – < 5edcc018fa6e80b2c478454a4a8229c23d67c181
- affected 48542881997e17b49dc16b93fe910e0cfcf7a9f9
- affected 9cfc84b1d464cc024286f42a090718f9067b80ed
- affected ddeda6ca5f218b668b560d90fc31ae469adbfd92
- affected d2ce562a5aff1dcd0c50d9808ea825ef90da909f
- affected 3f939bd73fed12dddc2a32a76116c19ca47c7678
- affected 6.1.101 – < 6.1.191
- affected 6.6.42 – < 6.6.160
- affected 4.19.319 – < 4.20
- affected 5.4.281 – < 5.5
- affected 5.10.223 – < 5.11
- affected 5.15.164 – < 5.16
- affected 6.9.11 – < 6.10
- affected 6.10
- unaffected < 6.10
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/c277f624cd99e4f0e0223fd039b7615feea4afdc (opens in a new tab)
- https://git.kernel.org/stable/c/bce2eec05bce548b548aca52c1834540f97d5d60 (opens in a new tab)
- https://git.kernel.org/stable/c/48c7ad6afcc58c2cda11fed39791708103b6a644 (opens in a new tab)
- https://git.kernel.org/stable/c/a0fd1086a57b982f8c24ae4ab165c2af39fe1735 (opens in a new tab)
- https://git.kernel.org/stable/c/672d52d9412252e61b8de8d773ccdf5a277cf540 (opens in a new tab)
- https://git.kernel.org/stable/c/5edcc018fa6e80b2c478454a4a8229c23d67c181 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59449 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74302)Record last updated .