CVE-2025-40318Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once
- 8.8HighCVSS base score
- 0.29%Exploitation in 30 daysEPSS · top 78% 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_sync: fix race in hci_cmd_sync_dequeue_once hci_cmd_sync_dequeue_once() does lookup and then cancel the entry under two separate lock sections. Meanwhile, hci_cmd_sync_work() can also delete the same entry, leading to double list_del() and "UAF". Fix this by holding cmd_sync_work_lock across both lookup and cancel, so that the entry cannot be removed concurrently.
Timeline
ID reserved
By Linux
- 8 months later
· 8 months later
Published
- 10 months later
· 10 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 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (14 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 8.8.
Affected products
- affected f00f36db76eb8fd10d13e80e2590f23b5beaa54d – < 0a94f7e017438935c09ef833a1aa908ad9875213
- affected 1499f79995c7ee58e3bfeeff75f6d1b37dcda881 – < 932c0a4f77ac13e526fdd5b42914d29c9821d389
- affected 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 – < ae76cf6c2c842944c6514c57df54d728f1916553
- affected 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 – < 9cd536970192b72257afcdfba0bfc09993e6f19c
- affected 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 – < 09b0cd1297b4dbfe736aeaa0ceeab2265f47f772
- affected 357603f4d396d85fbf0045512efaf1d7f7394ed7
- affected 6.1.120 – < 6.1.159
- affected 6.6.51 – < 6.6.117
- affected 6.8.9 – < 6.9
- affected 6.9
- unaffected < 6.9
- unaffected 6.1.159 – ≤ 6.1.*
- unaffected 6.6.117 – ≤ 6.6.*
- unaffected 6.12.58 – ≤ 6.12.*
- unaffected 6.17.8 – ≤ 6.17.*
- unaffected 6.18 – ≤ *
References
References5
- https://git.kernel.org/stable/c/0a94f7e017438935c09ef833a1aa908ad9875213 (opens in a new tab)
- https://git.kernel.org/stable/c/932c0a4f77ac13e526fdd5b42914d29c9821d389 (opens in a new tab)
- https://git.kernel.org/stable/c/ae76cf6c2c842944c6514c57df54d728f1916553 (opens in a new tab)
- https://git.kernel.org/stable/c/9cd536970192b72257afcdfba0bfc09993e6f19c (opens in a new tab)
- https://git.kernel.org/stable/c/09b0cd1297b4dbfe736aeaa0ceeab2265f47f772 (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-2025-201627 (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-2025-40318)Record last updated .