CVE-2026-97977Bluetooth: btusb: Fix UAF of btusb_data by rx_work
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% 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: btusb: Fix UAF of btusb_data by rx_work btusb_close() and btusb_flush() cancel data->rx_work with the asynchronous cancel_delayed_work(), so if btusb_rx_work() is already running on another CPU it keeps running after the cancel returns. btusb_disconnect() calls hci_unregister_dev(), which invokes btusb_close(), and then frees the btusb_data. A still running btusb_rx_work() then dereferences the freed data: while ((skb = skb_dequeue(&data->acl_q))) data->recv_acl(data->hdev, skb); Use cancel_delayed_work_sync() instead. In btusb_close() the cancel also has to happen after btusb_stop_traffic(), otherwise an URB completion racing with the cancel can requeue the work right after it has been waited for.
Timeline
ID reserved
By Linux
Published
- 24 days later
· 24 days 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 – < fc654a72a8d979db15e2773a481e931abaf5a9e8
- affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 – < 5242050195a711e9cd6a9935f689ab6656b94a91
- affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 – < 472d005622525b7be155cac99dde2252b0163bd1
- affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 – < 93b59937bda3fffc6386c79f5544a39bc680c8e8
- affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 – < fa391adb9c755515a89993634745e9079e5ef37c
- affected 800fe5ec302e1ebbf5e3f891f886deecd49c7132 – < 1c12c3117639e78940959d956519c758c57d0849
- affected 5.17
- unaffected < 5.17
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/fc654a72a8d979db15e2773a481e931abaf5a9e8 (opens in a new tab)
- https://git.kernel.org/stable/c/5242050195a711e9cd6a9935f689ab6656b94a91 (opens in a new tab)
- https://git.kernel.org/stable/c/472d005622525b7be155cac99dde2252b0163bd1 (opens in a new tab)
- https://git.kernel.org/stable/c/93b59937bda3fffc6386c79f5544a39bc680c8e8 (opens in a new tab)
- https://git.kernel.org/stable/c/fa391adb9c755515a89993634745e9079e5ef37c (opens in a new tab)
- https://git.kernel.org/stable/c/1c12c3117639e78940959d956519c758c57d0849 (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-2026-86631 (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-2026-97977)Record last updated .