CVE-2026-97908Bluetooth: btqcomsmd: destroy RPMsg endpoints before freeing hci_dev
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% 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: btqcomsmd: destroy RPMsg endpoints before freeing hci_dev The command and ACL RPMsg endpoints store struct btqcomsmd as their callback private data. The receive callbacks dereference btq->hdev without taking an hci_dev reference. The current teardown order frees the hci_dev before destroying the RPMsg endpoints in both the hci_register_dev() error path and the driver remove path. If WCNSS delivers data in that window, the endpoint callback can run with an already freed hci_dev and pass it to the Bluetooth core. For qcom_smd endpoints, rpmsg_destroy_ept() closes the channel and clears the callback under the channel recv_lock. The receive path holds the same lock while invoking the callback, so destroying the endpoints first both prevents new callbacks and serializes with any callback already running. Destroy the command and ACL endpoints before hci_free_dev(). Keep hci_unregister_dev() first during remove so the HCI core stops issuing operations before the transport endpoints are shut down. In the full registration-error cleanup path, return directly after freeing the hci_dev to avoid falling through to the partial-construction labels and destroying the endpoints twice.
Timeline
ID reserved
By Linux
Published
- 35 days later
· 35 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)
- 0.21% · top 89% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < b9b34cc149f8344d1cffbf318eb1c8cb414f74ac
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < e2a0d9401368ec29bd0cdbfe9545d2a800429875
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < f5e4f81f4e075cd5ec062f81b576b88cdee998d1
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < aaa7f676418e1eb2c4ef0d4e4b07812b25e7b404
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < 962dcc1d8a52e64428cae07806e7f6b8d3ec6ac0
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < 2dcc2240b4e5f6e5dce1736f82666aba40eb3b13
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < 2d016208a011558f211ec9687889df8318654730
- affected 5052de8deff5619a9b7071f00084fd0264b58e17 – < f5a427b16e45210dee656b0860728f3d496dee85
- affected 4.12
- unaffected < 4.12
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/b9b34cc149f8344d1cffbf318eb1c8cb414f74ac (opens in a new tab)
- https://git.kernel.org/stable/c/e2a0d9401368ec29bd0cdbfe9545d2a800429875 (opens in a new tab)
- https://git.kernel.org/stable/c/f5e4f81f4e075cd5ec062f81b576b88cdee998d1 (opens in a new tab)
- https://git.kernel.org/stable/c/aaa7f676418e1eb2c4ef0d4e4b07812b25e7b404 (opens in a new tab)
- https://git.kernel.org/stable/c/962dcc1d8a52e64428cae07806e7f6b8d3ec6ac0 (opens in a new tab)
- https://git.kernel.org/stable/c/2dcc2240b4e5f6e5dce1736f82666aba40eb3b13 (opens in a new tab)
- https://git.kernel.org/stable/c/2d016208a011558f211ec9687889df8318654730 (opens in a new tab)
- https://git.kernel.org/stable/c/f5a427b16e45210dee656b0860728f3d496dee85 (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-2026-86762 (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)
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[](https://cveledger.app/cve/CVE-2026-97908)Record last updated .