CVE-2026-98601Bluetooth: btintel_pcie: validate device-supplied DMA indices
- —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: btintel_pcie: validate device-supplied DMA indices In btintel_pcie_msix_rx_handle(), the driver processes RX completion descriptors (urbd1) written by the PCIe device into DMA-coherent memory. urbd1->frbd_tag (a 16-bit field fully controlled by the device firmware via DMA) is used directly as an array index into rxq->bufs[] without any bounds check. rxq->bufs[] has only BTINTEL_PCIE_RX_DESCS_COUNT (64) entries, while frbd_tag can be any value 0-65535. A malicious or malfunctioning device can write an out-of-range frbd_tag, causing the driver to dereference an out-of-bounds data_buf pointer. Additionally, cr_hia is read from a DMA-shared index array also writable by the device; if the device sets cr_hia >= rxq->count, the while-loop never terminates because cr_tia is wrapped via modulo rxq->count and can never equal an out-of-range cr_hia. Add bounds validation for cr_hia and frbd_tag in the RX path, and cr_hia in the TX path. Log invalid values with bt_dev_err before returning.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 1 day later
· 1 day 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 c2b636b3f788d10486a6691ad6dd3ec4c93bd78e – < f42cd95e679d5b78611cd2208cd1c41ad0045ffa
- affected c2b636b3f788d10486a6691ad6dd3ec4c93bd78e – < 8ec5838a35b03ac0cf3602452a369898051ffaf9
- affected c2b636b3f788d10486a6691ad6dd3ec4c93bd78e – < b29b70bfa12133423924fcd0327c19a802f7e368
- affected c2b636b3f788d10486a6691ad6dd3ec4c93bd78e – < 37a11129345337efd6eef8e62b03b6348cd0dd8b
- affected 6.10
- unaffected < 6.10
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.55 – ≤ 6.18.*
- unaffected 7.2.9 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References4
- https://git.kernel.org/stable/c/f42cd95e679d5b78611cd2208cd1c41ad0045ffa (opens in a new tab)
- https://git.kernel.org/stable/c/8ec5838a35b03ac0cf3602452a369898051ffaf9 (opens in a new tab)
- https://git.kernel.org/stable/c/b29b70bfa12133423924fcd0327c19a802f7e368 (opens in a new tab)
- https://git.kernel.org/stable/c/37a11129345337efd6eef8e62b03b6348cd0dd8b (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-2026-103646 (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-2026-98601)Record last updated .