CVE-2026-68339Bluetooth: btusb: validate Realtek vendor event length
- —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: btusb: validate Realtek vendor event length btusb_recv_event_realtek() reads the event code at data[0] and the Realtek subevent code at data[2] before deciding whether to consume a vendor event as a coredump. For example, the two-byte event ff 00 contains a complete vendor-event header declaring zero parameters. The old classifier still reads a nonexistent third byte and can misclassify the event as a coredump if the adjacent byte is 0x34. Require the HCI event header and first parameter to be present before inspecting the Realtek subevent code. Short events continue through the normal HCI receive path, which owns their protocol validation.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 7 days later
· 7 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 (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 044014ce85a17c0b7fab8e5df0925792010c29b2 – < 8de58bfa26e028f99271dde5a92107cd07f5e063
- affected 044014ce85a17c0b7fab8e5df0925792010c29b2 – < 400267bab0f4076088e163e58cad2bb41c3cf5e7
- affected 044014ce85a17c0b7fab8e5df0925792010c29b2 – < 8881daaafadbe7fb2b7341d16a3949114409c90c
- affected 044014ce85a17c0b7fab8e5df0925792010c29b2 – < 24b0758193d70da47ef8b979153d2a181dbdf34e
- affected 044014ce85a17c0b7fab8e5df0925792010c29b2 – < df541cd485ff80a5ddc579d99687bc7506df9851
- affected 6.6
- unaffected < 6.6
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References5
- https://git.kernel.org/stable/c/8de58bfa26e028f99271dde5a92107cd07f5e063 (opens in a new tab)
- https://git.kernel.org/stable/c/400267bab0f4076088e163e58cad2bb41c3cf5e7 (opens in a new tab)
- https://git.kernel.org/stable/c/8881daaafadbe7fb2b7341d16a3949114409c90c (opens in a new tab)
- https://git.kernel.org/stable/c/24b0758193d70da47ef8b979153d2a181dbdf34e (opens in a new tab)
- https://git.kernel.org/stable/c/df541cd485ff80a5ddc579d99687bc7506df9851 (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-2026-55440 (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-2026-68339)Record last updated .