CVE-2026-98819: Bluetooth: btintel: validate DDC record lengths

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-18 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel: validate DDC record lengths Parse DDC record lengths in unsigned storage so 0xFF does not wrap. Reject records smaller than the mandatory three-byte header, records exceeding U8_MAX, and records exceeding remaining firmware bytes before issuing Intel_Write_DDC. This issue was reported by Claude Mythos.

Affected products

Linux: 4.4 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/069031f569f1681f17e863f48c221a6091b47850
https://git.kernel.org/stable/c/780665bed305718a9fbb10e4aa4d5570d772c9f6
https://git.kernel.org/stable/c/7df748aa9f9ecab514e5989ed89c9ba35b6e5574
https://git.kernel.org/stable/c/93f00db7441eec84a11029662f04b152386107a9
https://git.kernel.org/stable/c/b0fce76873a5e6a6820354409b26693ac5f8b251
https://git.kernel.org/stable/c/c9c15d4d8956df8c564f7c210e4dc5b9b820d97a
https://git.kernel.org/stable/c/e65c8f4ca39959889fcaf9779c3adf1a421aeb8d
https://git.kernel.org/stable/c/f3617369fbb30a4d2e54841ab8e92ca4fa211e56

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