Is CVE-2026-98633 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-98633 being exploited in the wild.

How severe is CVE-2026-98633?

Informational severity, published 18 October 2026.

Which products and versions are affected?

Unknown Linux kernel All versions with btnxpuart driver coredump support (since 998e447f443f).

Is there a fix for CVE-2026-98633?

A patch was published on 2026-10-03. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-98633 attacked?

It is attacked with local access, in an operating system.

Am I affected by CVE-2026-98633?

Check whether you run Unknown Linux kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-98633: Linux kernel Bluetooth btnxpuart memory leak in firmware dump

CVE-2026-98633 · Severity: info · Published 2026-10-18

The Linux kernel's Bluetooth NXP UART driver leaks memory when processing firmware dumps on systems with coredump support disabled. This causes memory to accumulate over time and can prevent the Bluetooth device from recovering properly after errors, potentially leading to connectivity issues.

Technologies: Unknown Linux kernel. Vendors: Unknown.

Quick answers

Is CVE-2026-98633 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-98633 being exploited in the wild.
How severe is CVE-2026-98633?: Informational severity, published 18 October 2026.
Which products and versions are affected?: Unknown Linux kernel All versions with btnxpuart driver coredump support (since 998e447f443f).
Is there a fix for CVE-2026-98633?: A patch was published on 2026-10-03. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-98633 attacked?: It is attacked with local access, in an operating system.
Am I affected by CVE-2026-98633?: Check whether you run Unknown Linux kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A socket buffer (skb) is leaked in the nxp_process_fw_dump() function when CONFIG_DEV_COREDUMP is disabled; hci_devcd_append() returns an error without freeing the cloned skb argument, and the function fails to call nxp_set_ind_reset() for device recovery. The fix guards the hci_devcd_append() call with IS_ENABLED(CONFIG_DEV_COREDUMP) to prevent the leak and ensure recovery is attempted.

Affected products

<UNKNOWN> Linux kernel All versions with btnxpuart driver coredump support (since 998e447f443f)

Timeline

2026-10-18: disclosed
2026-10-03: patched

References

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