CVE-2026-98633: Linux kernel · Bluetooth: btnxpuart: Fix skb leak in nxp_process_fw_dump()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f2bbb36426581045a8bf7793da5419b9375e4348 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in f2bbb36426581045a8bf7793da5419b9375e4348, edcb84ee607a9ddfc6f2771a7f399115f0b0f19d, 8a36598050cd1e5abb1d5ed42cc224cfcb538c4f
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Linux kernel to f2bbb36426581045a8bf7793da5419b9375e4348, edcb84ee607a9ddfc6f2771a7f399115f0b0f19d or 8a36598050cd1e5abb1d5ed42cc224cfcb538c4f.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in the Linux kernel commits identified by hashes f2bbb36426581045a8bf7793da5419b9375e4348, edcb84ee607a9ddfc6f2771a7f399115f0b0f19d, and 8a36598050cd1e5abb1d5ed42cc224cfcb538c4f. Users should update to a Linux kernel version including these fixes. No additional mitigation is indicated.
Description
A vulnerability in the Linux kernel Bluetooth btnxpuart driver causes a socket buffer (skb) memory leak when CONFIG_DEV_COREDUMP is disabled. This occurs because hci_devcd_append() returns an error without freeing the skb, preventing recovery functions from executing. The issue has been fixed by conditionally calling hci_devcd_append() only when CONFIG_DEV_COREDUMP is enabled.