VulnerabilityPublished 18 Oct 2026

CVE-2026-98633: Linux kernel · Bluetooth: btnxpuart: Fix skb leak in nxp_process_fw_dump()

Source GCVE Database

Authoritative record:CVE-2026-98633· Low

Not known to be exploited · fixed in f2bbb36426581045a8bf7793da5419b9375e4348 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Low

Rated by Threat Radar · 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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-xvhg-mjvc-rxvr

What to do

Upgrade Linux kernel to f2bbb36426581045a8bf7793da5419b9375e4348, edcb84ee607a9ddfc6f2771a7f399115f0b0f19d or 8a36598050cd1e5abb1d5ed42cc224cfcb538c4f.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 998e447f443f138c90faa6ff3845082af419070e, < f2bbb36426581045a8bf7793da5419b9375e4348	Fixed in f2bbb36426581045a8bf7793da5419b9375e4348
LinuxLinux	Affected ≥ 998e447f443f138c90faa6ff3845082af419070e, < edcb84ee607a9ddfc6f2771a7f399115f0b0f19d	Fixed in edcb84ee607a9ddfc6f2771a7f399115f0b0f19d
LinuxLinux	Affected ≥ 998e447f443f138c90faa6ff3845082af419070e, < 8a36598050cd1e5abb1d5ed42cc224cfcb538c4f	Fixed in 8a36598050cd1e5abb1d5ed42cc224cfcb538c4f
LinuxLinux	Affected =6.15	Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel to guard the problematic function call with a configuration check. Users should update to the patched kernel version containing this fix. No additional mitigation is indicated.

Description

A vulnerability in the Linux kernel Bluetooth btnxpuart driver caused a memory leak when CONFIG_DEV_COREDUMP was disabled. Specifically, the function hci_devcd_append() returned an error without freeing a cloned socket buffer (skb), leading to a leak and preventing a recovery function from being called. This issue has been fixed by adding a guard to the function call based on the CONFIG_DEV_COREDUMP configuration.

Impact

The vulnerability results in a memory leak of cloned socket buffers in the Bluetooth btnxpuart driver when CONFIG_DEV_COREDUMP is disabled. Additionally, it prevents a recovery function from being called, which could affect device stability or recovery processes related to Bluetooth firmware dumps. There is no indication of remote code execution or privilege escalation from the provided data.

References

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