VulnerabilityPublished 18 Oct 2026

CVE-2026-98574: Linux kernel · net: bcmgenet: stop Tx NAPI before disabling the queues

Source GCVE Database

Authoritative record:CVE-2026-98574· Medium

Not known to be exploited · fixed in f329d42423089904758f2685cda295de9bf99441 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f329d42423089904758f2685cda295de9bf99441, 63bcc2fee6419963e45e7c2cd698fa862409601d, 7e87508b5c4d81210d0a736ed01962e52f5c4c56

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-rfvr-hxpg-f67j

What to do

Upgrade Linux kernel to f329d42423089904758f2685cda295de9bf99441, 63bcc2fee6419963e45e7c2cd698fa862409601d or 7e87508b5c4d81210d0a736ed01962e52f5c4c56.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 254f3239dd070e469f45c3ca8b6ac38e47d6c730, < f329d42423089904758f2685cda295de9bf99441	Fixed in f329d42423089904758f2685cda295de9bf99441
LinuxLinux	Affected ≥ 254f3239dd070e469f45c3ca8b6ac38e47d6c730, < 63bcc2fee6419963e45e7c2cd698fa862409601d	Fixed in 63bcc2fee6419963e45e7c2cd698fa862409601d
LinuxLinux	Affected ≥ 254f3239dd070e469f45c3ca8b6ac38e47d6c730, < 7e87508b5c4d81210d0a736ed01962e52f5c4c56	Fixed in 7e87508b5c4d81210d0a736ed01962e52f5c4c56
LinuxLinux	Affected =6.15	Fixed in–

AI-suggested

A fix has been implemented to stop Tx NAPI before disabling the Tx queues in the bcmgenet driver. Users should apply the official Linux kernel updates that include this patch. Since this is a kernel-level fix, updating to a patched kernel version is the recommended remediation. Patch status is not explicitly stated in the input data, so check the vendor or Linux kernel advisory for the exact fixed versions and update accordingly.

Description

A use-after-free vulnerability in the Linux kernel's bcmgenet network driver was resolved. The issue occurs because the transmit (Tx) NAPI is stopped after disabling the Tx queues, allowing a transmit operation to access freed memory. This was observed on a Raspberry Pi CM4 during suspend operations triggered by an MTU change. The fix involves stopping Tx NAPI before disabling the queues to prevent use-after-free conditions.

References

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