Not yet scoredPublished Oct 18, 2026

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

Updated under an hour ago (2026-10-19 10:10 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: stop Tx NAPI before disabling the queues bcmgenet_netif_stop() and the Wake-on-LAN branch of bcmgenet_suspend() both disable the Tx queues first and stop Tx NAPI several steps later. A completion in flight calls netif_tx_wake_queue() in between, and nothing stops the queue again, so a transmit can reach the rings after they have been freed. Close is safe because dev_deactivate_many() stops the qdisc first. bcmgenet_suspend() does not, so stop Tx NAPI before the queues on both paths. KASAN on a Raspberry Pi CM4, driven from an MTU change because suspend freezes user space before the callback runs: BUG: KASAN: use-after-free in bcmgenet_xmit+0x17f8/0x2258 Write of size 8 at addr ffffff8055844a68 by task ksoftirqd/0/14 bcmgenet_xmit+0x17f8/0x2258 dev_hard_start_xmit+0x13c/0x588 sch_direct_xmit+0x108/0x340 __dev_queue_xmit+0x1190/0x3848

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 18, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	254f3239dd070e469f45c3ca8b6ac38e47d6c730 builds before 63bcc2fee6419963e45e7c2cd698fa862409601d; from 254f3239dd070e469f45c3ca8b6ac38e47d6c730 before f329d42423089904758f2685cda295de9bf99441; 254f3239dd070e469f45c3ca8b6ac38e47d6c730 builds before 7e87508b5c4d81210d0a736ed01962e52f5c4c56	CNA record

References

https://git.kernel.org/stable/c/63bcc2fee6419963e45e7c2cd698fa862409601d
https://git.kernel.org/stable/c/f329d42423089904758f2685cda295de9bf99441
https://git.kernel.org/stable/c/7e87508b5c4d81210d0a736ed01962e52f5c4c56

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.