EUVD-2026-38954
GHSA-39xw-f64j-hqp8
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Triggering needs a local TX stall the attacker cannot reliably control (AV:L/AC:H/PR:L); impact is a race-induced crash, so A:H with no confidentiality or integrity effect.
Primary rating from Vendor (Linux).
CVSS VectorVendor: Linux
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
5DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
net: bcmgenet: fix racing timeout handler
The bcmgenet_timeout handler tries to take down all tx queues when a single queue times out. This is over zealous and causes many race conditions with queues that are still chugging along. Instead lets only restart the timed out queue.
AnalysisAI
Denial of service in the Linux kernel's Broadcom GENET (bcmgenet) Ethernet driver arises because the bcmgenet_timeout handler tears down all transmit queues when only a single queue times out, racing against queues still actively transmitting. The flaw affects systems using Broadcom GENET NICs (e.g. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target to be running the Linux kernel with the bcmgenet driver active on Broadcom GENET Ethernet hardware (e.g. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals conflict sharply and this is a high-CVSS-but-low-real-risk case. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker or adverse network condition induces a transmit stall on one bcmgenet TX queue (for example via heavy or malformed traffic that stalls the NIC), causing the watchdog to fire and the buggy handler to tear down all queues while others are mid-transmission. The resulting race corrupts driver state and can crash or hang the networking stack, producing a denial of service on the affected Broadcom GENET device. … |
| Remediation | Update to a kernel containing the fix: Vendor-released patch versions are 6.1.175, 6.6.141, 6.12.91, 6.18.33 or 7.0.10 (or later) on the corresponding stable branches; pull the specific patch from the kernel.org stable commits (e.g. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running Broadcom GENET NICs (Raspberry Pi 4/CM4, Broadcom set-top boxes) in your infrastructure. …
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External POC / Exploit Code
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