CVE-2026-98050 Linux Kernel mlxsw spectrum_ptp - Race Condition

Linux kernel contains a race condition in mlxsw spectrum_ptp component caused by unsafe concurrent calls to napi_gro_receive() from GC workqueue context, letting attackers cause kernel panic and denial of service, exploit requires triggering unmatched PTP entries during concurrent NAPI poll.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Race Condition
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
25 September 2026
Updated
15 October 2026
Weakness
CWE-362

Vendor fix

Update to the latest Linux kernel version containing the patch for mlxsw spectrum_ptp napi_gro_receive() call fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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