CVE-2026-98239 Linux kernel lan743x - Use After Free

Linux kernel net: lan743x contains a use-after-free vulnerability caused by improper handling of RX checksum in lan743x_rx_process_buffer, letting attackers cause memory corruption, exploit requires multi-buffer packet reception.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.47% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
6 October 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the 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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