SB20261023140 - Race condition in Linux kernel ethernet xilinx driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-99028)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to corrupt freed memory through DMA writes, potentially causing a denial of service.

The vulnerability exists due to a race condition between axienet_dma_rx_cb() and axienet_stop() in the Xilinx AXI Ethernet driver's dmaengine path when receive-buffer resubmission overlaps interface teardown. A local privileged user can trigger interface shutdown during receive processing, if permitted, to leave the DMA engine writing into a buffer freed by teardown, potentially corrupting memory and causing a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/079396129da5e7cb40ca0920aa1b9525bef6097c
• https://git.kernel.org/stable/c/5e5cf3ad7c099ff86ea9e422cddb25a2e5317b58
• https://git.kernel.org/stable/c/bcf2573a68a808a5b54cadafa72b6672e662c2bf
• https://git.kernel.org/stable/c/eececf7c3a679d9c08175ad6bacbc8c31848f5af