CVE-2021-26708: Linux Kernel

High severity, CVSS 7.0. EPSS: 1.6% chance of exploitation in the next 30 days.

A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.

Affected products

• Linux Linux Kernel: from 5.5, before 5.10.13 (fixed in 5.10.13)
• Netapp Aff Baseboard Management Controller: affected versions not specified
• Netapp Baseboard Management Controller 500f Firmware: before 15.3 (fixed in 15.3)
• Netapp Baseboard Management Controller a250 Firmware: before 15.3 (fixed in 15.3)
• Netapp Cloud Backup: affected versions not specified
• Netapp Fas Baseboard Management Controller: affected versions not specified
• Netapp Hci h410c Firmware: affected versions not specified
• Netapp Solidfire & Hci Management Node: affected versions not specified
• Netapp Solidfire Baseboard Management Controller: affected versions not specified

Published 2021-02-05. Last modified 2026-06-17.