CVE-2021-26708

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.

CVSS v3.1

7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

6.9 MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C

EPSS

1.59% chance of exploitation in the next 30 days, 74th percentile

Published

2021-02-05

Updated

2024-08-03

Proof-of-concept exploits (4)

• http://www.openwall.com/lists/oss-security/2022/01/25/14
• azpema/CVE-2021-267080★ · 2021-06-12
• hardenedvault/vault_range_poc47★ · 2025-04-05
• jordan9001/vsock_poc28★ · 2021-02-16

References

• CVE Record
• NVD entry

Related

• CVE-2021-22555
• CVE-2022-0847
• CVE-2022-2639
• CVE-2022-34918
• CVE-2021-26705
• CVE-2021-26709