CVE-2021-26708

Summary

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 Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional References

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13
• https://www.openwall.com/lists/oss-security/2021/02/04/5
• http://www.openwall.com/lists/oss-security/2021/02/05/6
• https://security.netapp.com/advisory/ntap-20210312-0008/
• http://www.openwall.com/lists/oss-security/2021/04/09/2
• http://www.openwall.com/lists/oss-security/2022/01/25/14

References

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13
• https://www.openwall.com/lists/oss-security/2021/02/04/5
• http://www.openwall.com/lists/oss-security/2021/02/05/6
• https://security.netapp.com/advisory/ntap-20210312-0008/
• http://www.openwall.com/lists/oss-security/2021/04/09/2
• http://www.openwall.com/lists/oss-security/2022/01/25/14

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