cvedb.io
CVE-2021-3640
HIGH · CVSS 7
EPSS exploitation probability: 0%
Published 2022-03-03T23:15:08.197 · Last modified 2026-06-17T04:05:29.397

Summary

A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.

Affected products

linux — linux_kernel

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.