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CVE-2021-3640

Published: Mar 3, 2022

Modified: Aug 3, 2024

PUBLISHED

Description

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.

Vendor	Product	Versions
n/a	kernel	affected `Affects kernel v5.15.3 and prior, Fixed in v5.16-rc1 and above.`

Weaknesses (CWE)

References

https://bugzilla.redhat.com/show_bug.cgi?id=1980646

x_refsource_MISC

https://ubuntu.com/security/CVE-2021-3640

x_refsource_MISC

https://www.openwall.com/lists/oss-security/2021/07/22/1

x_refsource_MISC

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/bluetooth/sco.c?h=v5.16&id=99c23da0eed4fd20cae8243f2b51e10e66aa0951

x_refsource_MISC

https://github.com/torvalds/linux/commit/99c23da0eed4fd20cae8243f2b51e10e66aa0951

x_refsource_MISC

[debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security update

mailing-list

x_refsource_MLIST

[debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update

mailing-list

x_refsource_MLIST

vendor-advisory

x_refsource_DEBIAN

https://security.netapp.com/advisory/ntap-20220419-0003/

x_refsource_CONFIRM

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