CVE ID:	CVE-2021-3640
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.
Test IDs:	1.3.6.1.4.1.25623.1.0.705096   1.3.6.1.4.1.25623.1.0.892940   1.3.6.1.4.1.25623.1.0.892941
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-3640 DSA-5096 https://www.debian.org/security/2022/dsa-5096 [debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security update https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html [debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html https://bugzilla.redhat.com/show_bug.cgi?id=1980646 https://bugzilla.redhat.com/show_bug.cgi?id=1980646 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/bluetooth/sco.c?h=v5.16&id=99c23da0eed4fd20cae8243f2b51e10e66aa0951 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/bluetooth/sco.c?h=v5.16&id=99c23da0eed4fd20cae8243f2b51e10e66aa0951 https://github.com/torvalds/linux/commit/99c23da0eed4fd20cae8243f2b51e10e66aa0951 https://github.com/torvalds/linux/commit/99c23da0eed4fd20cae8243f2b51e10e66aa0951 https://security.netapp.com/advisory/ntap-20220419-0003/ https://security.netapp.com/advisory/ntap-20220419-0003/ https://ubuntu.com/security/CVE-2021-3640 https://ubuntu.com/security/CVE-2021-3640 https://www.openwall.com/lists/oss-security/2021/07/22/1 https://www.openwall.com/lists/oss-security/2021/07/22/1