CVE-2021-3640

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.

Link	Resource
https://github.com/torvalds/linux/commit/99c23da0eed4fd20cae8243f2b51e10e66aa0951	Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1980646	Issue Tracking Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/bluetooth/sco.c?h=v5.16&id=99c23da0eed4fd20cae8243f2b51e10e66aa0951	Patch Vendor Advisory
https://www.openwall.com/lists/oss-security/2021/07/22/1	Exploit Mailing List
https://ubuntu.com/security/CVE-2021-3640	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html	Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5096	Third Party Advisory
https://security.netapp.com/advisory/ntap-20220419-0003/	Third Party Advisory

Configuration 1

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*

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Published : 2022-03-03 11:15

Updated : 2023-02-12 11:41

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NVD link : CVE-2021-3640

Mitre link : CVE-2021-3640

Fedora

Fedoraproject

CWE-362

CWE-416