Race Condition Affecting kernel-default-man package, versions <4.12.14-150.78.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-SLES150-KERNELDEFAULTMAN-2662350
  • published14 Apr 2022
  • disclosed7 Dec 2021

Introduced: 7 Dec 2021

CVE-2021-3640  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade SLES:15.0 kernel-default-man to version 4.12.14-150.78.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default-man package and not the kernel-default-man package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

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.

CVSS Scores

version 3.1