CVE-2020-11884

high

Description

In the Linux kernel 4.19 through 5.6.7 on the s390 platform, code execution may occur because of a race condition, as demonstrated by code in enable_sacf_uaccess in arch/s390/lib/uaccess.c that fails to protect against a concurrent page table upgrade, aka CID-3f777e19d171. A crash could also occur.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3f777e19d171670ab558a6d5e6b1ac7f9b6c574f

https://www.debian.org/security/2020/dsa-4667

https://usn.ubuntu.com/4343-1/

https://lists.fedoraproject.org/archives/list/[email protected]/message/ZKVJMS4GQRH5SO35WM5GINCFAGXQ3ZW6/

https://lists.fedoraproject.org/archives/list/[email protected]/message/AQUVKC3IPUC5B374VVAZV4J5P3GAUGSW/

https://lists.fedoraproject.org/archives/list/[email protected]/message/3TZBP2HINNAX7HKHCOUMIFVQPV6GWMCZ/

https://usn.ubuntu.com/4345-1/

https://usn.ubuntu.com/4342-1/

https://security.netapp.com/advisory/ntap-20200608-0001/

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=215d1f3928713d6eaec67244bcda72105b898000

Details

Source: MITRE

Published: 2020-04-29

Updated: 2022-10-29

Type: CWE-362

Risk Information

CVSS v2

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 7

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1

Severity: HIGH