CVE-2020-29369 Information

Description

An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call aka CID-246c320a8cfe.

CVSS Vector

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

Reference

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=246c320a8cfe0b11d81a4af38fa9985ef0cc9a4c https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11 https://bugs.chromium.org/p/project-zero/issues/detail?id=2056 https://security.netapp.com/advisory/ntap-20210115-0001/ http://www.openwall.com/lists/oss-security/2021/02/10/6 http://www.openwall.com/lists/oss-security/2021/02/19/8

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.0