CVE-2020-29374 Information

Description

An issue was discovered in the Linux kernel before 5.7.3 related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation when used for a copy-on-write page does not properly consider the semantics of read operations and therefore can grant unintended write access aka CID-17839856fd58.

CVSS Vector

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

Reference

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 https://security.netapp.com/advisory/ntap-20210115-0002/ http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html https://www.debian.org/security/2022/dsa-5096 https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

3.6