CVE-2020-36385 Information

Description

An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called aka CID-f5449e74802c.

CVSS Vector

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

Reference

https://syzkaller.appspot.com/bug?id=457491c4672d7b52c1007db213d93e47c711fae6 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5449e74802c1112dea984aec8af7a33c4516af1 https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-ucma_close-2 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10 https://security.netapp.com/advisory/ntap-20210720-0004/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8