CVE-2024-50081 Information

Description

In the Linux kernel the following vulnerability has been resolved:

blk-mq: setup queue ->tag_set before initializing hctx

Commit 7b815817aa58 (lk-mq: add helper for checking if one CPU is mapped to specified hctx) needs to check queue mapping via tag set in hctx’s cpuhp handler.

However q->tag_set may not be setup yet when the cpuhp handler is enabled then kernel oops is triggered.

Fix the issue by setup queue tag_set before initializing hctx.

CVSS Vector

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

Reference

https://git.kernel.org/stable/c/d28b256db525d9432bc3eb2c8d83f7d3f5e1cc87 https://git.kernel.org/stable/c/c25c0c9035bb8b28c844dfddeda7b8bdbcfcae95

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5