CVE-2024-49855 Information

Description

In the Linux kernel the following vulnerability has been resolved:

nbd: fix race between timeout and normal completion

If request timetout is handled by nbd_requeue_cmd() normal completion has to be stopped for avoiding to complete this requeued request other use-after-free can be triggered.

Fix the race by clearing NBD_CMD_INFLIGHT in nbd_requeue_cmd() meantime make sure that cmd->lock is grabbed for clearing the flag and the requeue.

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/stable/c/9c25faf72d780a9c71081710cd48759d61ff6e9b https://git.kernel.org/stable/c/6e73b946a379a1dfbb62626af93843bdfb53753d https://git.kernel.org/stable/c/5236ada8ebbd9e7461f17477357582f5be4f46f7 https://git.kernel.org/stable/c/9a74c3e6c0d686c26ba2aab66d15ddb89dc139cc https://git.kernel.org/stable/c/c9ea57c91f03bcad415e1a20113bdb2077bcf990

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