PT-2024-21896 · Linux+8 · Linux Kernel+8
Chunguang Xu
·
Published
2024-03-11
·
Updated
2026-05-26
·
CVE-2024-27435
CVSS v2.0
7.5
High
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a reconnection failure in the Linux kernel when using NVMe over RDMA. The problem occurs due to a potential ABBA deadlock caused by tag allocation. Specifically, the
admin q reconnect fails forever when the remote target and network are okay. This happens because the tag is held by a keep alive request waiting inside admin q, and the only reserved tag is held by the keep alive command. As a result, the reconnect fails. The issue is caused by the allocation of tags, where fabric q shares the tag set with admin q. To fix this issue, it is suggested to keep two reserved tags for the admin queue.Recommendations
To resolve the issue, keep two reserved tags for the admin queue. This will prevent the reconnect failure caused by the ABBA deadlock due to tag allocation.
Exploit
Fix
DoS
Improper Locking
NULL Pointer Dereference
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Related Identifiers
Affected Products
Almalinux
Astra Linux
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu