CVE-2024-27435 Affecting kernel-azure package, versions <6.4.0-150600.8.5.4


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-SLES156-KERNELAZURE-7346996
  • published22 Jun 2024
  • disclosed21 Jun 2024

Introduced: 21 Jun 2024

CVE-2024-27435  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 kernel-azure to version 6.4.0-150600.8.5.4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-azure package and not the kernel-azure package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

nvme: fix reconnection fail due to reserved tag allocation

We found a issue on production environment while using NVMe over RDMA, admin_q reconnect failed forever while remote target and network is ok. After dig into it, we found it may caused by a ABBA deadlock due to tag allocation. In my case, the tag was hold by a keep alive request waiting inside admin_q, as we quiesced admin_q while reset ctrl, so the request maked as idle and will not process before reset success. As fabric_q shares tagset with admin_q, while reconnect remote target, we need a tag for connect command, but the only one reserved tag was held by keep alive command which waiting inside admin_q. As a result, we failed to reconnect admin_q forever. In order to fix this issue, I think we should keep two reserved tags for admin queue.

CVSS Scores

version 3.1