Bug 2309801 (CVE-2024-44970) - CVE-2024-44970 kernel: net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink
Summary: CVE-2024-44970 kernel: net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink
Keywords:
Status: NEW
Alias: CVE-2024-44970
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On: 2309815
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-09-04 19:21 UTC by OSIDB Bzimport
Modified: 2024-11-13 23:17 UTC (History)
4 users (show)

Fixed In Version:
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Doc Text:
In Linux kernel net/mlx5e, for SHAMPO, it is possible to receive CQEs with 0 consumed strides for the same WQE even after the WQE is fully consumed and unlinked. This triggers an additional unlink for the same wqe which corrupts the linked list.
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2024:9315 0 None None None 2024-11-12 09:36:43 UTC

Description OSIDB Bzimport 2024-09-04 19:21:25 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink

When all the strides in a WQE have been consumed, the WQE is unlinked
from the WQ linked list (mlx5_wq_ll_pop()). For SHAMPO, it is possible
to receive CQEs with 0 consumed strides for the same WQE even after the
WQE is fully consumed and unlinked. This triggers an additional unlink
for the same wqe which corrupts the linked list.

Fix this scenario by accepting 0 sized consumed strides without
unlinking the WQE again.
Comment 1 Robb Gatica 2024-09-04 20:06:12 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024090456-CVE-2024-44970-f687@gregkh/T
Comment 3 errata-xmlrpc 2024-11-12 09:36:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:9315 https://access.redhat.com/errata/RHSA-2024:9315
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