CVE-2024-36007

/// Technical description

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

mlxsw: spectrum_acl_tcam: Fix warning during rehash

As previously explained, the rehash delayed work migrates filters from

one region to another. This is done by iterating over all chunks (all

the filters with the same priority) in the region and in each chunk

iterating over all the filters.

When the work runs out of credits it stores the current chunk and entry

as markers in the per-work context so that it would know where to resume

the migration from the next time the work is scheduled.

Upon error, the chunk marker is reset to NULL, but without resetting the

entry markers despite being relative to it. This can result in migration

being resumed from an entry that does not belong to the chunk being

migrated. In turn, this will eventually lead to a chunk being iterated

over as if it is an entry. Because of how the two structures happen to

be defined, this does not lead to KASAN splats, but to warnings such as

[1].

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References