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CVE-2024-26595 is a NULL pointer dereference in the Linux kernel mlxsw Spectrum ACL TCAM driver error-handling path. When an ACL TCAM region fails to attach to an ACL group, mlxsw_sp_acl_tcam_region_destroy() can be invoked for cleanup and dereference region->group->tcam despite the group pointer being NULL. The corrected implementation obtains the TCAM pointer through mlxsw_sp_acl_to_tcam() instead. The flaw was introduced in Linux kernel 4.11 and is fixed upstream in Linux 6.6.14, 6.7.2, and 6.8-rc1.
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Linux kernel mlxsw Spectrum ACL TCAM NULL-pointer dereference flaw.
A low-impact Linux kernel mlxsw_sp ACL/TCAM error-path NULL-pointer dereference. It is triggered when cleanup runs after attaching a region to an ACL group fails, because the cleanup code dereferences an uninitialized region group pointer. The fix retrieves the TCAM pointer through mlxsw_sp_acl_to_tcam() instead.
A low-severity Linux kernel flaw in the mlxsw Spectrum ACL TCAM driver error path for certain Mellanox hardware. A faulty error handler can cause a null-pointer dereference, resulting in high availability impact/system instability. Red Hat assigns CVSS 5.5 (local attack vector, low privileges required).
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