CVE-2026-64118

/// Technical description

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

qed: fix double free in qed_cxt_tables_alloc()

If one of the later PF or VF CID bitmap allocations fails,

qed_cid_map_alloc() jumps to cid_map_fail and frees the previously

allocated CID bitmaps before returning an error. qed_cxt_tables_alloc()

then calls qed_cxt_mngr_free(), which invokes qed_cid_map_free()

again.

Fix this by setting each CID bitmap pointer to NULL after bitmap_free()

to avoid double free.

The bug was first flagged by an experimental analysis tool we are

developing for kernel memory-management bugs while analyzing

v6.13-rc1. The tool is still under development and is not yet publicly

available. Manual inspection confirms that the bug is still

present in v7.1-rc3.

Runtime reproduction was not attempted because exercising the failing

allocation path requires device-specific setup.

/// 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