CVE-2024-56660

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

net/mlx5: DR, prevent potential error pointer dereference

The dr_domain_add_vport_cap() function generally returns NULL on error but sometimes we want it to return ERR_PTR(-EBUSY) so the caller can retry. The problem here is that ret can be either -EBUSY or -ENOMEM and if its and -ENOMEM then the error pointer is propogated back and eventually dereferenced in dr_ste_v0_build_src_gvmi_qpn_tag().

Weakness

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Affected Software

Potential Mitigations

References

• https://git.kernel.org/stable/c/11776cff0b563c8b8a4fa76cab620bfb633a8cb8
• https://git.kernel.org/stable/c/325cf73a1b449fea3158ab99d03a7a717aad1618
• https://git.kernel.org/stable/c/61f720e801443d4e2a3c0261eda4ad8431458dca
• https://git.kernel.org/stable/c/a59c61a1869ceefc65ef02886f91e8cd0062211f