CVE-2026-74360

Technical Description

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

bpf: Reject exclusive maps for bpf_map_elem iterators

Exclusive maps (aka excl_prog_hash) are meant to be reachable only

from the single program whose hash matches. This is enforced by

check_map_prog_compatibility() when the map is referenced from a

program such as signed BPF loaders.

A bpf_map_elem iterator, however, binds its target map at attach

time in bpf_iter_attach_map() instead of referencing it from the

program, so the exclusivity check is never reached. On top of that,

the iterator exposes the map value as a writable buffer.

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