CVE-2026-74360

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.