{"id":"CVE-2026-74360","summary":"bpf: Reject exclusive maps for bpf_map_elem iterators","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject exclusive maps for bpf_map_elem iterators\n\nExclusive maps (aka excl_prog_hash) are meant to be reachable only\nfrom the single program whose hash matches. This is enforced by\ncheck_map_prog_compatibility() when the map is referenced from a\nprogram such as signed BPF loaders.\n\nA bpf_map_elem iterator, however, binds its target map at attach\ntime in bpf_iter_attach_map() instead of referencing it from the\nprogram, so the exclusivity check is never reached. On top of that,\nthe iterator exposes the map value as a writable buffer.","modified":"2026-08-18T03:31:21.584330107Z","published":"2026-08-15T05:58:44.158Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74360.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3c56ee343f9412d81918635c3e25e22a5dd6d87e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5cf2c85b1231218a3e3e9f188afb4fe2e17903d5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c3da741d5b2119c61c4498bc936f0fc1dbc3c79b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74360.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74360"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"baefdbdf6812e120c9fba9cfb101d3656f478026"},{"fixed":"5cf2c85b1231218a3e3e9f188afb4fe2e17903d5"},{"fixed":"c3da741d5b2119c61c4498bc936f0fc1dbc3c79b"},{"fixed":"3c56ee343f9412d81918635c3e25e22a5dd6d87e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74360.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74360.json"}}],"schema_version":"1.9.0"}