{"id":"CVE-2026-74354","revision":"305ef996553643238238831ee11023ec","records":[{"revision":"305ef996553643238238831ee11023ec","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74354","aliases":[],"title":"bpf: Take mmap_lock in zap_pages()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Take mmap_lock in zap_pages()\n\nzap_vma_range() requires the owning mm's mmap_lock to be held.\n\nTaking mmap_read_lock under arena->lock would AB-BA against\narena_vm_close() and arena_map_mmap(), both of which run with\nmmap_write_lock held and then acquire arena->lock. Instead drop\narena->lock, mmget_not_zero() the vma's mm, take mmap_read_lock, and\nre-resolve the vma via find_vma() since it may have been unmapped or\nreplaced while waiting.\n\nTrack processed vmls with a per-call generation in vml->zap_gen and\nserialize zap_pages() callers with a new arena->zap_mutex so\nconcurrent callers on different uaddr ranges do not mark each other's\nvmls processed before the zap is done.","state":0,"publishedAt":"2026-08-15T05:58:40.067+00:00","modifiedAt":"2026-10-16T18:55:34.866+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/bpf/arena.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"317460317a02a1af512697e6e964298dedd8a163\",\n                            \"lessThan\": \"36b1d997866f6083d33934983aa2ce0a184ed642\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"317460317a02a1af512697e6e964298dedd8a163\",\n                            \"lessThan\": \"80b89d0226a05e8b67969de99c31b51fcd54f76a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/bpf/arena.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/36b1d997866f6083d33934983aa2ce0a184ed642","https://git.kernel.org/stable/c/80b89d0226a05e8b67969de99c31b51fcd54f76a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74354","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74354","identifiers":["CVE-2026-74354"]},"retained":false,"historicalAffected":[]}],"coverage":[]}