{"id":"CVE-2026-93173","revision":"4f522d09818a42d18b3a793a52370fe5","records":[{"revision":"4f522d09818a42d18b3a793a52370fe5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93173","aliases":[],"title":"bpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks\n\n__bpf_prog_put_rcu() is the call_rcu() callback for non-sleepable programs.\nsecurity_bpf_prog_free() called from there fires bpf_prog_free in softirq;\nif a sleepable LSM prog is attached to that hook, might_fault() BUGs:\n\n  BUG: sleeping function called from invalid context\n  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5038\n  preempt_count: 101, expected: 0\n  Call Trace:\n   <IRQ>\n   __bpf_prog_enter_sleepable+0x1cd/0x320 kernel/bpf/trampoline.c:1255\n   bpf_trampoline_6442549705+0x53/0xd7\n   security_bpf_prog_free+0xde/0x130 security/security.c:5465\n   __bpf_prog_put_rcu+0xab/0xd0 kernel/bpf/syscall.c:2365\n   rcu_do_batch kernel/rcu/tree.c:2617 [inline]\n   handle_softirqs+0x236/0x800 kernel/softirq.c:622\n   </IRQ>\n\nThe call_rcu/call_rcu_tasks_trace split reflects the freed program's\nsleepability, not that of any attached observer.\n\nsecurity_bpf_prog_free() also frees prog->aux->security, which has to stay\nafter the grace period, so drop bpf_prog_free from sleepable_lsm_hooks\nrather than move the call. Non-sleepable observers still run there.","state":0,"publishedAt":"2026-09-17T16:12:03.229+00:00","modifiedAt":"2026-10-19T09:06:44.824+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/bpf_lsm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1b67772e4e3f16cd647b229cae95fc06d120be08\",\n                            \"lessThan\": \"2135f661fae7160a7fc603cab43cbc7999e8bfce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1b67772e4e3f16cd647b229cae95fc06d120be08\",\n                            \"lessThan\": \"d5f2f741a900123fbcb7c7c0a002b81306fbe242\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1b67772e4e3f16cd647b229cae95fc06d120be08\",\n                            \"lessThan\": \"915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1b67772e4e3f16cd647b229cae95fc06d120be08\",\n                            \"lessThan\": \"2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8\",\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/bpf_lsm.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\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/2135f661fae7160a7fc603cab43cbc7999e8bfce","https://git.kernel.org/stable/c/d5f2f741a900123fbcb7c7c0a002b81306fbe242","https://git.kernel.org/stable/c/915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62","https://git.kernel.org/stable/c/2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93173","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93173","identifiers":["CVE-2026-93173"]},"retained":false,"historicalAffected":[]}],"coverage":[]}