{"id":"CVE-2024-26591","summary":"bpf: Fix re-attachment branch in bpf_tracing_prog_attach","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix re-attachment branch in bpf_tracing_prog_attach\n\nThe following case can cause a crash due to missing attach_btf:\n\n1) load rawtp program\n2) load fentry program with rawtp as target_fd\n3) create tracing link for fentry program with target_fd = 0\n4) repeat 3\n\nIn the end we have:\n\n- prog-\u003eaux-\u003edst_trampoline == NULL\n- tgt_prog == NULL (because we did not provide target_fd to link_create)\n- prog-\u003eaux-\u003eattach_btf == NULL (the program was loaded with attach_prog_fd=X)\n- the program was loaded for tgt_prog but we have no way to find out which one\n\n    BUG: kernel NULL pointer dereference, address: 0000000000000058\n    Call Trace:\n     \u003cTASK\u003e\n     ? __die+0x20/0x70\n     ? page_fault_oops+0x15b/0x430\n     ? fixup_exception+0x22/0x330\n     ? exc_page_fault+0x6f/0x170\n     ? asm_exc_page_fault+0x22/0x30\n     ? bpf_tracing_prog_attach+0x279/0x560\n     ? btf_obj_id+0x5/0x10\n     bpf_tracing_prog_attach+0x439/0x560\n     __sys_bpf+0x1cf4/0x2de0\n     __x64_sys_bpf+0x1c/0x30\n     do_syscall_64+0x41/0xf0\n     entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\nReturn -EINVAL in this situation.","modified":"2026-04-02T10:04:17.591497Z","published":"2024-02-22T16:21:43.756Z","related":["SUSE-SU-2024:0855-1","SUSE-SU-2024:0858-1","SUSE-SU-2024:0900-1","SUSE-SU-2024:0900-2","SUSE-SU-2024:0910-1","SUSE-SU-2024:0977-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26591.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/50ae82f080cf87e84828f066c31723b781d68f5b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/715d82ba636cb3629a6e18a33bb9dbe53f9936ee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c8bcd45e9b10eef12321f08d2e5be33d615509c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a7b98aa10f895e2569403896f2d19b73b6c95653"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26591.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26591"},{"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":"f3a95075549e0e5c36db922caf86847db7a35403"},{"fixed":"a7b98aa10f895e2569403896f2d19b73b6c95653"},{"fixed":"6cc9c0af0aa06f781fa515a1734b1a4239dfd2c0"},{"fixed":"8c8bcd45e9b10eef12321f08d2e5be33d615509c"},{"fixed":"50ae82f080cf87e84828f066c31723b781d68f5b"},{"fixed":"715d82ba636cb3629a6e18a33bb9dbe53f9936ee"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26591.json"}}],"schema_version":"1.7.5"}