{"id":"CVE-2023-52992","summary":"bpf: Skip task with pid=1 in send_signal_common()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip task with pid=1 in send_signal_common()\n\nThe following kernel panic can be triggered when a task with pid=1 attaches\na prog that attempts to send killing signal to itself, also see [1] for more\ndetails:\n\n  Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b\n  CPU: 3 PID: 1 Comm: systemd Not tainted 6.1.0-09652-g59fe41b5255f #148\n  Call Trace:\n  \u003cTASK\u003e\n  __dump_stack lib/dump_stack.c:88 [inline]\n  dump_stack_lvl+0x100/0x178 lib/dump_stack.c:106\n  panic+0x2c4/0x60f kernel/panic.c:275\n  do_exit.cold+0x63/0xe4 kernel/exit.c:789\n  do_group_exit+0xd4/0x2a0 kernel/exit.c:950\n  get_signal+0x2460/0x2600 kernel/signal.c:2858\n  arch_do_signal_or_restart+0x78/0x5d0 arch/x86/kernel/signal.c:306\n  exit_to_user_mode_loop kernel/entry/common.c:168 [inline]\n  exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203\n  __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]\n  syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296\n  do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nSo skip task with pid=1 in bpf_send_signal_common() to avoid the panic.\n\n  [1] https://lore.kernel.org/bpf/20221222043507.33037-1-sunhao.th@gmail.com","modified":"2026-04-02T09:43:31.948647Z","published":"2025-03-27T16:43:27.618Z","related":["SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1195-1","SUSE-SU-2025:1241-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52992.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0dfef503133565fa0bcf3268d8eeb5b181191a65"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1283a01b6e19d05f7ed49584ea653947245cd41e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4923160393b06a34759a11b17930d71e06f396f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1c0263f1eb4deee132e11e52ee6982435460d81"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a3d81bc1eaef48e34dd0b9b48eefed9e02a06451"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52992.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52992"},{"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":"8b401f9ed2441ad9e219953927a842d24ed051fc"},{"fixed":"4923160393b06a34759a11b17930d71e06f396f2"},{"fixed":"a1c0263f1eb4deee132e11e52ee6982435460d81"},{"fixed":"0dfef503133565fa0bcf3268d8eeb5b181191a65"},{"fixed":"1283a01b6e19d05f7ed49584ea653947245cd41e"},{"fixed":"a3d81bc1eaef48e34dd0b9b48eefed9e02a06451"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52992.json"}}],"schema_version":"1.7.5"}