{"id":"CVE-2023-52992","title":"bpf: Skip task with pid=1 in send_signal_common()","summary":"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 sign…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < 4923160393b06a34759a11b17930d71e06f396f2","Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < a1c0263f1eb4deee132e11e52ee6982435460d81","Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < 0dfef503133565fa0bcf3268d8eeb5b181191a65","Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < 1283a01b6e19d05f7ed49584ea653947245cd41e","Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < a3d81bc1eaef48e34dd0b9b48eefed9e02a06451","Linux 5.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:14:12.333226Z"},"published":"2025-03-27","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:20:53.626Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-52992","references":[{"url":"https://git.kernel.org/stable/c/4923160393b06a34759a11b17930d71e06f396f2"},{"url":"https://git.kernel.org/stable/c/a1c0263f1eb4deee132e11e52ee6982435460d81"},{"url":"https://git.kernel.org/stable/c/0dfef503133565fa0bcf3268d8eeb5b181191a65"},{"url":"https://git.kernel.org/stable/c/1283a01b6e19d05f7ed49584ea653947245cd41e"},{"url":"https://git.kernel.org/stable/c/a3d81bc1eaef48e34dd0b9b48eefed9e02a06451"}],"tags":["cve.org"],"epss":0.00268,"epssPercentile":0.19097,"ingestedAt":"2026-11-05T22:38:31.752Z","slug":"CVE-2023-52992","body":"## Overview\n\nIn 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  <TASK>\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\n\n## Affected\n\n- `Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < 4923160393b06a34759a11b17930d71e06f396f2`\n- `Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < a1c0263f1eb4deee132e11e52ee6982435460d81`\n- `Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < 0dfef503133565fa0bcf3268d8eeb5b181191a65`\n- `Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < 1283a01b6e19d05f7ed49584ea653947245cd41e`\n- `Linux >= 8b401f9ed2441ad9e219953927a842d24ed051fc < a3d81bc1eaef48e34dd0b9b48eefed9e02a06451`\n- `Linux 5.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}