{"id":"CVE-2022-50654","aliases":["DEBIAN-CVE-2022-50654","EUVD-2022-55702","GHSA-6vvj-xcv2-hwp4","UBUNTU-CVE-2022-50654"],"status":"published","title":"bpf: Fix panic due to wrong pageattr of im-\u003eimage","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix panic due to wrong pageattr of im-\u003eimage\n\nIn the scenario where livepatch and kretfunc coexist, the pageattr of\nim-\u003eimage is rox after arch_prepare_bpf_trampoline in\nbpf_trampoline_update, and then modify_fentry or register_fentry returns\n-EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag\nwill be configured, and arch_prepare_bpf_trampoline will be re-executed.\n\nAt this time, because the pageattr of im-\u003eimage is rox,\narch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes\na fault. as follows:\n\n  insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c\n  bpftrace -e 'kretfunc:cmdline_proc_show {}'\n\nBUG: unable to handle page fault for address: ffffffffa0206000\nPGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061\nOops: 0003 [#1] PREEMPT SMP PTI\nCPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5\nRIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0\nRSP: 0018:ffffc90001083ad8 EFLAGS: 00010202\nRAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000\nRDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030\nRBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400\nR10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8\nR13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10\nFS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\n bpf_trampoline_update+0x25a/0x6b0\n __bpf_trampoline_link_prog+0x101/0x240\n bpf_trampoline_link_prog+0x2d/0x50\n bpf_tracing_prog_attach+0x24c/0x530\n bpf_raw_tp_link_attach+0x73/0x1d0\n __sys_bpf+0x100e/0x2570\n __x64_sys_bpf+0x1c/0x30\n do_syscall_64+0x5b/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nWith this patch, when modify_fentry or register_fentry returns -EAGAIN\nfrom bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset\nto nx+rw.","epss":{"day":"2026-11-10","score":0.00211,"percentile":0.11477,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2025-12-09T00:00:28Z","modified":"2026-11-10T12:10:00Z","fixes":[{"ecosystem":"Linux","package":"Kernel","fixed_in":["6.0.19","6.1.5"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"linux","fixed_in":["6.1.7-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["6.1.7-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["6.1.7-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Linux","package":"Kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.1.0"},{"fixed":"6.1.5"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"linux-hwe-edge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-28.30~16.04.1","4.8.0-30.32~16.04.1","4.8.0-32.34~16.04.1","4.8.0-34.36~16.04.1","4.10.0-14.16~16.04.1","4.10.0-19.21~16.04.1","4.10.0-20.22~16.04.1","4.10.0-21.23~16.04.1","4.10.0-22.24~16.04.1","4.10.0-24.28~16.04.1","4.10.0-26.30~16.04.1","4.11.0-13.19~16.04.1","4.11.0-14.20~16.04.1","4.13.0-16.19~16.04.3","4.13.0-17.20~16.04.1","4.13.0-19.22~16.04.1","4.13.0-21.24~16.04.1","4.13.0-25.29~16.04.2","4.15.0-13.14~16.04.1","4.15.0-15.16~16.04.1","4.15.0-20.21~16.04.1","4.15.0-22.24~16.04.1","4.15.0-23.25~16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-aws-5.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.0-1021.24~18.04.1","5.0.0-1022.25~18.04.1","5.0.0-1023.26~18.04.1","5.0.0-1024.27~18.04.1","5.0.0-1025.28","5.0.0-1027.30"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-aws-5.3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-1016.17~18.04.1","5.3.0-1017.18~18.04.1","5.3.0-1019.21~18.04.1","5.3.0-1023.25~18.04.1","5.3.0-1028.30~18.04.1","5.3.0-1030.32~18.04.1","5.3.0-1032.34~18.04.2","5.3.0-1033.35","5.3.0-1034.36","5.3.0-1035.37"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-azure","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.15.0-1002.2","4.15.0-1003.3","4.15.0-1004.4","4.15.0-1008.8","4.15.0-1009.9","4.15.0-1012.12","4.15.0-1013.13","4.15.0-1014.14","4.15.0-1018.18","4.15.0-1019.19","4.15.0-1021.21","4.15.0-1022.23","4.15.0-1023.24","4.15.0-1025.26","4.15.0-1028.29","4.15.0-1030.31","4.15.0-1031.32","4.15.0-1032.33","4.15.0-1035.36","4.15.0-1036.38","4.15.0-1037.39","4.18.0-1011.11~18.04.1","4.18.0-1013.13~18.04.1","4.18.0-1014.14~18.04.1","4.18.0-1018.18~18.04.1","4.18.0-1019.19~18.04.1","4.18.0-1020.20~18.04.1","4.18.0-1023.24~18.04.1","4.18.0-1024.25~18.04.1","4.18.0-1025.27~18.04.1","5.0.0-1014.14~18.04.1","5.0.0-1016.17~18.04.1","5.0.0-1018.19~18.04.1","5.0.0-1020.21~18.04.1","5.0.0-1022.23~18.04.1","5.0.0-1023.24~18.04.1","5.0.0-1025.27~18.04.1","5.0.0-1027.29~18.04.1","5.0.0-1028.30~18.04.1","5.0.0-1029.31~18.04.1","5.0.0-1031.33","5.0.0-1032.34","5.0.0-1035.37","5.0.0-1036.38"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-azure-5.3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-1007.8~18.04.1","5.3.0-1008.9~18.04.1","5.3.0-1009.10~18.04.1","5.3.0-1010.11~18.04.1","5.3.0-1012.13~18.04.1","5.3.0-1013.14~18.04.1","5.3.0-1016.17~18.04.1","5.3.0-1018.19~18.04.1","5.3.0-1019.20~18.04.1","5.3.0-1020.21~18.04.1","5.3.0-1022.23~18.04.1","5.3.0-1028.29~18.04.1","5.3.0-1031.32~18.04.1","5.3.0-1032.33~18.04.1","5.3.0-1034.35~18.04.1","5.3.0-1035.36"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-azure-edge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.18.0-1006.6~18.04.1","4.18.0-1007.7~18.04.1","4.18.0-1008.8~18.04.1","5.0.0-1012.12~18.04.2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-gcp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.15.0-1001.1","4.15.0-1003.3","4.15.0-1005.5","4.15.0-1006.6","4.15.0-1008.8","4.15.0-1009.9","4.15.0-1010.10","4.15.0-1014.14","4.15.0-1015.15","4.15.0-1017.18","4.15.0-1018.19","4.15.0-1019.20","4.15.0-1021.22","4.15.0-1023.24","4.15.0-1024.25","4.15.0-1025.26","4.15.0-1026.27","4.15.0-1027.28","4.15.0-1028.29","4.15.0-1029.31","4.15.0-1030.32","4.15.0-1032.34","4.15.0-1033.35","4.15.0-1034.36","4.15.0-1036.38","4.15.0-1037.39","4.15.0-1040.42","4.15.0-1042.45","4.15.0-1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Fix panic due to wrong pageattr of im-\u003eimage","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix panic due to wrong pageattr of im-\u003eimage\n\nIn the scenario where livepatch and kretfunc coexist, the pageattr of\nim-\u003eimage is rox after arch_prepare_bpf_trampoline in\nbpf_trampoline_update, and then modify_fentry or register_fentry returns\n-EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag\nwill be configured, and arch_prepare_bpf_trampoline will be re-executed.\n\nAt this time, because the pageattr of im-\u003eimage is rox,\narch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes\na fault. as follows:\n\n  insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c\n  bpftrace -e 'kretfunc:cmdline_proc_show {}'\n\nBUG: unable to handle page fault for address: ffffffffa0206000\nPGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061\nOops: 0003 [#1] PREEMPT SMP PTI\nCPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5\nRIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0\nRSP: 0018:ffffc90001083ad8 EFLAGS: 00010202\nRAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000\nRDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030\nRBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400\nR10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8\nR13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10\nFS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\n bpf_trampoline_update+0x25a/0x6b0\n __bpf_trampoline_link_prog+0x101/0x240\n bpf_trampoline_link_prog+0x2d/0x50\n bpf_tracing_prog_attach+0x24c/0x530\n bpf_raw_tp_link_attach+0x73/0x1d0\n __sys_bpf+0x100e/0x2570\n __x64_sys_bpf+0x1c/0x30\n do_syscall_64+0x5b/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nWith this patch, when modify_fentry or register_fentry returns -EAGAIN\nfrom bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset\nto nx+rw.","status":"published","published":"2025-12-09T00:00:28.878Z","modified":"2026-05-11T19:23:01.672Z","updated_at":"2026-11-02T14:34:40.621895Z"}],"euvd":[{"id":"EUVD-2022-55702","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix panic due to wrong pageattr of im-\u003eimage\n\nIn the scenario where livepatch and kretfunc coexist, the pageattr of\nim-\u003eimage is rox after arch_prepare_bpf_trampoline in\nbpf_trampoline_update, and then modify_fentry or register_fentry returns\n-EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag\nwill be configured, and arch_prepare_bpf_trampoline will be re-executed.\n\nAt this time, because the pageattr of im-\u003eimage is rox,\narch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes\na fault. as follows:\n\n  insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c\n  bpftrace -e 'kretfunc:cmdline_proc_show {}'\n\nBUG: unable to handle page fault for address: ffffffffa0206000\nPGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061\nOops: 0003 [#1] PREEMPT SMP PTI\nCPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5\nRIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0\nRSP: 0018:ffffc90001083ad8 EFLAGS: 00010202\nRAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000\nRDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030\nRBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400\nR10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8\nR13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10\nFS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\n bpf_trampoline_update+0x25a/0x6b0\n __bpf_trampoline_link_prog+0x101/0x240\n bpf_trampoline_link_prog+0x2d/0x50\n bpf_tracing_prog_attach+0x24c/0x530\n bpf_raw_tp_link_attach+0x73/0x1d0\n __sys_bpf+0x100e/0x2570\n __x64_sys_bpf+0x1c/0x30\n do_syscall_64+0x5b/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nWith this patch, when modify_fentry or register_fentry returns -EAGAIN\nfrom bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset\nto nx+rw.","status":"published","published":"2025-12-09T00:00:28Z","modified":"2026-05-11T19:23:01Z","updated_at":"2026-11-02T19:05:03.870837Z"}],"ghsa":[{"id":"GHSA-6vvj-xcv2-hwp4","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix panic due to wrong...","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix panic due to wrong pageattr of im-\u003eimage\n\nIn the scenario where livepatch and kretfunc coexist, the pageattr of\nim-\u003eimage is rox after arch_prepare_bpf_trampoline in\nbpf_trampoline_update, and then modify_fentry or register_fentry returns\n-EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag\nwill be configured, and arch_prepare_bpf_trampoline will be re-executed.\n\nAt this time, because the pageattr of im-\u003eimage is rox,\narch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes\na fault. as follows:\n\n  insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c\n  bpftrace -e 'kretfunc:cmdline_proc_show {}'\n\nBUG: unable to handle page fault for address: ffffffffa0206000\nPGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061\nOops: 0003 [#1] PREEMPT SMP PTI\nCPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5\nRIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0\nRSP: 0018:ffffc90001083ad8 EFLAGS: 00010202\nRAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000\nRDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030\nRBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400\nR10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8\nR13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10\nFS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\n bpf_trampoline_update+0x25a/0x6b0\n __bpf_trampoline_link_prog+0x101/0x240\n bpf_trampoline_link_prog+0x2d/0x50\n bpf_tracing_prog_attach+0x24c/0x530\n bpf_raw_tp_link_attach+0x73/0x1d0\n __sys_bpf+0x100e/0x2570\n __x64_sys_bpf+0x1c/0x30\n do_syscall_64+0x5b/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nWith this patch, when modify_fentry or register_fentry returns -EAGAIN\nfrom bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset\nto nx+rw.","status":"published","published":"2025-12-09T03:31:10Z","modified":"2025-12-09T03:31:18Z","updated_at":"2026-11-02T15:05:05.976411Z"}],"nvd":[{"id":"CVE-2022-50654","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix panic due to wrong pageattr of im-\u003eimage\n\nIn the scenario where livepatch and kretfunc coexist, the pageattr of\nim-\u003eimage is rox after arch_prepare_bpf_trampoline in\nbpf_trampoline_update, and then modify_fentry or register_fentry returns\n-EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag\nwill be configured, and arch_prepare_bpf_trampoline will be re-executed.\n\nAt this time, because the pageattr of im-\u003eimage is rox,\narch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes\na fault. as follows:\n\n  insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c\n  bpftrace -e 'kretfunc:cmdline_proc_show {}'\n\nBUG: unable to handle page fault for address: ffffffffa0206000\nPGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061\nOops: 0003 [#1] PREEMPT SMP PTI\nCPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5\nRIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0\nRSP: 0018:ffffc90001083ad8 EFLAGS: 00010202\nRAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000\nRDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030\nRBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400\nR10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8\nR13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10\nFS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\n bpf_trampoline_update+0x25a/0x6b0\n __bpf_trampoline_link_prog+0x101/0x240\n bpf_trampoline_link_prog+0x2d/0x50\n bpf_tracing_prog_attach+0x24c/0x530\n bpf_raw_tp_link_attach+0x73/0x1d0\n __sys_bpf+0x100e/0x2570\n __x64_sys_bpf+0x1c/0x30\n do_syscall_64+0x5b/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nWith this patch, when modify_fentry or register_fentry returns -EAGAIN\nfrom bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset\nto nx+rw.","status":"published","published":"2025-12-09T01:16:48.34Z","modified":"2026-11-10T12:10:00.177Z","updated_at":"2026-11-10T14:19:25.014555Z"}],"osv":[{"id":"CVE-2022-50654","title":"bpf: Fix panic due to wrong pageattr of im-\u003eimage","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix panic due to wrong pageattr of im-\u003eimage\n\nIn the scenario where livepatch and kretfunc coexist, the pageattr of\nim-\u003eimage is rox after arch_prepare_bpf_trampoline in\nbpf_trampoline_update, and then modify_fentry or register_fentry returns\n-EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag\nwill be configured, and arch_prepare_bpf_trampoline will be re-executed.\n\nAt this time, because the pageattr of im-\u003eimage is rox,\narch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes\na fault. as follows:\n\n  insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c\n  bpftrace -e 'kretfunc:cmdline_proc_show {}'\n\nBUG: unable to handle page fault for address: ffffffffa0206000\nPGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061\nOops: 0003 [#1] PREEMPT SMP PTI\nCPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5\nRIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0\nRSP: 0018:ffffc90001083ad8 EFLAGS: 00010202\nRAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000\nRDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030\nRBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400\nR10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8\nR13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10\nFS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n\u003cTASK\u003e\n bpf_trampoline_update+0x25a/0x6b0\n __bpf_trampoline_link_prog+0x101/0x240\n bpf_trampoline_link_prog+0x2d/0x50\n bpf_tracing_prog_attach+0x24c/0x530\n bpf_raw_tp_link_attach+0x73/0x1d0\n __sys_bpf+0x100e/0x2570\n __x64_sys_bpf+0x1c/0x30\n do_syscall_64+0x5b/0x80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nWith this patch, when modify_fentry or register_fentry returns -EAGAIN\nfrom bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset\nto nx+rw.","status":"published","published":"2025-12-09T00:00:28.878Z","modified":"2026-10-28T02:31:12.130249976Z","updated_at":"2026-11-02T15:44:29.084154Z"},{"id":"DEBIAN-CVE-2022-50654","description":"In the Linux kernel, the following vulnerability has been resolved:  bpf: Fix panic due to wrong pageattr of im-\u003eimage  In the scenario where livepatch and kretfunc coexist, the pageattr of im-\u003eimage is rox after arch_prepare_bpf_trampoline in bpf_trampoline_update, and then modify_fentry or register_fentry returns -EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag will be configured, and arch_prepare_bpf_trampoline will be re-executed.  At this time, because the pageattr of im-\u003eimage is rox, arch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes a fault. as follows:    insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c   bpftrace -e 'kretfunc:cmdline_proc_show {}'  BUG: unable to handle page fault for address: ffffffffa0206000 PGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061 Oops: 0003 [#1] PREEMPT SMP PTI CPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5 RIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0 RSP: 0018:ffffc90001083ad8 EFLAGS: 00010202 RAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000 RDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030 RBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400 R10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8 R13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10 FS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: \u003cTASK\u003e  bpf_trampoline_update+0x25a/0x6b0  __bpf_trampoline_link_prog+0x101/0x240  bpf_trampoline_link_prog+0x2d/0x50  bpf_tracing_prog_attach+0x24c/0x530  bpf_raw_tp_link_attach+0x73/0x1d0  __sys_bpf+0x100e/0x2570  __x64_sys_bpf+0x1c/0x30  do_syscall_64+0x5b/0x80  entry_SYSCALL_64_after_hwframe+0x63/0xcd  With this patch, when modify_fentry or register_fentry returns -EAGAIN from bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset to nx+rw.","status":"published","published":"2025-12-09T01:16:48.34Z","modified":"2026-11-03T07:47:34.454213096Z","updated_at":"2026-11-03T08:25:21.819847Z"},{"id":"UBUNTU-CVE-2022-50654","description":"In the Linux kernel, the following vulnerability has been resolved: bpf: Fix panic due to wrong pageattr of im-\u003eimage In the scenario where livepatch and kretfunc coexist, the pageattr of im-\u003eimage is rox after arch_prepare_bpf_trampoline in bpf_trampoline_update, and then modify_fentry or register_fentry returns -EAGAIN from bpf_tramp_ftrace_ops_func, the BPF_TRAMP_F_ORIG_STACK flag will be configured, and arch_prepare_bpf_trampoline will be re-executed. At this time, because the pageattr of im-\u003eimage is rox, arch_prepare_bpf_trampoline will read and write im-\u003eimage, which causes a fault. as follows:   insmod livepatch-sample.ko    # samples/livepatch/livepatch-sample.c   bpftrace -e 'kretfunc:cmdline_proc_show {}' BUG: unable to handle page fault for address: ffffffffa0206000 PGD 322d067 P4D 322d067 PUD 322e063 PMD 1297e067 PTE d428061 Oops: 0003 [#1] PREEMPT SMP PTI CPU: 2 PID: 270 Comm: bpftrace Tainted: G            E K    6.1.0 #5 RIP: 0010:arch_prepare_bpf_trampoline+0xed/0x8c0 RSP: 0018:ffffc90001083ad8 EFLAGS: 00010202 RAX: ffffffffa0206000 RBX: 0000000000000020 RCX: 0000000000000000 RDX: ffffffffa0206001 RSI: ffffffffa0206000 RDI: 0000000000000030 RBP: ffffc90001083b70 R08: 0000000000000066 R09: ffff88800f51b400 R10: 000000002e72c6e5 R11: 00000000d0a15080 R12: ffff8880110a68c8 R13: 0000000000000000 R14: ffff88800f51b400 R15: ffffffff814fec10 FS:  00007f87bc0dc780(0000) GS:ffff88803e600000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa0206000 CR3: 0000000010b70000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: \u003cTASK\u003e  bpf_trampoline_update+0x25a/0x6b0  __bpf_trampoline_link_prog+0x101/0x240  bpf_trampoline_link_prog+0x2d/0x50  bpf_tracing_prog_attach+0x24c/0x530  bpf_raw_tp_link_attach+0x73/0x1d0  __sys_bpf+0x100e/0x2570  __x64_sys_bpf+0x1c/0x30  do_syscall_64+0x5b/0x80  entry_SYSCALL_64_after_hwframe+0x63/0xcd With this patch, when modify_fentry or register_fentry returns -EAGAIN from bpf_tramp_ftrace_ops_func, the pageattr of im-\u003eimage will be reset to nx+rw.","status":"published","published":"2025-12-09T01:16:00Z","modified":"2026-01-27T12:35:03.345592Z","updated_at":"2026-11-02T16:54:14.479882Z"}]}}