{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kprobes: Fix null pointer reference in arch_prepare_kprobe()\n\nI found a null pointer reference in arch_prepare_kprobe():\n\n # echo 'p cmdline_proc_show' > kprobe_events\n # echo 'p cmdline_proc_show+16' >> kprobe_events\n Kernel attempted to read user page (0) - exploit attempt? (uid: 0)\n BUG: Kernel NULL pointer dereference on read at 0x00000000\n Faulting instruction address: 0xc000000000050bfc\n Oops: Kernel access of bad area, sig: 11 [#1]\n LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV\n Modules linked in:\n CPU: 0 PID: 122 Comm: sh Not tainted 6.0.0-rc3-00007-gdcf8e5633e2e #10\n NIP: c000000000050bfc LR: c000000000050bec CTR: 0000000000005bdc\n REGS: c0000000348475b0 TRAP: 0300 Not tainted (6.0.0-rc3-00007-gdcf8e5633e2e)\n MSR: 9000000000009033 CR: 88002444 XER: 20040006\n CFAR: c00000000022d100 DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0\n ...\n NIP arch_prepare_kprobe+0x10c/0x2d0\n LR arch_prepare_kprobe+0xfc/0x2d0\n Call Trace:\n 0xc0000000012f77a0 (unreliable)\n register_kprobe+0x3c0/0x7a0\n __register_trace_kprobe+0x140/0x1a0\n __trace_kprobe_create+0x794/0x1040\n trace_probe_create+0xc4/0xe0\n create_or_delete_trace_kprobe+0x2c/0x80\n trace_parse_run_command+0xf0/0x210\n probes_write+0x20/0x40\n vfs_write+0xfc/0x450\n ksys_write+0x84/0x140\n system_call_exception+0x17c/0x3a0\n system_call_vectored_common+0xe8/0x278\n --- interrupt: 3000 at 0x7fffa5682de0\n NIP: 00007fffa5682de0 LR: 0000000000000000 CTR: 0000000000000000\n REGS: c000000034847e80 TRAP: 3000 Not tainted (6.0.0-rc3-00007-gdcf8e5633e2e)\n MSR: 900000000280f033 CR: 44002408 XER: 00000000\n\nThe address being probed has some special:\n\n cmdline_proc_show: Probe based on ftrace\n cmdline_proc_show+16: Probe for the next instruction at the ftrace location\n\nThe ftrace-based kprobe does not generate kprobe::ainsn::insn, it gets\nset to NULL. In arch_prepare_kprobe() it will check for:\n\n ...\n prev = get_kprobe(p->addr - 1);\n preempt_enable_no_resched();\n if (prev && ppc_inst_prefixed(ppc_inst_read(prev->ainsn.insn))) {\n ...\n\nIf prev is based on ftrace, 'ppc_inst_read(prev->ainsn.insn)' will occur\nwith a null pointer reference. At this point prev->addr will not be a\nprefixed instruction, so the check can be skipped.\n\nCheck if prev is ftrace-based kprobe before reading 'prev->ainsn.insn'\nto fix this problem.\n\n[mpe: Trim oops]", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50635" }, { "summary":"CVE-2022-50635 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2022/csaf-openeuler-cve-2022-50635.json" }, { "summary":"openEuler-SA-2026-1075", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1075" }, { "summary":"CVE-2022-50635", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2022-50635&packageName=kernel" } ], "title":"openEuler cve CVE-2022-50635", "tracking":{ "initial_release_date":"2026-01-22T11:01:09+08:00", "revision_history":[ { "date":"2026-01-22T11:01:09+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-01-22T11:01:09+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-01-22T11:01:09+08:00", "id":"CVE-2022-50635", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP3" }, "product_id":"openEuler-22.03-LTS-SP3", "name":"openEuler-22.03-LTS-SP3" }, "name":"openEuler-22.03-LTS-SP3", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP3" }, "product_id":"kernel-5.10.0-298.0.0.200.oe2203sp3.aarch64.rpm", "name":"kernel-5.10.0-298.0.0.200.oe2203sp3.aarch64.rpm" }, 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(uid: 0)\n BUG: Kernel NULL pointer dereference on read at 0x00000000\n Faulting instruction address: 0xc000000000050bfc\n Oops: Kernel access of bad area, sig: 11 [#1]\n LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV\n Modules linked in:\n CPU: 0 PID: 122 Comm: sh Not tainted 6.0.0-rc3-00007-gdcf8e5633e2e #10\n NIP: c000000000050bfc LR: c000000000050bec CTR: 0000000000005bdc\n REGS: c0000000348475b0 TRAP: 0300 Not tainted (6.0.0-rc3-00007-gdcf8e5633e2e)\n MSR: 9000000000009033 CR: 88002444 XER: 20040006\n CFAR: c00000000022d100 DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0\n ...\n NIP arch_prepare_kprobe+0x10c/0x2d0\n LR arch_prepare_kprobe+0xfc/0x2d0\n Call Trace:\n 0xc0000000012f77a0 (unreliable)\n register_kprobe+0x3c0/0x7a0\n __register_trace_kprobe+0x140/0x1a0\n __trace_kprobe_create+0x794/0x1040\n trace_probe_create+0xc4/0xe0\n create_or_delete_trace_kprobe+0x2c/0x80\n trace_parse_run_command+0xf0/0x210\n probes_write+0x20/0x40\n vfs_write+0xfc/0x450\n ksys_write+0x84/0x140\n system_call_exception+0x17c/0x3a0\n system_call_vectored_common+0xe8/0x278\n --- interrupt: 3000 at 0x7fffa5682de0\n NIP: 00007fffa5682de0 LR: 0000000000000000 CTR: 0000000000000000\n REGS: c000000034847e80 TRAP: 3000 Not tainted (6.0.0-rc3-00007-gdcf8e5633e2e)\n MSR: 900000000280f033 CR: 44002408 XER: 00000000\n\nThe address being probed has some special:\n\n cmdline_proc_show: Probe based on ftrace\n cmdline_proc_show+16: Probe for the next instruction at the ftrace location\n\nThe ftrace-based kprobe does not generate kprobe::ainsn::insn, it gets\nset to NULL. In arch_prepare_kprobe() it will check for:\n\n ...\n prev = get_kprobe(p->addr - 1);\n preempt_enable_no_resched();\n if (prev && ppc_inst_prefixed(ppc_inst_read(prev->ainsn.insn))) {\n ...\n\nIf prev is based on ftrace, 'ppc_inst_read(prev->ainsn.insn)' will occur\nwith a null pointer reference. At this point prev->addr will not be a\nprefixed instruction, so the check can be skipped.\n\nCheck if prev is ftrace-based kprobe before reading 'prev->ainsn.insn'\nto fix this problem.\n\n[mpe: Trim oops]", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP3:kernel-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debuginfo-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debugsource-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-devel-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-headers-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-source-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-tools-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-tools-debuginfo-5.10.0-298.0.0.200.oe2203sp3.aarch64", 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"openEuler-22.03-LTS-SP3:kernel-headers-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:kernel-source-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:kernel-tools-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:kernel-tools-debuginfo-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:kernel-tools-devel-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:perf-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:perf-debuginfo-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:python3-perf-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:python3-perf-debuginfo-5.10.0-298.0.0.200.oe2203sp3.x86_64" ], "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1075" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.0, "vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":[ "openEuler-22.03-LTS-SP3:kernel-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debuginfo-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-debugsource-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-devel-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-headers-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-source-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-tools-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-tools-debuginfo-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:kernel-tools-devel-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:perf-5.10.0-298.0.0.200.oe2203sp3.aarch64", "openEuler-22.03-LTS-SP3:perf-debuginfo-5.10.0-298.0.0.200.oe2203sp3.aarch64", 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"openEuler-22.03-LTS-SP3:perf-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:perf-debuginfo-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:python3-perf-5.10.0-298.0.0.200.oe2203sp3.x86_64", "openEuler-22.03-LTS-SP3:python3-perf-debuginfo-5.10.0-298.0.0.200.oe2203sp3.x86_64" ] } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2022-50635" } ] }