{ "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\nbpf, arm64: Clear prog->jited_len along prog->jited\n\nsyzbot reported an illegal copy_to_user() attempt\nfrom bpf_prog_get_info_by_fd() [1]\n\nThere was no repro yet on this bug, but I think\nthat commit 0aef499f3172 (\"mm/usercopy: Detect vmalloc overruns\")\nis exposing a prior bug in bpf arm64.\n\nbpf_prog_get_info_by_fd() looks at prog->jited_len\nto determine if the JIT image can be copied out to user space.\n\nMy theory is that syzbot managed to get a prog where prog->jited_len\nhas been set to 43, while prog->bpf_func has ben cleared.\n\nIt is not clear why copy_to_user(uinsns, NULL, ulen) is triggering\nthis particular warning.\n\nI thought find_vma_area(NULL) would not find a vm_struct.\nAs we do not hold vmap_area_lock spinlock, it might be possible\nthat the found vm_struct was garbage.\n\n[1]\nusercopy: Kernel memory exposure attempt detected from vmalloc (offset 792633534417210172, size 43)!\nkernel BUG at mm/usercopy.c:101!\nInternal error: Oops - BUG: 0 [#1] PREEMPT SMP\nModules linked in:\nCPU: 0 PID: 25002 Comm: syz-executor.1 Not tainted 5.18.0-syzkaller-10139-g8291eaafed36 #0\nHardware name: linux,dummy-virt (DT)\npstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : usercopy_abort+0x90/0x94 mm/usercopy.c:101\nlr : usercopy_abort+0x90/0x94 mm/usercopy.c:89\nsp : ffff80000b773a20\nx29: ffff80000b773a30 x28: faff80000b745000 x27: ffff80000b773b48\nx26: 0000000000000000 x25: 000000000000002b x24: 0000000000000000\nx23: 00000000000000e0 x22: ffff80000b75db67 x21: 0000000000000001\nx20: 000000000000002b x19: ffff80000b75db3c x18: 00000000fffffffd\nx17: 2820636f6c6c616d x16: 76206d6f72662064 x15: 6574636574656420\nx14: 74706d6574746120 x13: 2129333420657a69 x12: 73202c3237313031\nx11: 3237313434333533 x10: 3336323937207465 x9 : 657275736f707865\nx8 : ffff80000a30c550 x7 : ffff80000b773830 x6 : ffff80000b773830\nx5 : 0000000000000000 x4 : ffff00007fbbaa10 x3 : 0000000000000000\nx2 : 0000000000000000 x1 : f7ff000028fc0000 x0 : 0000000000000064\nCall trace:\n usercopy_abort+0x90/0x94 mm/usercopy.c:89\n check_heap_object mm/usercopy.c:186 [inline]\n __check_object_size mm/usercopy.c:252 [inline]\n __check_object_size+0x198/0x36c mm/usercopy.c:214\n check_object_size include/linux/thread_info.h:199 [inline]\n check_copy_size include/linux/thread_info.h:235 [inline]\n copy_to_user include/linux/uaccess.h:159 [inline]\n bpf_prog_get_info_by_fd.isra.0+0xf14/0xfdc kernel/bpf/syscall.c:3993\n bpf_obj_get_info_by_fd+0x12c/0x510 kernel/bpf/syscall.c:4253\n __sys_bpf+0x900/0x2150 kernel/bpf/syscall.c:4956\n __do_sys_bpf kernel/bpf/syscall.c:5021 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:5019 [inline]\n __arm64_sys_bpf+0x28/0x40 kernel/bpf/syscall.c:5019\n __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]\n invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52\n el0_svc_common.constprop.0+0x44/0xec arch/arm64/kernel/syscall.c:142\n do_el0_svc+0xa0/0xc0 arch/arm64/kernel/syscall.c:206\n el0_svc+0x44/0xb0 arch/arm64/kernel/entry-common.c:624\n el0t_64_sync_handler+0x1ac/0x1b0 arch/arm64/kernel/entry-common.c:642\n el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:581\nCode: aa0003e3 d00038c0 91248000 97fff65f (d4210000)", "category":"general", "title":"Synopsis" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49341" }, { "summary":"CVE-2022-49341 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2022/csaf-openeuler-cve-2022-49341.json" }, { "summary":"openEuler-SA-2025-1282", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1282" }, { "summary":"CVE-2022-49341", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2022-49341&packageName=kernel" } ], "title":"openEuler cve CVE-2022-49341", "tracking":{ "initial_release_date":"2025-03-14T23:37:29+08:00", "revision_history":[ { "date":"2025-03-14T23:37:29+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2025-03-14T23:37:29+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2025-03-14T23:37:29+08:00", "id":"CVE-2022-49341", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ 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reported an illegal copy_to_user() attempt\nfrom bpf_prog_get_info_by_fd() [1]\n\nThere was no repro yet on this bug, but I think\nthat commit 0aef499f3172 (\"mm/usercopy: Detect vmalloc overruns\")\nis exposing a prior bug in bpf arm64.\n\nbpf_prog_get_info_by_fd() looks at prog->jited_len\nto determine if the JIT image can be copied out to user space.\n\nMy theory is that syzbot managed to get a prog where prog->jited_len\nhas been set to 43, while prog->bpf_func has ben cleared.\n\nIt is not clear why copy_to_user(uinsns, NULL, ulen) is triggering\nthis particular warning.\n\nI thought find_vma_area(NULL) would not find a vm_struct.\nAs we do not hold vmap_area_lock spinlock, it might be possible\nthat the found vm_struct was garbage.\n\n[1]\nusercopy: Kernel memory exposure attempt detected from vmalloc (offset 792633534417210172, size 43)!\nkernel BUG at mm/usercopy.c:101!\nInternal error: Oops - BUG: 0 [#1] PREEMPT SMP\nModules linked in:\nCPU: 0 PID: 25002 Comm: syz-executor.1 Not tainted 5.18.0-syzkaller-10139-g8291eaafed36 #0\nHardware name: linux,dummy-virt (DT)\npstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : usercopy_abort+0x90/0x94 mm/usercopy.c:101\nlr : usercopy_abort+0x90/0x94 mm/usercopy.c:89\nsp : ffff80000b773a20\nx29: ffff80000b773a30 x28: faff80000b745000 x27: ffff80000b773b48\nx26: 0000000000000000 x25: 000000000000002b x24: 0000000000000000\nx23: 00000000000000e0 x22: ffff80000b75db67 x21: 0000000000000001\nx20: 000000000000002b x19: ffff80000b75db3c x18: 00000000fffffffd\nx17: 2820636f6c6c616d x16: 76206d6f72662064 x15: 6574636574656420\nx14: 74706d6574746120 x13: 2129333420657a69 x12: 73202c3237313031\nx11: 3237313434333533 x10: 3336323937207465 x9 : 657275736f707865\nx8 : ffff80000a30c550 x7 : ffff80000b773830 x6 : ffff80000b773830\nx5 : 0000000000000000 x4 : ffff00007fbbaa10 x3 : 0000000000000000\nx2 : 0000000000000000 x1 : f7ff000028fc0000 x0 : 0000000000000064\nCall trace:\n usercopy_abort+0x90/0x94 mm/usercopy.c:89\n check_heap_object mm/usercopy.c:186 [inline]\n __check_object_size mm/usercopy.c:252 [inline]\n __check_object_size+0x198/0x36c mm/usercopy.c:214\n check_object_size include/linux/thread_info.h:199 [inline]\n check_copy_size include/linux/thread_info.h:235 [inline]\n copy_to_user include/linux/uaccess.h:159 [inline]\n bpf_prog_get_info_by_fd.isra.0+0xf14/0xfdc kernel/bpf/syscall.c:3993\n bpf_obj_get_info_by_fd+0x12c/0x510 kernel/bpf/syscall.c:4253\n __sys_bpf+0x900/0x2150 kernel/bpf/syscall.c:4956\n __do_sys_bpf kernel/bpf/syscall.c:5021 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:5019 [inline]\n __arm64_sys_bpf+0x28/0x40 kernel/bpf/syscall.c:5019\n __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]\n invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52\n el0_svc_common.constprop.0+0x44/0xec arch/arm64/kernel/syscall.c:142\n do_el0_svc+0xa0/0xc0 arch/arm64/kernel/syscall.c:206\n el0_svc+0x44/0xb0 arch/arm64/kernel/entry-common.c:624\n el0t_64_sync_handler+0x1ac/0x1b0 arch/arm64/kernel/entry-common.c:642\n el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:581\nCode: aa0003e3 d00038c0 91248000 97fff65f (d4210000)", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-20.03-LTS-SP4:bpftool-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:bpftool-debuginfo-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debuginfo-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debugsource-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-devel-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-source-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", 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"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1282" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.5, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":[ "openEuler-20.03-LTS-SP4:bpftool-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:bpftool-debuginfo-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debuginfo-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-debugsource-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-devel-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-source-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", "openEuler-20.03-LTS-SP4:kernel-tools-debuginfo-4.19.90-2503.3.0.0319.oe2003sp4.aarch64", 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"details":"Medium", "category":"impact" } ], "title":"CVE-2022-49341" } ] }