CVE-2022-50296 (GCVE-0-2022-50296)
Vulnerability from cvelistv5
Published
2025-09-15 14:45
Modified
2025-09-15 14:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: UM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected, cpu_max_bits_warn() generates a runtime warning similar as below while we show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit) instead of NR_CPUS to iterate CPUs. [ 3.052463] ------------[ cut here ]------------ [ 3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0 [ 3.070072] Modules linked in: efivarfs autofs4 [ 3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052 [ 3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000 [ 3.109127] 9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430 [ 3.118774] 90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff [ 3.128412] 0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890 [ 3.138056] 0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa [ 3.147711] ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000 [ 3.157364] 900000000101c998 0000000000000004 9000000000ef7430 0000000000000000 [ 3.167012] 0000000000000009 000000000000006c 0000000000000000 0000000000000000 [ 3.176641] 9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286 [ 3.186260] 00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c [ 3.195868] ... [ 3.199917] Call Trace: [ 3.203941] [<90000000002086d8>] show_stack+0x38/0x14c [ 3.210666] [<9000000000cf846c>] dump_stack_lvl+0x60/0x88 [ 3.217625] [<900000000023d268>] __warn+0xd0/0x100 [ 3.223958] [<9000000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc [ 3.231150] [<9000000000210220>] show_cpuinfo+0x5e8/0x5f0 [ 3.238080] [<90000000004f578c>] seq_read_iter+0x354/0x4b4 [ 3.245098] [<90000000004c2e90>] new_sync_read+0x17c/0x1c4 [ 3.252114] [<90000000004c5174>] vfs_read+0x138/0x1d0 [ 3.258694] [<90000000004c55f8>] ksys_read+0x70/0x100 [ 3.265265] [<9000000000cfde9c>] do_syscall+0x7c/0x94 [ 3.271820] [<9000000000202fe4>] handle_syscall+0xc4/0x160 [ 3.281824] ---[ end trace 8b484262b4b8c24c ]---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16c546e148fa6d14a019431436a6f7b4087dbccd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2e3863cc02c156b51b50592d43ffa6a13b680b0d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5177bdc38eaa1c1ca6302214ab06913540cd00a2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a73e6edcbf3cdd82796dcdf0c0f5fe5d91021af
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7efe61dc6aa45aab8a40e304fa2dae21e33b0db4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/844748412be03a236dcf4a208b588162a275e189
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd251d39b13485eb94ee65bb000d024e02c00e45
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbd964a733db015bbb9dff592c259c736398140f
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/um/kernel/um_arch.c"
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/um/kernel/um_arch.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "unaffected",
              "version": "4.9.331",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "4.14.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.262",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.220",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.75",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.331",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.296",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.262",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.220",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.10.150",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.75",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.3",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK\n\nWhen CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected,\ncpu_max_bits_warn() generates a runtime warning similar as below while\nwe show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit)\ninstead of NR_CPUS to iterate CPUs.\n\n[    3.052463] ------------[ cut here ]------------\n[    3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0\n[    3.070072] Modules linked in: efivarfs autofs4\n[    3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052\n[    3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000\n[    3.109127]         9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430\n[    3.118774]         90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff\n[    3.128412]         0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890\n[    3.138056]         0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa\n[    3.147711]         ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000\n[    3.157364]         900000000101c998 0000000000000004 9000000000ef7430 0000000000000000\n[    3.167012]         0000000000000009 000000000000006c 0000000000000000 0000000000000000\n[    3.176641]         9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286\n[    3.186260]         00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c\n[    3.195868]         ...\n[    3.199917] Call Trace:\n[    3.203941] [\u003c90000000002086d8\u003e] show_stack+0x38/0x14c\n[    3.210666] [\u003c9000000000cf846c\u003e] dump_stack_lvl+0x60/0x88\n[    3.217625] [\u003c900000000023d268\u003e] __warn+0xd0/0x100\n[    3.223958] [\u003c9000000000cf3c90\u003e] warn_slowpath_fmt+0x7c/0xcc\n[    3.231150] [\u003c9000000000210220\u003e] show_cpuinfo+0x5e8/0x5f0\n[    3.238080] [\u003c90000000004f578c\u003e] seq_read_iter+0x354/0x4b4\n[    3.245098] [\u003c90000000004c2e90\u003e] new_sync_read+0x17c/0x1c4\n[    3.252114] [\u003c90000000004c5174\u003e] vfs_read+0x138/0x1d0\n[    3.258694] [\u003c90000000004c55f8\u003e] ksys_read+0x70/0x100\n[    3.265265] [\u003c9000000000cfde9c\u003e] do_syscall+0x7c/0x94\n[    3.271820] [\u003c9000000000202fe4\u003e] handle_syscall+0xc4/0x160\n[    3.281824] ---[ end trace 8b484262b4b8c24c ]---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:45:52.121Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571"
        },
        {
          "url": "https://git.kernel.org/stable/c/dbd964a733db015bbb9dff592c259c736398140f"
        },
        {
          "url": "https://git.kernel.org/stable/c/844748412be03a236dcf4a208b588162a275e189"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd251d39b13485eb94ee65bb000d024e02c00e45"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a73e6edcbf3cdd82796dcdf0c0f5fe5d91021af"
        },
        {
          "url": "https://git.kernel.org/stable/c/7efe61dc6aa45aab8a40e304fa2dae21e33b0db4"
        },
        {
          "url": "https://git.kernel.org/stable/c/5177bdc38eaa1c1ca6302214ab06913540cd00a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e3863cc02c156b51b50592d43ffa6a13b680b0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/16c546e148fa6d14a019431436a6f7b4087dbccd"
        }
      ],
      "title": "UM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50296",
    "datePublished": "2025-09-15T14:45:52.121Z",
    "dateReserved": "2025-09-15T14:18:36.811Z",
    "dateUpdated": "2025-09-15T14:45:52.121Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50296\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T15:15:40.987\",\"lastModified\":\"2025-09-15T15:22:27.090\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nUM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK\\n\\nWhen CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected,\\ncpu_max_bits_warn() generates a runtime warning similar as below while\\nwe show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit)\\ninstead of NR_CPUS to iterate CPUs.\\n\\n[    3.052463] ------------[ cut here ]------------\\n[    3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0\\n[    3.070072] Modules linked in: efivarfs autofs4\\n[    3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052\\n[    3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000\\n[    3.109127]         9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430\\n[    3.118774]         90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff\\n[    3.128412]         0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890\\n[    3.138056]         0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa\\n[    3.147711]         ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000\\n[    3.157364]         900000000101c998 0000000000000004 9000000000ef7430 0000000000000000\\n[    3.167012]         0000000000000009 000000000000006c 0000000000000000 0000000000000000\\n[    3.176641]         9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286\\n[    3.186260]         00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c\\n[    3.195868]         ...\\n[    3.199917] Call Trace:\\n[    3.203941] [\u003c90000000002086d8\u003e] show_stack+0x38/0x14c\\n[    3.210666] [\u003c9000000000cf846c\u003e] dump_stack_lvl+0x60/0x88\\n[    3.217625] [\u003c900000000023d268\u003e] __warn+0xd0/0x100\\n[    3.223958] [\u003c9000000000cf3c90\u003e] warn_slowpath_fmt+0x7c/0xcc\\n[    3.231150] [\u003c9000000000210220\u003e] show_cpuinfo+0x5e8/0x5f0\\n[    3.238080] [\u003c90000000004f578c\u003e] seq_read_iter+0x354/0x4b4\\n[    3.245098] [\u003c90000000004c2e90\u003e] new_sync_read+0x17c/0x1c4\\n[    3.252114] [\u003c90000000004c5174\u003e] vfs_read+0x138/0x1d0\\n[    3.258694] [\u003c90000000004c55f8\u003e] ksys_read+0x70/0x100\\n[    3.265265] [\u003c9000000000cfde9c\u003e] do_syscall+0x7c/0x94\\n[    3.271820] [\u003c9000000000202fe4\u003e] handle_syscall+0xc4/0x160\\n[    3.281824] ---[ end trace 8b484262b4b8c24c ]---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/16c546e148fa6d14a019431436a6f7b4087dbccd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2e3863cc02c156b51b50592d43ffa6a13b680b0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5177bdc38eaa1c1ca6302214ab06913540cd00a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6a73e6edcbf3cdd82796dcdf0c0f5fe5d91021af\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7efe61dc6aa45aab8a40e304fa2dae21e33b0db4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/844748412be03a236dcf4a208b588162a275e189\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cd251d39b13485eb94ee65bb000d024e02c00e45\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dbd964a733db015bbb9dff592c259c736398140f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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