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CVE-2022-50103 (GCVE-0-2022-50103)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2026-05-11 19:12
VLAI
Title
sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed
Summary
In the Linux kernel, the following vulnerability has been resolved: sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed With cgroup v2, the cpuset's cpus_allowed mask can be empty indicating that the cpuset will just use the effective CPUs of its parent. So cpuset_can_attach() can call task_can_attach() with an empty mask. This can lead to cpumask_any_and() returns nr_cpu_ids causing the call to dl_bw_of() to crash due to percpu value access of an out of bound CPU value. For example: [80468.182258] BUG: unable to handle page fault for address: ffffffff8b6648b0 : [80468.191019] RIP: 0010:dl_cpu_busy+0x30/0x2b0 : [80468.207946] Call Trace: [80468.208947] cpuset_can_attach+0xa0/0x140 [80468.209953] cgroup_migrate_execute+0x8c/0x490 [80468.210931] cgroup_update_dfl_csses+0x254/0x270 [80468.211898] cgroup_subtree_control_write+0x322/0x400 [80468.212854] kernfs_fop_write_iter+0x11c/0x1b0 [80468.213777] new_sync_write+0x11f/0x1b0 [80468.214689] vfs_write+0x1eb/0x280 [80468.215592] ksys_write+0x5f/0xe0 [80468.216463] do_syscall_64+0x5c/0x80 [80468.224287] entry_SYSCALL_64_after_hwframe+0x44/0xae Fix that by using effective_cpus instead. For cgroup v1, effective_cpus is the same as cpus_allowed. For v2, effective_cpus is the real cpumask to be used by tasks within the cpuset anyway. Also update task_can_attach()'s 2nd argument name to cs_effective_cpus to reflect the change. In addition, a check is added to task_can_attach() to guard against the possibility that cpumask_any_and() may return a value >= nr_cpu_ids.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7f51412a415d87ea8598d14722fb31e4f5701257 , < 336626564b58071b8980a4e6a31a8f5d92705d9b (git)
Affected: 7f51412a415d87ea8598d14722fb31e4f5701257 , < 147f66d22f58712dce7ccdd6a1f6cb3ee8042df4 (git)
Affected: 7f51412a415d87ea8598d14722fb31e4f5701257 , < 357f3f0e522a6ce1ce4a571cb780d9861d53bec7 (git)
Affected: 7f51412a415d87ea8598d14722fb31e4f5701257 , < f56607b44c9896e51678a7e8cdd3a5479f4b4548 (git)
Affected: 7f51412a415d87ea8598d14722fb31e4f5701257 , < b6e8d40d43ae4dec00c8fea2593eeea3114b8f44 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.19
Unaffected: 0 , < 3.19 (semver)
Unaffected: 5.10.137 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched, cpuset: Fix dl_cpu_busy() panic due to empty cs-\u003ecpus_allowed\n\nWith cgroup v2, the cpuset\u0027s cpus_allowed mask can be empty indicating\nthat the cpuset will just use the effective CPUs of its parent. So\ncpuset_can_attach() can call task_can_attach() with an empty mask.\nThis can lead to cpumask_any_and() returns nr_cpu_ids causing the call\nto dl_bw_of() to crash due to percpu value access of an out of bound\nCPU value. For example:\n\n\t[80468.182258] BUG: unable to handle page fault for address: ffffffff8b6648b0\n\t  :\n\t[80468.191019] RIP: 0010:dl_cpu_busy+0x30/0x2b0\n\t  :\n\t[80468.207946] Call Trace:\n\t[80468.208947]  cpuset_can_attach+0xa0/0x140\n\t[80468.209953]  cgroup_migrate_execute+0x8c/0x490\n\t[80468.210931]  cgroup_update_dfl_csses+0x254/0x270\n\t[80468.211898]  cgroup_subtree_control_write+0x322/0x400\n\t[80468.212854]  kernfs_fop_write_iter+0x11c/0x1b0\n\t[80468.213777]  new_sync_write+0x11f/0x1b0\n\t[80468.214689]  vfs_write+0x1eb/0x280\n\t[80468.215592]  ksys_write+0x5f/0xe0\n\t[80468.216463]  do_syscall_64+0x5c/0x80\n\t[80468.224287]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nFix that by using effective_cpus instead. For cgroup v1, effective_cpus\nis the same as cpus_allowed. For v2, effective_cpus is the real cpumask\nto be used by tasks within the cpuset anyway.\n\nAlso update task_can_attach()\u0027s 2nd argument name to cs_effective_cpus to\nreflect the change. In addition, a check is added to task_can_attach()\nto guard against the possibility that cpumask_any_and() may return a\nvalue \u003e= nr_cpu_ids."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:12:53.594Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/b6e8d40d43ae4dec00c8fea2593eeea3114b8f44"
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      "title": "sched, cpuset: Fix dl_cpu_busy() panic due to empty cs-\u003ecpus_allowed",
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    "cveId": "CVE-2022-50103",
    "datePublished": "2025-06-18T11:02:38.840Z",
    "dateReserved": "2025-06-18T10:57:27.413Z",
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      "date": "2026-09-17",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50103\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:39.670\",\"lastModified\":\"2026-06-17T05:22:46.027\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsched, cpuset: Fix dl_cpu_busy() panic due to empty cs-\u003ecpus_allowed\\n\\nWith cgroup v2, the cpuset\u0027s cpus_allowed mask can be empty indicating\\nthat the cpuset will just use the effective CPUs of its parent. So\\ncpuset_can_attach() can call task_can_attach() with an empty mask.\\nThis can lead to cpumask_any_and() returns nr_cpu_ids causing the call\\nto dl_bw_of() to crash due to percpu value access of an out of bound\\nCPU value. For example:\\n\\n\\t[80468.182258] BUG: unable to handle page fault for address: ffffffff8b6648b0\\n\\t  :\\n\\t[80468.191019] RIP: 0010:dl_cpu_busy+0x30/0x2b0\\n\\t  :\\n\\t[80468.207946] Call Trace:\\n\\t[80468.208947]  cpuset_can_attach+0xa0/0x140\\n\\t[80468.209953]  cgroup_migrate_execute+0x8c/0x490\\n\\t[80468.210931]  cgroup_update_dfl_csses+0x254/0x270\\n\\t[80468.211898]  cgroup_subtree_control_write+0x322/0x400\\n\\t[80468.212854]  kernfs_fop_write_iter+0x11c/0x1b0\\n\\t[80468.213777]  new_sync_write+0x11f/0x1b0\\n\\t[80468.214689]  vfs_write+0x1eb/0x280\\n\\t[80468.215592]  ksys_write+0x5f/0xe0\\n\\t[80468.216463]  do_syscall_64+0x5c/0x80\\n\\t[80468.224287]  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nFix that by using effective_cpus instead. For cgroup v1, effective_cpus\\nis the same as cpus_allowed. For v2, effective_cpus is the real cpumask\\nto be used by tasks within the cpuset anyway.\\n\\nAlso update task_can_attach()\u0027s 2nd argument name to cs_effective_cpus to\\nreflect the change. In addition, a check is added to task_can_attach()\\nto guard against the possibility that cpumask_any_and() may return a\\nvalue \u003e= nr_cpu_ids.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sched, cpuset: Se solucion\u00f3 el p\u00e1nico de dl_cpu_busy() debido a un valor de cs-\u0026gt;cpus_allowed vac\u00edo. Con cgroup v2, la m\u00e1scara cpus_allowed de cpuset puede estar vac\u00eda, lo que indica que solo usar\u00e1 las CPU efectivas de su padre. Por lo tanto, cpuset_can_attach() puede llamar a task_can_attach() con una m\u00e1scara vac\u00eda. Esto puede provocar que cpumask_any_and() devuelva nr_cpu_ids, lo que provoca el bloqueo de la llamada a dl_bw_of() debido al acceso a un valor de CPU fuera de los l\u00edmites. Por ejemplo: [80468.182258] ERROR: no se puede manejar el error de p\u00e1gina para la direcci\u00f3n: ffffffff8b6648b0 : [80468.191019] RIP: 0010:dl_cpu_busy+0x30/0x2b0 : [80468.207946] Rastreo de llamadas: [80468.208947] cpuset_can_attach+0xa0/0x140 [80468.209953] cgroup_migrate_execute+0x8c/0x490 [80468.210931] cgroup_update_dfl_csses+0x254/0x270 [80468.211898] Solucione esto utilizando effective_cpus en su lugar. Para cgroup v1, effective_cpus es igual que cpus_allowed. Para v2, effective_cpus es la m\u00e1scara de CPU real que usar\u00e1n las tareas dentro del conjunto de CPU. Actualice tambi\u00e9n el segundo argumento de task_can_attach() a cs_effective_cpus para reflejar el cambio. Adem\u00e1s, se ha a\u00f1adido una comprobaci\u00f3n a task_can_attach() para evitar que cpumask_any_and() devuelva un valor mayor que nr_cpu_ids.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"include/linux/sched.h\",\"kernel/cgroup/cpuset.c\",\"kernel/sched/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7f51412a415d87ea8598d14722fb31e4f5701257\",\"lessThan\":\"336626564b58071b8980a4e6a31a8f5d92705d9b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7f51412a415d87ea8598d14722fb31e4f5701257\",\"lessThan\":\"147f66d22f58712dce7ccdd6a1f6cb3ee8042df4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7f51412a415d87ea8598d14722fb31e4f5701257\",\"lessThan\":\"357f3f0e522a6ce1ce4a571cb780d9861d53bec7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7f51412a415d87ea8598d14722fb31e4f5701257\",\"lessThan\":\"f56607b44c9896e51678a7e8cdd3a5479f4b4548\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7f51412a415d87ea8598d14722fb31e4f5701257\",\"lessThan\":\"b6e8d40d43ae4dec00c8fea2593eeea3114b8f44\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"include/linux/sched.h\",\"kernel/cgroup/cpuset.c\",\"kernel/sched/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.137\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.61\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.18\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19.2\",\"lessThanOrEqual\":\"5.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.19\",\"versionEndExcluding\":\"5.10.137\",\"matchCriteriaId\":\"D7F94E3E-3387-47A2-BF64-B07D883DD8C4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.61\",\"matchCriteriaId\":\"51861563-7F40-460F-82CD-2D3FBDAD6618\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.18.18\",\"matchCriteriaId\":\"5B42E453-8837-49D0-A5EF-03F818A6DC11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19\",\"versionEndExcluding\":\"5.19.2\",\"matchCriteriaId\":\"A1A2A5A5-4598-4D7E-BA07-4660398D6C8F\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/147f66d22f58712dce7ccdd6a1f6cb3ee8042df4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/336626564b58071b8980a4e6a31a8f5d92705d9b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/357f3f0e522a6ce1ce4a571cb780d9861d53bec7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b6e8d40d43ae4dec00c8fea2593eeea3114b8f44\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f56607b44c9896e51678a7e8cdd3a5479f4b4548\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:39:30+00:00",
      "cve": "CVE-2022-50103",
      "id": "CVE-2022-50103",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: sched, cpuset: Fix dl_cpu_busy() panic due to empty cs-\u003ecpus_allowed",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50103.json",
      "version": "3"
    }
  }
}



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