Vulnerability-Lookup

FKIE_CVE-2025-71142

Vulnerability from fkie_nvd - Published: 2026-01-14 15:16 - Updated: 2026-03-25 18:02

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: cpuset: fix warning when disabling remote partition A warning was triggered as follows: WARNING: kernel/cgroup/cpuset.c:1651 at remote_partition_disable+0xf7/0x110 RIP: 0010:remote_partition_disable+0xf7/0x110 RSP: 0018:ffffc90001947d88 EFLAGS: 00000206 RAX: 0000000000007fff RBX: ffff888103b6e000 RCX: 0000000000006f40 RDX: 0000000000006f00 RSI: ffffc90001947da8 RDI: ffff888103b6e000 RBP: ffff888103b6e000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88810b2e2728 R12: ffffc90001947da8 R13: 0000000000000000 R14: ffffc90001947da8 R15: ffff8881081f1c00 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f55c8bbe0b2 CR3: 000000010b14c000 CR4: 00000000000006f0 Call Trace: <TASK> update_prstate+0x2d3/0x580 cpuset_partition_write+0x94/0xf0 kernfs_fop_write_iter+0x147/0x200 vfs_write+0x35d/0x500 ksys_write+0x66/0xe0 do_syscall_64+0x6b/0x390 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f55c8cd4887 Reproduction steps (on a 16-CPU machine): # cd /sys/fs/cgroup/ # mkdir A1 # echo +cpuset > A1/cgroup.subtree_control # echo "0-14" > A1/cpuset.cpus.exclusive # mkdir A1/A2 # echo "0-14" > A1/A2/cpuset.cpus.exclusive # echo "root" > A1/A2/cpuset.cpus.partition # echo 0 > /sys/devices/system/cpu/cpu15/online # echo member > A1/A2/cpuset.cpus.partition When CPU 15 is offlined, subpartitions_cpus gets cleared because no CPUs remain available for the top_cpuset, forcing partitions to share CPUs with the top_cpuset. In this scenario, disabling the remote partition triggers a warning stating that effective_xcpus is not a subset of subpartitions_cpus. Partitions should be invalidated in this case to inform users that the partition is now invalid(cpus are shared with top_cpuset). To fix this issue: 1. Only emit the warning only if subpartitions_cpus is not empty and the effective_xcpus is not a subset of subpartitions_cpus. 2. During the CPU hotplug process, invalidate partitions if subpartitions_cpus is empty.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5d8b9d38a7676be7bb5e7d57f92156a98dab39fb	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/aa7d3a56a20f07978d9f401e13637a6479b13bd0	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	6.15
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

To clipboard

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpuset: fix warning when disabling remote partition\n\nA warning was triggered as follows:\n\nWARNING: kernel/cgroup/cpuset.c:1651 at remote_partition_disable+0xf7/0x110\nRIP: 0010:remote_partition_disable+0xf7/0x110\nRSP: 0018:ffffc90001947d88 EFLAGS: 00000206\nRAX: 0000000000007fff RBX: ffff888103b6e000 RCX: 0000000000006f40\nRDX: 0000000000006f00 RSI: ffffc90001947da8 RDI: ffff888103b6e000\nRBP: ffff888103b6e000 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000001 R11: ffff88810b2e2728 R12: ffffc90001947da8\nR13: 0000000000000000 R14: ffffc90001947da8 R15: ffff8881081f1c00\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f55c8bbe0b2 CR3: 000000010b14c000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n update_prstate+0x2d3/0x580\n cpuset_partition_write+0x94/0xf0\n kernfs_fop_write_iter+0x147/0x200\n vfs_write+0x35d/0x500\n ksys_write+0x66/0xe0\n do_syscall_64+0x6b/0x390\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\nRIP: 0033:0x7f55c8cd4887\n\nReproduction steps (on a 16-CPU machine):\n\n        # cd /sys/fs/cgroup/\n        # mkdir A1\n        # echo +cpuset \u003e A1/cgroup.subtree_control\n        # echo \"0-14\" \u003e A1/cpuset.cpus.exclusive\n        # mkdir A1/A2\n        # echo \"0-14\" \u003e A1/A2/cpuset.cpus.exclusive\n        # echo \"root\" \u003e A1/A2/cpuset.cpus.partition\n        # echo 0 \u003e /sys/devices/system/cpu/cpu15/online\n        # echo member \u003e A1/A2/cpuset.cpus.partition\n\nWhen CPU 15 is offlined, subpartitions_cpus gets cleared because no CPUs\nremain available for the top_cpuset, forcing partitions to share CPUs with\nthe top_cpuset. In this scenario, disabling the remote partition triggers\na warning stating that effective_xcpus is not a subset of\nsubpartitions_cpus. Partitions should be invalidated in this case to\ninform users that the partition is now invalid(cpus are shared with\ntop_cpuset).\n\nTo fix this issue:\n1. Only emit the warning only if subpartitions_cpus is not empty and the\n   effective_xcpus is not a subset of subpartitions_cpus.\n2. During the CPU hotplug process, invalidate partitions if\n   subpartitions_cpus is empty."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncpuset: solucionar advertencia al deshabilitar la partici\u00f3n remota\n\nSe activ\u00f3 una advertencia de la siguiente manera:\n\nWARNING: kernel/cgroup/cpuset.c:1651 at remote_partition_disable+0xf7/0x110\nRIP: 0010:remote_partition_disable+0xf7/0x110\nRSP: 0018:ffffc90001947d88 EFLAGS: 00000206\nRAX: 0000000000007fff RBX: ffff888103b6e000 RCX: 0000000000006f40\nRDX: 0000000000006f00 RSI: ffffc90001947da8 RDI: ffff888103b6e000\nRBP: ffff888103b6e000 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000001 R11: ffff88810b2e2728 R12: ffffc90001947da8\nR13: 0000000000000000 R14: ffffc90001947da8 R15: ffff8881081f1c00\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f55c8bbe0b2 CR3: 000000010b14c000 CR4: 00000000000006f0\nRastro de Llamada:\n \n update_prstate+0x2d3/0x580\n cpuset_partition_write+0x94/0xf0\n kernfs_fop_write_iter+0x147/0x200\n vfs_write+0x35d/0x500\n ksys_write+0x66/0xe0\n do_syscall_64+0x6b/0x390\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\nRIP: 0033:0x7f55c8cd4887\n\nPasos de reproducci\u00f3n (en una m\u00e1quina de 16 CPU):\n\n        # cd /sys/fs/cgroup/\n        # mkdir A1\n        # echo +cpuset \u0026gt; A1/cgroup.subtree_control\n        # echo \"0-14\" \u0026gt; A1/cpuset.cpus.exclusive\n        # mkdir A1/A2\n        # echo \"0-14\" \u0026gt; A1/A2/cpuset.cpus.exclusive\n        # echo \"root\" \u0026gt; A1/A2/cpuset.cpus.partition\n        # echo 0 \u0026gt; /sys/devices/system/cpu/cpu15/online\n        # echo member \u0026gt; A1/A2/cpuset.cpus.partition\n\nCuando la CPU 15 se pone fuera de l\u00ednea, subpartitions_cpus se borra porque no quedan CPU disponibles para el top_cpuset, forzando a las particiones a compartir CPU con el top_cpuset. En este escenario, deshabilitar la partici\u00f3n remota activa una advertencia indicando que effective_xcpus no es un subconjunto de subpartitions_cpus. Las particiones deber\u00edan ser invalidadas en este caso para informar a los usuarios que la partici\u00f3n ahora es inv\u00e1lida (las CPU se comparten con top_cpuset).\n\nPara solucionar este problema:\n1. Solo emitir la advertencia si subpartitions_cpus no est\u00e1 vac\u00edo y effective_xcpus no es un subconjunto de subpartitions_cpus.\n2. Durante el proceso de hotplug de CPU, invalidar las particiones si subpartitions_cpus est\u00e1 vac\u00edo."
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}

CVE-2025-71142 (GCVE-0-2025-71142)

Vulnerability from cvelistv5 – Published: 2026-01-14 15:07 – Updated: 2026-05-11 21:55

Title

cpuset: fix warning when disabling remote partition

Summary

Severity

No CVSS data available.

Assigner

Linux

References

2 references

URL	Tags
https://git.kernel.org/stable/c/5d8b9d38a7676be7b…
https://git.kernel.org/stable/c/aa7d3a56a20f07978…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f62a5d39368e34a966c8df63e1f05eed7fe9c5de , < 5d8b9d38a7676be7bb5e7d57f92156a98dab39fb (git) Affected: f62a5d39368e34a966c8df63e1f05eed7fe9c5de , < aa7d3a56a20f07978d9f401e13637a6479b13bd0 (git)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 6.18.4 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/cgroup/cpuset.c"
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          "vendor": "Linux",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpuset: fix warning when disabling remote partition\n\nA warning was triggered as follows:\n\nWARNING: kernel/cgroup/cpuset.c:1651 at remote_partition_disable+0xf7/0x110\nRIP: 0010:remote_partition_disable+0xf7/0x110\nRSP: 0018:ffffc90001947d88 EFLAGS: 00000206\nRAX: 0000000000007fff RBX: ffff888103b6e000 RCX: 0000000000006f40\nRDX: 0000000000006f00 RSI: ffffc90001947da8 RDI: ffff888103b6e000\nRBP: ffff888103b6e000 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000001 R11: ffff88810b2e2728 R12: ffffc90001947da8\nR13: 0000000000000000 R14: ffffc90001947da8 R15: ffff8881081f1c00\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f55c8bbe0b2 CR3: 000000010b14c000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n update_prstate+0x2d3/0x580\n cpuset_partition_write+0x94/0xf0\n kernfs_fop_write_iter+0x147/0x200\n vfs_write+0x35d/0x500\n ksys_write+0x66/0xe0\n do_syscall_64+0x6b/0x390\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\nRIP: 0033:0x7f55c8cd4887\n\nReproduction steps (on a 16-CPU machine):\n\n        # cd /sys/fs/cgroup/\n        # mkdir A1\n        # echo +cpuset \u003e A1/cgroup.subtree_control\n        # echo \"0-14\" \u003e A1/cpuset.cpus.exclusive\n        # mkdir A1/A2\n        # echo \"0-14\" \u003e A1/A2/cpuset.cpus.exclusive\n        # echo \"root\" \u003e A1/A2/cpuset.cpus.partition\n        # echo 0 \u003e /sys/devices/system/cpu/cpu15/online\n        # echo member \u003e A1/A2/cpuset.cpus.partition\n\nWhen CPU 15 is offlined, subpartitions_cpus gets cleared because no CPUs\nremain available for the top_cpuset, forcing partitions to share CPUs with\nthe top_cpuset. In this scenario, disabling the remote partition triggers\na warning stating that effective_xcpus is not a subset of\nsubpartitions_cpus. Partitions should be invalidated in this case to\ninform users that the partition is now invalid(cpus are shared with\ntop_cpuset).\n\nTo fix this issue:\n1. Only emit the warning only if subpartitions_cpus is not empty and the\n   effective_xcpus is not a subset of subpartitions_cpus.\n2. During the CPU hotplug process, invalidate partitions if\n   subpartitions_cpus is empty."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:55:47.485Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/aa7d3a56a20f07978d9f401e13637a6479b13bd0"
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      "title": "cpuset: fix warning when disabling remote partition",
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    "cveId": "CVE-2025-71142",
    "datePublished": "2026-01-14T15:07:55.145Z",
    "dateReserved": "2026-01-13T15:30:19.661Z",
    "dateUpdated": "2026-05-11T21:55:47.485Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-71142

CVE-2025-71142 (GCVE-0-2025-71142)

Tags

Sightings

Nomenclature