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CVE-2026-72010 (GCVE-0-2026-72010)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-17 05:06
VLAI
Title
cgroup/cpuset: rebind mm mempolicy to effective_mems, not mems_allowed
Summary
In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: rebind mm mempolicy to effective_mems, not mems_allowed Creating a child cpuset where cpuset.mems is never set leads to a div/0 when a VMA mempolicy with MPOL_F_RELATIVE_NODES rebinds in response to a CPU hotplug event. Reproduction steps: 1) Create a cgroup w/ cpuset controls (do not set cpuset.mems) 2) Move the task into the child cpuset 3) Create a VMA mempolicy for that task with MPOL_F_RELATIVE_NODES 4) unplug and hotplug a cpu echo 0 > /sys/devices/system/cpu/cpu1/online echo 1 > /sys/devices/system/cpu/cpu1/online 5) mempolicy rebind does a div/0 in mpol_relative_nodemask on the call to __nodes_fold() The cpuset code passes (cs->mems_allowed) which is not guaranteed to have nodes to the rebind routine. Use cs->effective_mems instead, which is guaranteed to have a non-empty nodemask once we reach that code path. [ david: add a comment, slightly rephrase description ]
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d (git)
Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < fcc8c310539c3cc523419113b227161a96b50550 (git)
Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < 4b06449384b9ee5b3372bab60601ba5cd4162086 (git)
Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < 02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7 (git)
Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < fc680afc510157f6b137956011c09abc23eb0842 (git)
Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < c844b7d9a9586de15dd28c06da5cc7f6ab28787d (git)
Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < c17f06d8a085d6be58b544a440ce243f5e441a60 (git)
Affected: ae1c802382f7af60aa54879fb4f5920a9df1ff48 , < b983c56426383e4a06fa5970c4e33cee879b1482 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (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\ncgroup/cpuset: rebind mm mempolicy to effective_mems, not mems_allowed\n\nCreating a child cpuset where cpuset.mems is never set leads to a div/0\nwhen a VMA mempolicy with MPOL_F_RELATIVE_NODES rebinds in response to a\nCPU hotplug event.\n\nReproduction steps:\n 1) Create a cgroup w/ cpuset controls (do not set cpuset.mems)\n 2) Move the task into the child cpuset\n 3) Create a VMA mempolicy for that task with MPOL_F_RELATIVE_NODES\n 4) unplug and hotplug a cpu\n      echo 0 \u003e /sys/devices/system/cpu/cpu1/online\n      echo 1 \u003e /sys/devices/system/cpu/cpu1/online\n 5) mempolicy rebind does a div/0 in mpol_relative_nodemask on the\n    call to __nodes_fold()\n\nThe cpuset code passes (cs-\u003emems_allowed) which is not guaranteed to have\nnodes to the rebind routine.  Use cs-\u003eeffective_mems instead, which is\nguaranteed to have a non-empty nodemask once we reach that code path.\n\n[ david: add a comment, slightly rephrase description ]"
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    "datePublished": "2026-08-15T05:51:39.755Z",
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    "dateUpdated": "2026-08-17T05:06:32.084Z",
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Use cs-\u003eeffective_mems instead, which is\\nguaranteed to have a non-empty nodemask once we reach that code path.\\n\\n[ david: add a comment, slightly rephrase description ]\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/cgroup/cpuset.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"fcc8c310539c3cc523419113b227161a96b50550\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"4b06449384b9ee5b3372bab60601ba5cd4162086\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"fc680afc510157f6b137956011c09abc23eb0842\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"c844b7d9a9586de15dd28c06da5cc7f6ab28787d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"c17f06d8a085d6be58b544a440ce243f5e441a60\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae1c802382f7af60aa54879fb4f5920a9df1ff48\",\"lessThan\":\"b983c56426383e4a06fa5970c4e33cee879b1482\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/cgroup/cpuset.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4b06449384b9ee5b3372bab60601ba5cd4162086\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b983c56426383e4a06fa5970c4e33cee879b1482\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c17f06d8a085d6be58b544a440ce243f5e441a60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c844b7d9a9586de15dd28c06da5cc7f6ab28787d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fc680afc510157f6b137956011c09abc23eb0842\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fcc8c310539c3cc523419113b227161a96b50550\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-19T05:26:39+00:00",
      "cve": "CVE-2026-72010",
      "id": "CVE-2026-72010",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cgroup/cpuset: rebind mm mempolicy to effective_mems, not mems_allowed",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72010.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.