CVE-2026-72010

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 ]

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7
https://git.kernel.org/stable/c/4b06449384b9ee5b3372bab60601ba5cd4162086
https://git.kernel.org/stable/c/b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d
https://git.kernel.org/stable/c/b983c56426383e4a06fa5970c4e33cee879b1482
https://git.kernel.org/stable/c/c17f06d8a085d6be58b544a440ce243f5e441a60
https://git.kernel.org/stable/c/c844b7d9a9586de15dd28c06da5cc7f6ab28787d
https://git.kernel.org/stable/c/fc680afc510157f6b137956011c09abc23eb0842
https://git.kernel.org/stable/c/fcc8c310539c3cc523419113b227161a96b50550

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:20

Updated : 2026-08-17 06:17

NVD link : CVE-2026-72010

Mitre link : CVE-2026-72010

CVE.ORG link : CVE-2026-72010

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-72010", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "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"}], "programFiles": ["kernel/cgroup/cpuset.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.17"}, {"status": "unaffected", "version": "0", "lessThan": "3.17", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/cgroup/cpuset.c"], "defaultStatus": "affected"}]}], "published": "2026-08-15T06:20:59.670", "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"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "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 > /sys/devices/system/cpu/cpu1/online\n echo 1 > /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->mems_allowed) which is not guaranteed to have\nnodes to the rebind routine. Use cs->effective_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 ]"}], "lastModified": "2026-08-17T06:17:58.447", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}