{"id":"CVE-2026-72010","title":"cgroup/cpuset: rebind mm mempolicy to effective_mems, not mems_allowed","summary":"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 wit…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d","Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < fcc8c310539c3cc523419113b227161a96b50550","Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < 4b06449384b9ee5b3372bab60601ba5cd4162086","Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < 02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7","Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < fc680afc510157f6b137956011c09abc23eb0842","Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < c844b7d9a9586de15dd28c06da5cc7f6ab28787d","Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < c17f06d8a085d6be58b544a440ce243f5e441a60","Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < b983c56426383e4a06fa5970c4e33cee879b1482","Linux 3.17"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:50:22.064855Z"},"published":"2026-08-15","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:55:18.130Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72010","references":[{"url":"https://git.kernel.org/stable/c/b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d"},{"url":"https://git.kernel.org/stable/c/fcc8c310539c3cc523419113b227161a96b50550"},{"url":"https://git.kernel.org/stable/c/4b06449384b9ee5b3372bab60601ba5cd4162086"},{"url":"https://git.kernel.org/stable/c/02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7"},{"url":"https://git.kernel.org/stable/c/fc680afc510157f6b137956011c09abc23eb0842"},{"url":"https://git.kernel.org/stable/c/c844b7d9a9586de15dd28c06da5cc7f6ab28787d"},{"url":"https://git.kernel.org/stable/c/c17f06d8a085d6be58b544a440ce243f5e441a60"},{"url":"https://git.kernel.org/stable/c/b983c56426383e4a06fa5970c4e33cee879b1482"}],"tags":["cve.org"],"epss":0.0022,"epssPercentile":0.12553,"ingestedAt":"2026-11-06T18:00:12.600Z","slug":"CVE-2026-72010","body":"## Overview\n\nIn 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 ]\n\n## Affected\n\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < b7adeba2a21c98c7b20f18e27e3ead86bdb5e08d`\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < fcc8c310539c3cc523419113b227161a96b50550`\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < 4b06449384b9ee5b3372bab60601ba5cd4162086`\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < 02f67c4f88be8e3dbd91951d13cdcc5bcc82e9c7`\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < fc680afc510157f6b137956011c09abc23eb0842`\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < c844b7d9a9586de15dd28c06da5cc7f6ab28787d`\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < c17f06d8a085d6be58b544a440ce243f5e441a60`\n- `Linux >= ae1c802382f7af60aa54879fb4f5920a9df1ff48 < b983c56426383e4a06fa5970c4e33cee879b1482`\n- `Linux 3.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}