CVE-2026-98972 (GCVE-0-2026-98972)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:19 – Updated: 2026-10-23 12:19
VLAI
Title
cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode()
Summary
In the Linux kernel, the following vulnerability has been resolved: cgroup/cpuset: Don't access cpuset_cgrp_subsys.root in is_in_v2_mode() After seeing the patch [1] to guard is_in_v2_mode() with RCU, it makes me realize that is_in_v2_mode() may be called in a context where a new cgroup filesystem is being rebound with stale cpuset_cgrp_subsys.root pointer. Avoid this potential UaF situation by adding a new cpuset_v2_mode flag which is set when the cpuset_v2_mode mount option is used. This flag is written into only when cpuset_bind() is being called with a stable cpuset_cgrp_subsys.root value. The is_in_v2_mode() helper is modified to read the new cpuset_v2_mode flag instead of accessing cpuset_cgrp_subsys.root directly. [1] https://lore.kernel.org/lkml/20260929084124.626693-2-arighi@nvidia.com
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b8d1b8ee93df8ffbabbeadd65d39853cfad6d698 , < 988bf67a13890a37a33201f95947095ca9bec856 (git)
Affected: b8d1b8ee93df8ffbabbeadd65d39853cfad6d698 , < e06b678e3b4e12fdaa0b51a7a5a54abc5dbd6469 (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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    "datePublished": "2026-10-23T12:19:45.458Z",
    "dateReserved": "2026-09-25T10:25:14.383Z",
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      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
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      "title": "cgroup/cpuset: Don\u0027t access cpuset_cgrp_subsys.root in is_in_v2_mode()",
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        "vulnStatus": "Received"
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    }
  }
}



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