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CVE-2026-72181 (GCVE-0-2026-72181)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-19 16:36
VLAI
Title
mips: sched: Fix CPUMASK_OFFSTACK memory corruption
Summary
In the Linux kernel, the following vulnerability has been resolved: mips: sched: Fix CPUMASK_OFFSTACK memory corruption This patch addresses a critical memory management flaw. When CONFIG_CPUMASK_OFFSTACK is enabled, cpumask_var_t is a pointer. Consequently, sizeof(new_mask) evaluates to the pointer size, causing copy_from_user() to clobber the mask pointer. Furthermore, the old logic performed copy_from_user() before allocating the mask. Fix this by allocating new_mask first. To handle variable-sized user masks correctly, use cpumask_size() to truncate overly large user masks or pad undersized masks with zeros before copying the data directly into the allocated buffer.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < 2f7730c03a9deea3ba7a1c980070d363b4ea2046 (git)
Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < d20ee42f8226607b5693b2bc2f115ca2d270221a (git)
Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < 15ba8053fe4162c933855f1676fb321cdb6251c7 (git)
Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < 3446ffb5d03c36f9ce88ede7ca5be319a2968d96 (git)
Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < 87a56c1e8e36d06ebe8640432f911538ded7827d (git)
Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < 1caee6e084a96ada94658f261ced377d85af3f03 (git)
Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c (git)
Affected: 295cbf6d63165fe4253cf1d9ceadcda47a318b48 , < 98e37db4a34d3af3fb2f4648295c25b5e40b20e3 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.23
Unaffected: 0 , < 2.6.23 (semver)
Unaffected: 5.10.265 , ≤ 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\nmips: sched: Fix CPUMASK_OFFSTACK memory corruption\n\nThis patch addresses a critical memory management flaw. When\nCONFIG_CPUMASK_OFFSTACK is enabled, cpumask_var_t is a pointer.\nConsequently, sizeof(new_mask) evaluates to the pointer size, causing\ncopy_from_user() to clobber the mask pointer. Furthermore, the old\nlogic performed copy_from_user() before allocating the mask.\n\nFix this by allocating new_mask first. To handle variable-sized user\nmasks correctly, use cpumask_size() to truncate overly large user masks\nor pad undersized masks with zeros before copying the data directly into\nthe allocated buffer."
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-18T15:20:39+00:00",
      "cve": "CVE-2026-72181",
      "id": "CVE-2026-72181",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mips: sched: Fix CPUMASK_OFFSTACK memory corruption",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72181.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.
  • 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.