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CVE-2026-74272 (GCVE-0-2026-74272)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:16
VLAI
Title
cxl/region: Resolve region deletion races
Summary
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Resolve region deletion races Sungwoo noticed that the sysfs trigger to delete a region may try to delete a region multiple times. It also has no exclusion relative to the kernel releasing the region via CXL root device teardown. Instead of installing new cxl root devres actions per region, use the existing root decoder unregistration event to remove all remaining regions. An xarray of regions replaces a devres list of regions. This handles 3 separate issues with the old approach: 1/ sysfs users racing to delete the same region: no longer possible now that the regions_lock is held over the lookup and deletion. 2/ multiple actions triggering deletion of the same region: solved by erasing regions while holding @regions_lock, and only proceeding on successful erasure. 3/ userspace racing devres_release_all() to trigger the devres not found warning: solved by sysfs unregistration not requiring a release action
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 779dd20cfb56c510f89877cca45529fa9f8bc450 , < be44c1c04f85d7b7ac1c597a30b443bbd346acbd (git)
Affected: 779dd20cfb56c510f89877cca45529fa9f8bc450 , < 4dd86ca99ffcc413cbf79063fd9956ef54e0ca91 (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/core.h",
            "drivers/cxl/core/port.c",
            "drivers/cxl/core/region.c",
            "drivers/cxl/cxl.h"
          ],
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Resolve region deletion races\n\nSungwoo noticed that the sysfs trigger to delete a region may try to delete\na region multiple times. It also has no exclusion relative to the kernel\nreleasing the region via CXL root device teardown.\n\nInstead of installing new cxl root devres actions per region, use the\nexisting root decoder unregistration event to remove all remaining regions.\nAn xarray of regions replaces a devres list of regions.\n\nThis handles 3 separate issues with the old approach:\n\n1/ sysfs users racing to delete the same region: no longer possible now\n   that the regions_lock is held over the lookup and deletion.\n\n2/ multiple actions triggering deletion of the same region: solved by\n   erasing regions while holding @regions_lock, and only proceeding on\n   successful erasure.\n\n3/ userspace racing devres_release_all() to trigger the devres not found\n   warning: solved by sysfs unregistration not requiring a release action"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:16:16.068Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd"
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          "url": "https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74272",
    "datePublished": "2026-08-15T05:57:45.494Z",
    "dateReserved": "2026-08-15T05:44:03.879Z",
    "dateUpdated": "2026-08-17T05:16:16.068Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74272.json",
      "version": "3"
    }
  }
}



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