GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

FKIE_CVE-2026-74272

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:19
Severity
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
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/core.h",
            "drivers/cxl/core/port.c",
            "drivers/cxl/core/region.c",
            "drivers/cxl/cxl.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "be44c1c04f85d7b7ac1c597a30b443bbd346acbd",
              "status": "affected",
              "version": "779dd20cfb56c510f89877cca45529fa9f8bc450",
              "versionType": "git"
            },
            {
              "lessThan": "4dd86ca99ffcc413cbf79063fd9956ef54e0ca91",
              "status": "affected",
              "version": "779dd20cfb56c510f89877cca45529fa9f8bc450",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/core.h",
            "drivers/cxl/core/port.c",
            "drivers/cxl/core/region.c",
            "drivers/cxl/cxl.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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"
    }
  ],
  "id": "CVE-2026-74272",
  "lastModified": "2026-08-17T06:19:20.927",
  "metrics": {},
  "published": "2026-08-15T06:22:26.597",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.