Vulnerability-Lookup

CVE-2026-93054 (GCVE-0-2026-93054)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-09-17 16:10

Title

uio: Fix stale info pointer in failed registration path

Summary

In the Linux kernel, the following vulnerability has been resolved: uio: Fix stale info pointer in failed registration path After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info. That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory. Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same "device gone" state as normal uio_unregister_device().

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/63eaa7663335d482a…
https://git.kernel.org/stable/c/df4faf65194ec6c31…
https://git.kernel.org/stable/c/506b43dde5f9ac006…
https://git.kernel.org/stable/c/15340b00e665af805…
https://git.kernel.org/stable/c/234156f6c6d9ec35d…
https://git.kernel.org/stable/c/16695e9059d80ea66…
https://git.kernel.org/stable/c/ec5bd6731183eb6f6…
https://git.kernel.org/stable/c/67b6fc084b034a91c…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < 63eaa7663335d482a8825c231213e312cacea567 (git) Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < df4faf65194ec6c315a59be4c6749eaeb3009243 (git) Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < 506b43dde5f9ac0068b1360e6b5dbee07fda59fb (git) Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < 15340b00e665af805523b08515294a1aa1778151 (git) Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < 234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac (git) Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < 16695e9059d80ea6661e8399064b0c01f641dd8c (git) Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < ec5bd6731183eb6f619140c9bef2ee11ed818c20 (git) Affected: a93e7b331568227500186a465fee3c2cb5dffd1f , < 67b6fc084b034a91c3ec7907a3fed89a2450f30b (git) Affected: 085d735c858934e5d5bfaedb1fc98bd9135e6ff1 (git) Affected: 4.14.100 , < 4.15 (semver)	guessed
Linux	Linux	Affected: 4.18 Unaffected: 0 , < 4.18 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)	guessed

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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix stale info pointer in failed registration path\n\nAfter device_add(), the UIO device is visible to userspace and /dev/uioX\ncan be opened. If a later setup step fails, __uio_register_device()\nunwinds the device but leaves idev-\u003einfo pointing at the caller-owned\nstruct uio_info.\n\nThat is unsafe when an opener races with the failed registration path.\nThe open file keeps a reference to the uio_device, while the caller sees\nregistration failure and may free its struct uio_info. Later file\noperations can then follow idev-\u003einfo and dereference freed memory.\n\nHandle post-device_add() failures like unregister: remove UIO attributes\nwhile the info pointer is still valid, then clear idev-\u003einfo under\ninfo_lock and wake existing waiters/async users before removing the\ndevice and minor. This makes already-open file descriptors observe the\nsame \"device gone\" state as normal uio_unregister_device()."
        }
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          }
        ],
        "id": "CVE-2026-93054",
        "lastModified": "2026-09-17T17:17:58.923",
        "metrics": {},
        "published": "2026-09-17T17:17:58.923",
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
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            "url": "https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20"
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-18T00:12:51Z",
      "cve": "CVE-2026-93054",
      "id": "CVE-2026-93054",
      "initial_release_date": "2026-09-18T00:12:51Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93054",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93054.json",
      "version": "2"
    }
  }
}

FKIE_CVE-2026-93054

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/uio/uio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "63eaa7663335d482a8825c231213e312cacea567",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "lessThan": "df4faf65194ec6c315a59be4c6749eaeb3009243",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "lessThan": "506b43dde5f9ac0068b1360e6b5dbee07fda59fb",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "lessThan": "15340b00e665af805523b08515294a1aa1778151",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "lessThan": "234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "lessThan": "16695e9059d80ea6661e8399064b0c01f641dd8c",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "lessThan": "ec5bd6731183eb6f619140c9bef2ee11ed818c20",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "lessThan": "67b6fc084b034a91c3ec7907a3fed89a2450f30b",
              "status": "affected",
              "version": "a93e7b331568227500186a465fee3c2cb5dffd1f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "085d735c858934e5d5bfaedb1fc98bd9135e6ff1",
              "versionType": "git"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.100",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/uio/uio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\nuio: Fix stale info pointer in failed registration path\n\nAfter device_add(), the UIO device is visible to userspace and /dev/uioX\ncan be opened. If a later setup step fails, __uio_register_device()\nunwinds the device but leaves idev-\u003einfo pointing at the caller-owned\nstruct uio_info.\n\nThat is unsafe when an opener races with the failed registration path.\nThe open file keeps a reference to the uio_device, while the caller sees\nregistration failure and may free its struct uio_info. Later file\noperations can then follow idev-\u003einfo and dereference freed memory.\n\nHandle post-device_add() failures like unregister: remove UIO attributes\nwhile the info pointer is still valid, then clear idev-\u003einfo under\ninfo_lock and wake existing waiters/async users before removing the\ndevice and minor. This makes already-open file descriptors observe the\nsame \"device gone\" state as normal uio_unregister_device()."
    }
  ],
  "id": "CVE-2026-93054",
  "lastModified": "2026-09-17T17:17:58.923",
  "metrics": {},
  "published": "2026-09-17T17:17:58.923",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-V69R-W76R-QV39

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

uio: Fix stale info pointer in failed registration path

After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info.

That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory.

Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same "device gone" state as normal uio_unregister_device().

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-93054"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix stale info pointer in failed registration path\n\nAfter device_add(), the UIO device is visible to userspace and /dev/uioX\ncan be opened. If a later setup step fails, __uio_register_device()\nunwinds the device but leaves idev-\u003einfo pointing at the caller-owned\nstruct uio_info.\n\nThat is unsafe when an opener races with the failed registration path.\nThe open file keeps a reference to the uio_device, while the caller sees\nregistration failure and may free its struct uio_info. Later file\noperations can then follow idev-\u003einfo and dereference freed memory.\n\nHandle post-device_add() failures like unregister: remove UIO attributes\nwhile the info pointer is still valid, then clear idev-\u003einfo under\ninfo_lock and wake existing waiters/async users before removing the\ndevice and minor. This makes already-open file descriptors observe the\nsame \"device gone\" state as normal uio_unregister_device().",
  "id": "GHSA-v69r-w76r-qv39",
  "modified": "2026-09-17T18:32:08Z",
  "published": "2026-09-17T18:32:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93054"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-93054 (GCVE-0-2026-93054)

FKIE_CVE-2026-93054

GHSA-V69R-W76R-QV39

Tags

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Nomenclature

Related by attack behaviour