Vulnerability-Lookup

FKIE_CVE-2026-89741

Vulnerability from fkie_nvd - Published: 2026-09-11 20:20 - Updated: 2026-09-14 13:19

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: Revert "media: v4l2-dev: fix error handling in __video_register_device()" This reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a. The intentions of that patch were good, but it doesn't work. The idea is that if device_register fails, you have to do a put_device to let the ref counter release resources. However, the V4L2 API says that if video_register_device() fails, then you have to call video_device_release(), which kfree()s the video_device struct. But the put_device() will already have freed the struct, so you end up in a double-free scenario. There is not really a good way of fixing this without breaking video_register_device() into two parts, one that initializes everything, and one that does the actual device_register, and then converting all V4L2 drivers to this new model. That is a massive job, and it is very unlikely that device_register will fail. So rather than ending up in a double-free scenario, just revert this patch, and in that case we'll have a small memory leak. Which is a lot more robust.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2ac009a65d2385e9f0799eaf9d9694a29153a161
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3de14b4f681a1b3c6d375d98d9d37a55ebb85349
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/712ca1cf756de2557a116e0df55791bac0c9f99e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8027f82c0f5474ed72448e160ee9778051fa1f49
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8b998c171ed875e402e1fd1c5cd619e4ca05e9c1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/aad08b5f67d2a8116e1a00bce2611c1513b10bce
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ce792b94e03882108019ba996c1a7c4d4e09be2c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e7600f5cee5de14065f950807931d6e6d40fb2d7

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/v4l2-core/v4l2-dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8b998c171ed875e402e1fd1c5cd619e4ca05e9c1",
              "status": "affected",
              "version": "e5c8e62ae551e0ad2e15412aa0c57c2856d59677",
              "versionType": "git"
            },
            {
              "lessThan": "3de14b4f681a1b3c6d375d98d9d37a55ebb85349",
              "status": "affected",
              "version": "8b451a9a46f2bfc510e6d5c2492df91647586184",
              "versionType": "git"
            },
            {
              "lessThan": "8027f82c0f5474ed72448e160ee9778051fa1f49",
              "status": "affected",
              "version": "b6be1f5633eae200af2527e9eeb7f51be5739b0f",
              "versionType": "git"
            },
            {
              "lessThan": "2ac009a65d2385e9f0799eaf9d9694a29153a161",
              "status": "affected",
              "version": "ae7b143e05b36fc69d6571751855946cc45064c6",
              "versionType": "git"
            },
            {
              "lessThan": "712ca1cf756de2557a116e0df55791bac0c9f99e",
              "status": "affected",
              "version": "2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7",
              "versionType": "git"
            },
            {
              "lessThan": "aad08b5f67d2a8116e1a00bce2611c1513b10bce",
              "status": "affected",
              "version": "2a934fdb01db6458288fc9386d3d8ceba6dd551a",
              "versionType": "git"
            },
            {
              "lessThan": "ce792b94e03882108019ba996c1a7c4d4e09be2c",
              "status": "affected",
              "version": "2a934fdb01db6458288fc9386d3d8ceba6dd551a",
              "versionType": "git"
            },
            {
              "lessThan": "e7600f5cee5de14065f950807931d6e6d40fb2d7",
              "status": "affected",
              "version": "2a934fdb01db6458288fc9386d3d8ceba6dd551a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ee141706e701356dda41c6fed9ee18bf427c28e3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4451412739ed33a49b34624299394ee575116d0c",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.270",
              "status": "affected",
              "version": "5.10.239",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "5.15.186",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "6.1.142",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.157",
              "status": "affected",
              "version": "6.6.95",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.109",
              "status": "affected",
              "version": "6.12.35",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.295",
              "versionType": "semver"
            },
            {
              "lessThan": "6.16",
              "status": "affected",
              "version": "6.15.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/v4l2-core/v4l2-dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "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": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "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\nRevert \"media: v4l2-dev: fix error handling in __video_register_device()\"\n\nThis reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a.\n\nThe intentions of that patch were good, but it doesn\u0027t work.\n\nThe idea is that if device_register fails, you have to do a put_device\nto let the ref counter release resources.\n\nHowever, the V4L2 API says that if video_register_device() fails, then\nyou have to call video_device_release(), which kfree()s the video_device\nstruct.\n\nBut the put_device() will already have freed the struct, so you end\nup in a double-free scenario.\n\nThere is not really a good way of fixing this without breaking\nvideo_register_device() into two parts, one that initializes everything,\nand one that does the actual device_register, and then converting all\nV4L2 drivers to this new model.\n\nThat is a massive job, and it is very unlikely that device_register\nwill fail.\n\nSo rather than ending up in a double-free scenario, just revert this\npatch, and in that case we\u0027ll have a small memory leak. Which is a lot\nmore robust."
    }
  ],
  "id": "CVE-2026-89741",
  "lastModified": "2026-09-14T13:19:22.870",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-11T20:20:04.720",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2ac009a65d2385e9f0799eaf9d9694a29153a161"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3de14b4f681a1b3c6d375d98d9d37a55ebb85349"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/712ca1cf756de2557a116e0df55791bac0c9f99e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8027f82c0f5474ed72448e160ee9778051fa1f49"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8b998c171ed875e402e1fd1c5cd619e4ca05e9c1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/aad08b5f67d2a8116e1a00bce2611c1513b10bce"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ce792b94e03882108019ba996c1a7c4d4e09be2c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e7600f5cee5de14065f950807931d6e6d40fb2d7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-89741 (GCVE-0-2026-89741)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-09-14 12:02

Title

Revert "media: v4l2-dev: fix error handling in __video_register_device()"

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/8b998c171ed875e40…
https://git.kernel.org/stable/c/3de14b4f681a1b3c6…
https://git.kernel.org/stable/c/8027f82c0f5474ed7…
https://git.kernel.org/stable/c/2ac009a65d2385e9f…
https://git.kernel.org/stable/c/712ca1cf756de2557…
https://git.kernel.org/stable/c/aad08b5f67d2a8116…
https://git.kernel.org/stable/c/ce792b94e03882108…
https://git.kernel.org/stable/c/e7600f5cee5de1406…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e5c8e62ae551e0ad2e15412aa0c57c2856d59677 , < 8b998c171ed875e402e1fd1c5cd619e4ca05e9c1 (git) Affected: 8b451a9a46f2bfc510e6d5c2492df91647586184 , < 3de14b4f681a1b3c6d375d98d9d37a55ebb85349 (git) Affected: b6be1f5633eae200af2527e9eeb7f51be5739b0f , < 8027f82c0f5474ed72448e160ee9778051fa1f49 (git) Affected: ae7b143e05b36fc69d6571751855946cc45064c6 , < 2ac009a65d2385e9f0799eaf9d9694a29153a161 (git) Affected: 2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7 , < 712ca1cf756de2557a116e0df55791bac0c9f99e (git) Affected: 2a934fdb01db6458288fc9386d3d8ceba6dd551a , < aad08b5f67d2a8116e1a00bce2611c1513b10bce (git) Affected: 2a934fdb01db6458288fc9386d3d8ceba6dd551a , < ce792b94e03882108019ba996c1a7c4d4e09be2c (git) Affected: 2a934fdb01db6458288fc9386d3d8ceba6dd551a , < e7600f5cee5de14065f950807931d6e6d40fb2d7 (git) Affected: ee141706e701356dda41c6fed9ee18bf427c28e3 (git) Affected: 4451412739ed33a49b34624299394ee575116d0c (git) Affected: 5.10.239 , < 5.10.270 (semver) Affected: 5.15.186 , < 5.15.221 (semver) Affected: 6.1.142 , < 6.1.188 (semver) Affected: 6.6.95 , < 6.6.157 (semver) Affected: 6.12.35 , < 6.12.109 (semver) Affected: 5.4.295 , < 5.5 (semver) Affected: 6.15.4 , < 6.16 (semver)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (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: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/v4l2-core/v4l2-dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8b998c171ed875e402e1fd1c5cd619e4ca05e9c1",
              "status": "affected",
              "version": "e5c8e62ae551e0ad2e15412aa0c57c2856d59677",
              "versionType": "git"
            },
            {
              "lessThan": "3de14b4f681a1b3c6d375d98d9d37a55ebb85349",
              "status": "affected",
              "version": "8b451a9a46f2bfc510e6d5c2492df91647586184",
              "versionType": "git"
            },
            {
              "lessThan": "8027f82c0f5474ed72448e160ee9778051fa1f49",
              "status": "affected",
              "version": "b6be1f5633eae200af2527e9eeb7f51be5739b0f",
              "versionType": "git"
            },
            {
              "lessThan": "2ac009a65d2385e9f0799eaf9d9694a29153a161",
              "status": "affected",
              "version": "ae7b143e05b36fc69d6571751855946cc45064c6",
              "versionType": "git"
            },
            {
              "lessThan": "712ca1cf756de2557a116e0df55791bac0c9f99e",
              "status": "affected",
              "version": "2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7",
              "versionType": "git"
            },
            {
              "lessThan": "aad08b5f67d2a8116e1a00bce2611c1513b10bce",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "2a934fdb01db6458288fc9386d3d8ceba6dd551a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ee141706e701356dda41c6fed9ee18bf427c28e3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4451412739ed33a49b34624299394ee575116d0c",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.270",
              "status": "affected",
              "version": "5.10.239",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "5.15.186",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "6.1.142",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.157",
              "status": "affected",
              "version": "6.6.95",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.109",
              "status": "affected",
              "version": "6.12.35",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.295",
              "versionType": "semver"
            },
            {
              "lessThan": "6.16",
              "status": "affected",
              "version": "6.15.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/v4l2-core/v4l2-dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "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": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "5.10.239",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.15.186",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "6.1.142",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "6.6.95",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "6.12.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.4.295",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.15.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"media: v4l2-dev: fix error handling in __video_register_device()\"\n\nThis reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a.\n\nThe intentions of that patch were good, but it doesn\u0027t work.\n\nThe idea is that if device_register fails, you have to do a put_device\nto let the ref counter release resources.\n\nHowever, the V4L2 API says that if video_register_device() fails, then\nyou have to call video_device_release(), which kfree()s the video_device\nstruct.\n\nBut the put_device() will already have freed the struct, so you end\nup in a double-free scenario.\n\nThere is not really a good way of fixing this without breaking\nvideo_register_device() into two parts, one that initializes everything,\nand one that does the actual device_register, and then converting all\nV4L2 drivers to this new model.\n\nThat is a massive job, and it is very unlikely that device_register\nwill fail.\n\nSo rather than ending up in a double-free scenario, just revert this\npatch, and in that case we\u0027ll have a small memory leak. Which is a lot\nmore robust."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The double-free is in __video_register_device(), reached from local V4L2 registration such as USB gadget UVC configfs UDC bind (uvc_function_bind \u2192 uvc_register_video) and usbfs/sysfs re-probe of USB cameras; dummy_hcd suffices and there is no remote packet path.\nAC:L - A local attacker can retry gadget bind or device re-probe under memory/resource pressure to make device_register() fail and take the put_device() error path; success does not depend on a victim-owned race or uninfluenced layout.\nPR:L - __video_register_device() and uvc_function_bind() perform no capable() check; Android/embedded HALs routinely delegate usb_gadget configfs to non-root, and desktop usbfs/video nodes are typically uaccess/video-group, so init-namespace root is not required.\nUI:N - The attacker performs the configfs UDC bind or local re-probe and applies resource pressure themselves; no separate victim mount, file-open, or cable-plug action is required.\nS:U - The heap double-free corrupts a kmalloc\u0027d video_device or the parent object freed by vdev-\u003erelease() inside the same host kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - On device_register() failure the buggy put_device() runs v4l2_device_release() which calls vdev-\u003erelease()/kfree, then callers such as video_device_release() or gspca/uvc probe error paths free the same object again, yielding a UAF disclosure primitive.\nI:H - The same double-free of struct video_device (or parent driver objects via vdev-\u003erelease, as in UVC kref_put/uvc_delete and gspca_release) is heap corruption that can be sprayed into an arbitrary write and control-flow hijack.\nA:H - The double-free and premature v4l2_device_release() (including media_devnode_remove() on a still-NULL intf_devnode) oops or panic the kernel, and the attacker can repeat failed registration to force the crash."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:02:24.621Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8b998c171ed875e402e1fd1c5cd619e4ca05e9c1"
        },
        {
          "url": "https://git.kernel.org/stable/c/3de14b4f681a1b3c6d375d98d9d37a55ebb85349"
        },
        {
          "url": "https://git.kernel.org/stable/c/8027f82c0f5474ed72448e160ee9778051fa1f49"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ac009a65d2385e9f0799eaf9d9694a29153a161"
        },
        {
          "url": "https://git.kernel.org/stable/c/712ca1cf756de2557a116e0df55791bac0c9f99e"
        },
        {
          "url": "https://git.kernel.org/stable/c/aad08b5f67d2a8116e1a00bce2611c1513b10bce"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce792b94e03882108019ba996c1a7c4d4e09be2c"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7600f5cee5de14065f950807931d6e6d40fb2d7"
        }
      ],
      "title": "Revert \"media: v4l2-dev: fix error handling in __video_register_device()\"",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89741",
    "datePublished": "2026-09-11T19:46:47.877Z",
    "dateReserved": "2026-09-11T19:38:34.761Z",
    "dateUpdated": "2026-09-14T12:02:24.621Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.