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CVE-2026-89887

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov7740: fix use-after-destroy in remove The ov7740_remove() function had a severe teardown order bug where it destroyed the driver's mutex before freeing the V4L2 control handler which relies on that mutex, leading to a use-after-destroy kernel panic. Furthermore, the driver explicitly called v4l2_ctrl_handler_free() and mutex_destroy() sequentially, but then called ov7740_free_controls() which invokes both of them a second time, resulting in a double-free. This patch fixes the issue by unregistering the subdevice first, and relying exclusively on ov7740_free_controls() to safely tear down the mutex and control handler in the correct order.

Severity
HIGH
CVSS score
7.8 (v3.1)
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-16 11:16:57.210000
Last modified
2026-10-19 09:18:33.657000
View original CVE JSON 
{
  "id": "CVE-2026-89887",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-16T11:16:57.210",
  "lastModified": "2026-10-19T09:18:33.657",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: i2c: ov7740: fix use-after-destroy in remove\n\nThe ov7740_remove() function had a severe teardown order bug where it\ndestroyed the driver's mutex before freeing the V4L2 control handler\nwhich relies on that mutex, leading to a use-after-destroy kernel panic.\nFurthermore, the driver explicitly called v4l2_ctrl_handler_free() and\nmutex_destroy() sequentially, but then called ov7740_free_controls()\nwhich invokes both of them a second time, resulting in a double-free.\n\nThis patch fixes the issue by unregistering the subdevice first, and\nrelying exclusively on ov7740_free_controls() to safely tear down the\nmutex and control handler in the correct order."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/media/i2c/ov7740.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "9e4693436c7dcf8584002500ce4b434b79bbf9ed",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "81e9765878d3ac8ad18e3a683332b5d6bc3a0e33",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "8a02ee6c1c4e88f3a0442bd60d3c77db9a30db5e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "7512838a19af0a284a58435292243fad21e57ff1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "25e2505866c577db2661e4d431f0907c6ec9a3b4",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "af81f35e4f429e769b784754e1aa4d7a922470ac",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "09453b467990e8ef8fe09f45a685f9a625248d33",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "39c5c4471b8d793daf868bd004e56ed420e89707",
              "lessThan": "5d1b3dea5a44124bab6c14a2d71b977dabed54e7",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/media/i2c/ov7740.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4.16",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "4.16",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.270",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.221",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.188",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.157",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.110",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.51",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.5",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/09453b467990e8ef8fe09f45a685f9a625248d33",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/25e2505866c577db2661e4d431f0907c6ec9a3b4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5d1b3dea5a44124bab6c14a2d71b977dabed54e7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7512838a19af0a284a58435292243fad21e57ff1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/81e9765878d3ac8ad18e3a683332b5d6bc3a0e33",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8a02ee6c1c4e88f3a0442bd60d3c77db9a30db5e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9e4693436c7dcf8584002500ce4b434b79bbf9ed",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/af81f35e4f429e769b784754e1aa4d7a922470ac",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}