Vulnerability-Lookup

GHSA-2HVG-8MMR-F5MC

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

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

media: em28xx: fix use-after-free in em28xx_v4l2_open()

em28xx_v4l2_open() reads dev->v4l2 without holding dev->lock, creating a race with em28xx_v4l2_init()'s error path and em28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct and set dev->v4l2 to NULL under dev->lock.

This race leads to two issues: - use-after-free in v4l2_fh_init() when accessing vdev->ctrl_handler, since the video_device is embedded in the freed em28xx_v4l2 struct. - NULL pointer dereference in em28xx_resolution_set() when accessing v4l2->norm, since dev->v4l2 has been set to NULL.

Fix this by moving the mutex_lock() before the dev->v4l2 read and adding a NULL check for dev->v4l2 under the lock.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31583"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: fix use-after-free in em28xx_v4l2_open()\n\nem28xx_v4l2_open() reads dev-\u003ev4l2 without holding dev-\u003elock,\ncreating a race with em28xx_v4l2_init()\u0027s error path and\nem28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct\nand set dev-\u003ev4l2 to NULL under dev-\u003elock.\n\nThis race leads to two issues:\n - use-after-free in v4l2_fh_init() when accessing vdev-\u003ectrl_handler,\n   since the video_device is embedded in the freed em28xx_v4l2 struct.\n - NULL pointer dereference in em28xx_resolution_set() when accessing\n   v4l2-\u003enorm, since dev-\u003ev4l2 has been set to NULL.\n\nFix this by moving the mutex_lock() before the dev-\u003ev4l2 read and\nadding a NULL check for dev-\u003ev4l2 under the lock.",
  "id": "GHSA-2hvg-8mmr-f5mc",
  "modified": "2026-04-24T15:32:34Z",
  "published": "2026-04-24T15:32:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31583"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b9e66437cc6123ddedac141e1b8b6fcf57d2972"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/871b8ea8ef39a6c253594649f4339378fad3d0dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31583 (GCVE-0-2026-31583)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-24 14:42

Title

media: em28xx: fix use-after-free in em28xx_v4l2_open()

Summary

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: fix use-after-free in em28xx_v4l2_open() em28xx_v4l2_open() reads dev->v4l2 without holding dev->lock, creating a race with em28xx_v4l2_init()'s error path and em28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct and set dev->v4l2 to NULL under dev->lock. This race leads to two issues: - use-after-free in v4l2_fh_init() when accessing vdev->ctrl_handler, since the video_device is embedded in the freed em28xx_v4l2 struct. - NULL pointer dereference in em28xx_resolution_set() when accessing v4l2->norm, since dev->v4l2 has been set to NULL. Fix this by moving the mutex_lock() before the dev->v4l2 read and adding a NULL check for dev->v4l2 under the lock.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/5fb2940327722b468…
	https://git.kernel.org/stable/c/871b8ea8ef39a6c25…
	https://git.kernel.org/stable/c/6b9e66437cc6123dd…
	https://git.kernel.org/stable/c/dd2b888e08d3b3d6a…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5fb2940327722b4684d2f964b54c1c90aa277324 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 871b8ea8ef39a6c253594649f4339378fad3d0dd (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6b9e66437cc6123ddedac141e1b8b6fcf57d2972 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dd2b888e08d3b3d6aacd65d76cd44fac11da750f (git)

Linux

Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0.1 , ≤ 7.0.* (semver)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/usb/em28xx/em28xx-video.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/usb/em28xx/em28xx-video.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.83",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.24",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "vulnerable": true
                },
                {
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                }
              ],
              "negate": false,
              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: em28xx: fix use-after-free in em28xx_v4l2_open()\n\nem28xx_v4l2_open() reads dev-\u003ev4l2 without holding dev-\u003elock,\ncreating a race with em28xx_v4l2_init()\u0027s error path and\nem28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct\nand set dev-\u003ev4l2 to NULL under dev-\u003elock.\n\nThis race leads to two issues:\n - use-after-free in v4l2_fh_init() when accessing vdev-\u003ectrl_handler,\n   since the video_device is embedded in the freed em28xx_v4l2 struct.\n - NULL pointer dereference in em28xx_resolution_set() when accessing\n   v4l2-\u003enorm, since dev-\u003ev4l2 has been set to NULL.\n\nFix this by moving the mutex_lock() before the dev-\u003ev4l2 read and\nadding a NULL check for dev-\u003ev4l2 under the lock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T14:42:12.923Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324"
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        },
        {
          "url": "https://git.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750f"
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      ],
      "title": "media: em28xx: fix use-after-free in em28xx_v4l2_open()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31583",
    "datePublished": "2026-04-24T14:42:12.923Z",
    "dateReserved": "2026-03-09T15:48:24.120Z",
    "dateUpdated": "2026-04-24T14:42:12.923Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-2HVG-8MMR-F5MC

CVE-2026-31583 (GCVE-0-2026-31583)

Tags

Sightings

Nomenclature