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

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-24 14:42
VLAI?
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5fb2940327722b4684d2f964b54c1c90aa277324 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 871b8ea8ef39a6c253594649f4339378fad3d0dd (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6b9e66437cc6123ddedac141e1b8b6fcf57d2972 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dd2b888e08d3b3d6aacd65d76cd44fac11da750f (git)
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    Linux 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)
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            "drivers/media/usb/em28xx/em28xx-video.c"
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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."
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        "shortName": "Linux"
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      "title": "media: em28xx: fix use-after-free in em28xx_v4l2_open()",
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    "datePublished": "2026-04-24T14:42:12.923Z",
    "dateReserved": "2026-03-09T15:48:24.120Z",
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  • 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.
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