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

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-27 13:56
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: 8139a4d583abad45eb987b5a99b3281b6d435b7e , < b5d141ea15f173f15b9f0a72965902f3428c0d92 (git)
Affected: 8139a4d583abad45eb987b5a99b3281b6d435b7e , < 5fb2940327722b4684d2f964b54c1c90aa277324 (git)
Affected: 8139a4d583abad45eb987b5a99b3281b6d435b7e , < 871b8ea8ef39a6c253594649f4339378fad3d0dd (git)
Affected: 8139a4d583abad45eb987b5a99b3281b6d435b7e , < 6b9e66437cc6123ddedac141e1b8b6fcf57d2972 (git)
Affected: 8139a4d583abad45eb987b5a99b3281b6d435b7e , < dd2b888e08d3b3d6aacd65d76cd44fac11da750f (git)
Affected: 8139a4d583abad45eb987b5a99b3281b6d435b7e , < a66485a934c7187ae8e36517d40615fa2e961cff (git)
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    Linux Linux Affected: 3.16
Unaffected: 0 , < 3.16 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
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)
Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)
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}


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  • 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.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
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