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CVE-2026-31583

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, and 3 more
None on Exploit-DB, Metasploit or GitHub

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in 3c0283a59e36e3707c4a81f4952e362d31f876b8; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in 2cbf81f76842e46bdf25823c70e1db4044a65678; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in 38a327221f7f765e7d853b7bafe47e342441ec85; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in b5d141ea15f173f15b9f0a72965902f3428c0d92; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in 5fb2940327722b4684d2f964b54c1c90aa277324; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in 871b8ea8ef39a6c253594649f4339378fad3d0dd; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in 6b9e66437cc6123ddedac141e1b8b6fcf57d2972; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in dd2b888e08d3b3d6aacd65d76cd44fac11da750f; From 8139a4d583abad45eb987b5a99b3281b6d435b7e · fixed in a66485a934c7187ae8e36517d40615fa2e961cff

  • Linux Linux

    3.16

  • KernelLinux

    From 3.16.0 · fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.136; From 6.7.0 · fixed in 6.12.83; From 6.13.0 · fixed in 6.18.24; From 6.19.0 · fixed in 6.19.14; From 6.20.0 · fixed in 7.0.1

References 9

git.kernel.org