Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8139a4d583abad45eb987b5a99b3281b6d435b7e to < 3c0283a59e36e3707c4a81f4952e362d31f876b8affected8139a4d583abad45eb987b5a99b3281b6d435b7e to < 2cbf81f76842e46bdf25823c70e1db4044a65678affected8139a4d583abad45eb987b5a99b3281b6d435b7e to < 38a327221f7f765e7d853b7bafe47e342441ec85affected8139a4d583abad45eb987b5a99b3281b6d435b7e to < b5d141ea15f173f15b9f0a72965902f3428c0d92affected8139a4d583abad45eb987b5a99b3281b6d435b7e to < 5fb2940327722b4684d2f964b54c1c90aa277324affected8139a4d583abad45eb987b5a99b3281b6d435b7e to < 871b8ea8ef39a6c253594649f4339378fad3d0ddaffected8139a4d583abad45eb987b5a99b3281b6d435b7e to < 6b9e66437cc6123ddedac141e1b8b6fcf57d2972affected8139a4d583abad45eb987b5a99b3281b6d435b7e to < dd2b888e08d3b3d6aacd65d76cd44fac11da750faffected8139a4d583abad45eb987b5a99b3281b6d435b7e to < a66485a934c7187ae8e36517d40615fa2e961cffaffected
Linux Linux
Default version status: affected
3.16affected0 to < 3.16unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.136 to ≤ 6.6.*unaffected6.12.83 to ≤ 6.12.*unaffected6.18.24 to ≤ 6.18.*unaffected6.19.14 to ≤ 6.19.*unaffected7.0.1 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3c0283a59e36e3707c4a81f4952e362d31f876b8 ↗
- https://git.kernel.org/stable/c/2cbf81f76842e46bdf25823c70e1db4044a65678 ↗
- https://git.kernel.org/stable/c/38a327221f7f765e7d853b7bafe47e342441ec85 ↗
- https://git.kernel.org/stable/c/b5d141ea15f173f15b9f0a72965902f3428c0d92 ↗
- https://git.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324 ↗
- https://git.kernel.org/stable/c/871b8ea8ef39a6c253594649f4339378fad3d0dd ↗
- https://git.kernel.org/stable/c/6b9e66437cc6123ddedac141e1b8b6fcf57d2972 ↗
- https://git.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750f ↗
- https://git.kernel.org/stable/c/a66485a934c7187ae8e36517d40615fa2e961cff ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗