CVE-2026-31583media: em28xx: fix use-after-free in em28xx_v4l2_open()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8139a4d583abad45eb987b5a99b3281b6d435b7e builds before 3c0283a59e36e3707c4a81f4952e362d31f876b8; 8139a4d583abad45eb987b5a99b3281b6d435b7e builds before 2cbf81f76842e46bdf25823c70e1db4044a65678; 8139a4d583abad45eb987b5a99b3281b6d435b7e builds before 38a327221f7f765e7d853b7bafe47e342441ec85; from 8139a4d583abad45eb987b5a99b3281b6d435b7e before b5d141ea15f173f15b9f0a72965902f3428c0d92; 8139a4d583abad45eb987b5a99b3281b6d435b7e builds before 5fb2940327722b4684d2f964b54c1c90aa277324; 8139a4d583abad45eb987b5a99b3281b6d435b7e builds before 871b8ea8ef39a6c253594649f4339378fad3d0dd; 8139a4d583abad45eb987b5a99b3281b6d435b7e builds before 6b9e66437cc6123ddedac141e1b8b6fcf57d2972; from 8139a4d583abad45eb987b5a99b3281b6d435b7e before dd2b888e08d3b3d6aacd65d76cd44fac11da750f; and 1 more ranges | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | before 6.6.136; from 6.12 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1 | NVD |
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/b5d141ea15f173f15b9f0a72965902f3428c0d92patch
- https://git.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324patch
- https://git.kernel.org/stable/c/871b8ea8ef39a6c253594649f4339378fad3d0ddpatch
- https://git.kernel.org/stable/c/6b9e66437cc6123ddedac141e1b8b6fcf57d2972patch
- https://git.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750fpatch
- https://git.kernel.org/stable/c/a66485a934c7187ae8e36517d40615fa2e961cffpatch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.