VulnerabilityPublished 24 Apr 2026Updated 6 Nov 2026

CVE-2026-31583: Linux kernel · media: em28xx: fix use-after-free in em28xx_v4l2_open()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in dd2b888e08d3b3d6aacd65d76cd44fac11da750f : update Linux kernel when convenient.

Data as of 6 Nov 2026, 15:34 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in dd2b888e08d3b3d6aacd65d76cd44fac11da750f, b5d141ea15f173f15b9f0a72965902f3428c0d92, a66485a934c7187ae8e36517d40615fa2e961cff +6

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 8139a4d583abad45eb987b5a99b3281b6d435b7e, < dd2b888e08d3b3d6aacd65d76cd44fac11da750f	Fixed in dd2b888e08d3b3d6aacd65d76cd44fac11da750f
LinuxLinux	Affected ≥ 8139a4d583abad45eb987b5a99b3281b6d435b7e, < b5d141ea15f173f15b9f0a72965902f3428c0d92	Fixed in b5d141ea15f173f15b9f0a72965902f3428c0d92
LinuxLinux	Affected ≥ 8139a4d583abad45eb987b5a99b3281b6d435b7e, < a66485a934c7187ae8e36517d40615fa2e961cff	Fixed in a66485a934c7187ae8e36517d40615fa2e961cff
LinuxLinux	Affected ≥ 8139a4d583abad45eb987b5a99b3281b6d435b7e, < 871b8ea8ef39a6c253594649f4339378fad3d0dd	Fixed in 871b8ea8ef39a6c253594649f4339378fad3d0dd
LinuxLinux	Affected ≥ 8139a4d583abad45eb987b5a99b3281b6d435b7e, < 38a327221f7f765e7d853b7bafe47e342441ec85	Fixed in 38a327221f7f765e7d853b7bafe47e342441ec85
LinuxLinux	Affected ≥ 8139a4d583abad45eb987b5a99b3281b6d435b7e, < 6b9e66437cc6123ddedac141e1b8b6fcf57d2972	Fixed in 6b9e66437cc6123ddedac141e1b8b6fcf57d2972

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.

References

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