NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.13% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 2cbf81f76842e46bdf25823c70e1db4044a65678, 38a327221f7f765e7d853b7bafe47e342441ec85, 3c0283a59e36e3707c4a81f4952e362d31f876b8; azl3 kernel 6.6.134.1-2 on Azure Linux 3.0 6.6.137.1-1.

Low priority for now. Upgrade to Linux Linux 2cbf81f76842e46bdf25823c70e1db4044a65678, 38a327221f7f765e7d853b7bafe47e342441ec85, 3c0283a59e36e3707c4a81f4952e362d31f876b8; azl3 kernel 6.6.134.1-2 on Azure Linux 3.0 6.6.137.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

Published: Apr 24, 2026
Updated: Nov 6, 2026
EPSS: 0.1% · 2th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernelbefore 6.6.136
linux linux kernel6.12 and later · before 6.12.83
linux linux kernel6.13 and later · before 6.18.24
linux linux kernel6.19 and later · before 6.19.14
linux linux kernel7.0 and later · before 7.0.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 3.16affected
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before 3c0283a59e36e3707c4a81f4952e362d31f876b8affected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before 2cbf81f76842e46bdf25823c70e1db4044a65678affected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before 38a327221f7f765e7d853b7bafe47e342441ec85affected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before b5d141ea15f173f15b9f0a72965902f3428c0d92affected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before 5fb2940327722b4684d2f964b54c1c90aa277324affected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before 871b8ea8ef39a6c253594649f4339378fad3d0ddaffected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before 6b9e66437cc6123ddedac141e1b8b6fcf57d2972affected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before dd2b888e08d3b3d6aacd65d76cd44fac11da750faffected · git
- 8139a4d583abad45eb987b5a99b3281b6d435b7e and later · before a66485a934c7187ae8e36517d40615fa2e961cffaffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.176-1	6.1.176-1
Debian:13	linux	before 6.12.85-1	6.12.85-1
Debian:14	linux	before 6.19.14-1	6.19.14-1
openSUSE:Tumbleweed	kernel-source	before 7.0.3-1.1	7.0.3-1.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2026-31579Apr 24, 2026 · wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit
22Monitor
← EarlierCVE-2026-31580Apr 24, 2026 · bcache: fix cached_dev.sb_bio use-after-free and crash
31Monitor
Later →CVE-2026-31586Apr 24, 2026 · mm: blk-cgroup: fix use-after-free in cgwb_release_workfn()
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	2cbf81f76842e46bdf25823c70e1db4044a65678	Vendor (CNA)
Linux Linux	38a327221f7f765e7d853b7bafe47e342441ec85	Vendor (CNA)
Linux Linux	3c0283a59e36e3707c4a81f4952e362d31f876b8	Vendor (CNA)
Linux Linux	5fb2940327722b4684d2f964b54c1c90aa277324	Vendor (CNA)
Linux Linux	6b9e66437cc6123ddedac141e1b8b6fcf57d2972	Vendor (CNA)
Linux Linux	871b8ea8ef39a6c253594649f4339378fad3d0dd	Vendor (CNA)
Linux Linux	a66485a934c7187ae8e36517d40615fa2e961cff	Vendor (CNA)
Linux Linux	b5d141ea15f173f15b9f0a72965902f3428c0d92	Vendor (CNA)
Linux Linux	dd2b888e08d3b3d6aacd65d76cd44fac11da750f	Vendor (CNA)
azl3 kernel 6.6.134.1-2 on Azure Linux 3.0	6.6.137.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.176-1 · Debian:12	Package registry (OSV)
opensuse:kernel-source	7.0.3-1.1 · openSUSE:Tumbleweed	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

SSVC exploitation— → noneNov 6, 2026, 5:07 PM UTC
Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/2cbf81f76842e46bdf25823c70e1db4044a65678

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records