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NVD / CVE Program· CNA Linux

CVE-2026-89892: media: em28xx: defer audio-only extension registration

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0da1e627f4fc9d0e947fdae90913042120878923, 1abe9524dec0fd26e9ceb8d586034d6f68dd8273, 4666197ca4f7d80cd3b0292054fe45d76be9ba04; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0da1e627f4fc9d0e947fdae90913042120878923, 1abe9524dec0fd26e9ceb8d586034d6f68dd8273, 4666197ca4f7d80cd3b0292054fe45d76be9ba04; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: defer audio-only extension registration The audio-only path registers extensions while probing the primary device. For a dual-TS board, this happens before dev_next is created. The duplicate device inherits is_audio_only and is then independently inserted into em28xx_devlist. The list is intended to contain only primary devices: extension operations reach the secondary device through dev_next. The independently linked secondary can be freed during disconnect while its list node remains reachable, resulting in a use-after-free. Defer audio-only extension registration to the module-request work item. It runs only after probing has completed construction of the optional secondary device, so only the primary is registered and extension callbacks reach the secondary through dev_next.

—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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

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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.

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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.

—

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

    • 4.17affected
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before 0da1e627f4fc9d0e947fdae90913042120878923affected · git
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before f8d7e77d9c621b42a191c67a9b37bec23dc1d555affected · git
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before 1abe9524dec0fd26e9ceb8d586034d6f68dd8273affected · git
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before 4e11c45dfdc72ab656067b1df8fcebaf52fd4715affected · git
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before d06067ee32620f272cfb80c7bc7c572ad4e74724affected · git
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before f9322ac9f862961d7f377b87ec26c8565af7e073affected · git
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before 4666197ca4f7d80cd3b0292054fe45d76be9ba04affected · git
    • 4a089668ef22c295ed4997289cc48446c849249c and later · before 95f76f51937fdfb0fc1e14cae606b1ef574a56f3affected · git
    • before 4.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-89890Sep 16, 2026 · media: go7007: defer the ALSA v4l2 put until card release
    31Monitor
  • ← EarlierCVE-2026-89891Sep 16, 2026 · media: em28xx: fix use-after-free of dev_next->devlist on disconnect
    0Monitor
  • Later →CVE-2026-89893Sep 16, 2026 · media: cx23885: cancel NetUP CI work before teardown
    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 / packageFixed versionSource
Linux Linux0da1e627f4fc9d0e947fdae90913042120878923Vendor (CNA)
Linux Linux1abe9524dec0fd26e9ceb8d586034d6f68dd8273Vendor (CNA)
Linux Linux4666197ca4f7d80cd3b0292054fe45d76be9ba04Vendor (CNA)
Linux Linux4e11c45dfdc72ab656067b1df8fcebaf52fd4715Vendor (CNA)
Linux Linux95f76f51937fdfb0fc1e14cae606b1ef574a56f3Vendor (CNA)
Linux Linuxd06067ee32620f272cfb80c7bc7c572ad4e74724Vendor (CNA)
Linux Linuxf8d7e77d9c621b42a191c67a9b37bec23dc1d555Vendor (CNA)
Linux Linuxf9322ac9f862961d7f377b87ec26c8565af7e073Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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

  1. Fix✗ → ✓

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References

Show all references (7 more)

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

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