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CVE-2026-89901· NVD / CVE Program· CNA Linux

media: airspy: use vb2_video_unregister_device() on disconnect to fix NULL deref

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 155d0378ae0d6305cc4840583a6b42d2d0595bff, 297fee023f46d771a844520675692ea089d80d9d, 2f378dc45e685fc825d2dd08e7864666d6fcc009; 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 155d0378ae0d6305cc4840583a6b42d2d0595bff, 297fee023f46d771a844520675692ea089d80d9d, 2f378dc45e685fc825d2dd08e7864666d6fcc009; 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: airspy: use vb2_video_unregister_device() on disconnect to fix NULL deref airspy_disconnect() clears s->udev under v4l2_lock, but airspy_stop_streaming() unconditionally calls airspy_ctrl_msg() and airspy_free_stream_bufs() afterwards. If a streaming user closes the device after disconnect, stop_streaming() runs and dereferences the NULL s->udev: airspy_stop_streaming() airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0) usb_sndctrlpipe(s->udev, 0) /* NULL deref */ airspy_free_stream_bufs(s) usb_free_coherent(s->udev, ...) /* NULL deref */ The airspy driver uses vb2_fop_release() in its file_operations, so replace video_unregister_device(&s->vdev) with vb2_video_unregister_device(&s->vdev) and move it before clearing s->udev. vb2_video_unregister_device() releases the vb2 queue, which synchronously runs airspy_stop_streaming() if streaming is active, so the URBs, coherent DMA stream buffers and the hardware stop control message all execute while s->udev is still valid. vb2_video_unregister_device() locks vdev->queue->lock (vb_queue_lock) internally, and stop_streaming() locks v4l2_lock, so the previous outer mutex_lock(&s->vb_queue_lock) / mutex_lock(&s->v4l2_lock) pair around the unregister sequence would self-deadlock and has been removed. A short v4l2_lock critical section around s->udev = NULL remains so any ioctl path that still holds the file descriptor sees coherent state. Issue identified by automated review of the INV-003 series at https://sashiko.dev/

—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 10th 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%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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

    • 3.17affected
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before c9081e2655188d2d134a741aec837dc70439d505affected · git
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before 75089cea32e5055773bd13116236d08fdc98678aaffected · git
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before 155d0378ae0d6305cc4840583a6b42d2d0595bffaffected · git
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before 6e4ea90fdc6608cd5fac342e146ab6ae15d430bcaffected · git
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before a9a8c37ddda9fa3687b142be9098e1c37b8faf35affected · git
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before 297fee023f46d771a844520675692ea089d80d9daffected · git
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before c6749ac8f59cc80eb1b2d52f167fdf13e12655ccaffected · git
    • 634fe5033951b80ef4b98d8f047cb1083d29170d and later · before 2f378dc45e685fc825d2dd08e7864666d6fcc009affected · git
    • before 3.17not 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-2026-89899Sep 16, 2026 · media: cec: disable delayed work before freeing an interrupted transmit
    31Monitor
  • ← EarlierCVE-2026-89900Sep 16, 2026 · media: cec: core: Fix kmemleak due to missed rc_free_device() call
    0Monitor
  • Later →CVE-2026-89902Sep 16, 2026 · LoongArch: Avoid preempt count underflow without probe
    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 Linux155d0378ae0d6305cc4840583a6b42d2d0595bffVendor (CNA)
Linux Linux297fee023f46d771a844520675692ea089d80d9dVendor (CNA)
Linux Linux2f378dc45e685fc825d2dd08e7864666d6fcc009Vendor (CNA)
Linux Linux6e4ea90fdc6608cd5fac342e146ab6ae15d430bcVendor (CNA)
Linux Linux75089cea32e5055773bd13116236d08fdc98678aVendor (CNA)
Linux Linuxa9a8c37ddda9fa3687b142be9098e1c37b8faf35Vendor (CNA)
Linux Linuxc6749ac8f59cc80eb1b2d52f167fdf13e12655ccVendor (CNA)
Linux Linuxc9081e2655188d2d134a741aec837dc70439d505Vendor (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.

All records