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NVD / CVE Program· CNA Linux

CVE-2026-80559: Input: sur40 - fix input device registration ordering

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: 0.17% (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 3e8ed76a4f3572e637653f0654cccdf617903231, 5c1c5227c93f18cd329dd754b4df5e0e2daece1e, 764b507be7b51787e1f577ca3bf0bab7efe81ff8; 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 3e8ed76a4f3572e637653f0654cccdf617903231, 5c1c5227c93f18cd329dd754b4df5e0e2daece1e, 764b507be7b51787e1f577ca3bf0bab7efe81ff8; 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: Input: sur40 - fix input device registration ordering In sur40_probe(), input_register_device() was previously called early before the V4L2 video device and vb2_queue components were fully initialized. If userspace opened the input device immediately upon registration, sur40_open() would trigger and start the sur40_poll() worker thread. This worker thread invokes sur40_process_video() and accesses the uninitialized vb2_queue structure, leading to a data race and potential system crash. Furthermore, if V4L2 or video registration failed after input_register_device() succeeded, the error path fell through to calling input_free_device() on a successfully registered device instead of input_unregister_device(), corrupting input core state. Move input_register_device() to the very end of sur40_probe(). This ensures the V4L2 and video queue structures are fully initialized before polling can start, and naturally resolves the error path bug since input_free_device() is now only called when input registration has not yet occurred. To maintain strict LIFO (Last-In, First-Out) teardown ordering, also move input_unregister_device() to the very beginning of sur40_disconnect(). This guarantees that the input polling worker thread is stopped before V4L2 video components or control handlers are unregistered.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 26, 2026
Updated
Aug 27, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

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

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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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

    • 4.1affected
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3daffected · git
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before dab741c9da72102a37cc1020a929051b7c45f9fbaffected · git
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before 764b507be7b51787e1f577ca3bf0bab7efe81ff8affected · git
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before 3e8ed76a4f3572e637653f0654cccdf617903231affected · git
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before 83aa12f9f2468a4fbef027c09224dc1011850fb0affected · git
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before 5c1c5227c93f18cd329dd754b4df5e0e2daece1eaffected · git
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aaaffected · git
    • e831cd251fb91d6c25352d322743db0d17ea11dd and later · before 9da976eb649c9e2f588a4499410e4d8af687925faffected · git
    • before 4.1not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.10-17.1.10-1

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-2026-80555Aug 26, 2026 · s390/vfio_ccw: Free all memory if cp_init() fails
    28Monitor
  • ← EarlierCVE-2026-80556Aug 26, 2026 · mmc: atmel-mci: Fix use-after-free in atmci_remove due to race condition
    31Monitor
  • Later →CVE-2026-80560Aug 26, 2026 · openrisc: signal: do not restore privileged SR bits on sigreturn
    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 Linux3e8ed76a4f3572e637653f0654cccdf617903231Vendor (CNA)
Linux Linux5c1c5227c93f18cd329dd754b4df5e0e2daece1eVendor (CNA)
Linux Linux764b507be7b51787e1f577ca3bf0bab7efe81ff8Vendor (CNA)
Linux Linux83aa12f9f2468a4fbef027c09224dc1011850fb0Vendor (CNA)
Linux Linux9da976eb649c9e2f588a4499410e4d8af687925fVendor (CNA)
Linux Linuxbeb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aaVendor (CNA)
Linux Linuxcd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3dVendor (CNA)
Linux Linuxdab741c9da72102a37cc1020a929051b7c45f9fbVendor (CNA)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~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.

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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

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)

—

CVSS vector

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

nvd-secondary

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✗ → ✓

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

References

Show all references (7 more)

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

All records