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NVD / CVE Program· CNA Linux

CVE-2026-80566: Input: hynitron_cstxxx - validate touch count and finger IDs

—No exploit Fix available

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: 0.15% (FIRST EPSS).
  • Fixed version: Linux Linux 27f380ef0e1d3de3cde114e02d33f9320ce3a5a6, 387829ee60de26c7c073ed4e27ecfab2b75d4c74, 38e7d5c1ade04b99c70da0298ca296ee62bc99c0; 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 27f380ef0e1d3de3cde114e02d33f9320ce3a5a6, 387829ee60de26c7c073ed4e27ecfab2b75d4c74, 38e7d5c1ade04b99c70da0298ca296ee62bc99c0; 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: hynitron_cstxxx - validate touch count and finger IDs The driver allocates max_touch_num input slots, which are indexed from zero through max_touch_num - 1. The current check allows a finger ID equal to max_touch_num to reach cst3xx_report_contact(). While the input core ignores out-of-range slot indices, reporting touch data without a valid slot change corrupts the touch state of the previously active slot. The touch count is read from the controller's report and is used to index the fixed-size report buffer without first checking its range. Reject counts larger than the supported number of touch slots before checking the trailing byte or parsing touch data. Reject finger IDs equal to or greater than max_touch_num, and return immediately when an invalid finger ID is encountered so that corrupt touch frames are discarded instead of reporting partial contact state. The V821 Avaota F1 board configures the vendor driver with one touch slot, so finger ID 1 is already invalid on that device.

Published
Aug 26, 2026
Updated
Aug 26, 2026
EPSS
0.1% · 4th 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 · 0.1%

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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.

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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

    • 6.2affected
    • 66603243f5283f7f28c795f09e7c2167233df0bd and later · before ec61ca4e310665816a639cb2e46cd9b3af0a9beeaffected · git
    • 66603243f5283f7f28c795f09e7c2167233df0bd and later · before 387829ee60de26c7c073ed4e27ecfab2b75d4c74affected · git
    • 66603243f5283f7f28c795f09e7c2167233df0bd and later · before 38e7d5c1ade04b99c70da0298ca296ee62bc99c0affected · git
    • 66603243f5283f7f28c795f09e7c2167233df0bd and later · before 51c5503554c87e4de4035468bebf186205391ce9affected · git
    • 66603243f5283f7f28c795f09e7c2167233df0bd and later · before 27f380ef0e1d3de3cde114e02d33f9320ce3a5a6affected · git
    • before 6.2not affected · semver
    • 6.6.153 and later · up to and including 6.6.*not affected · semver
    • 6.12.105 and later · up to and including 6.12.*not affected · semver
    • 6.18.46 and later · up to and including 6.18.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
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

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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-2026-80564Aug 26, 2026 · gve: fix NULL dereference due to missing ptp adjfine
    0Monitor
  • ← EarlierCVE-2026-80565Aug 26, 2026 · crypto: qce - fix error path in devm_qce_register_algs
    31Monitor
  • Later →CVE-2026-80567Aug 26, 2026 · Input: synaptics-rmi4 - propagate F54 worker errors to V4L2 queue
    0Monitor

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 Linux27f380ef0e1d3de3cde114e02d33f9320ce3a5a6Vendor (CNA)
Linux Linux387829ee60de26c7c073ed4e27ecfab2b75d4c74Vendor (CNA)
Linux Linux38e7d5c1ade04b99c70da0298ca296ee62bc99c0Vendor (CNA)
Linux Linux51c5503554c87e4de4035468bebf186205391ce9Vendor (CNA)
Linux Linuxec61ca4e310665816a639cb2e46cd9b3af0a9beeVendor (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:linux6.12.105-1 · Debian:13Package 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (4 more)

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

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