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ReviewHigh

CVE-2026-80574

Linux

In the Linux kernel, the following vulnerability has been resolved: Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet Make finger2 (and also finger1) unsigned, so that if the finger index in the packet is 0 then subtracting 1 creates an array index which overflows above the existing check for FOC_MAX_FINGERS, as the existing comment says it should, instead of writing to state->fingers[-1].

CVSS
8.4
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.27
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 8.4

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet Make finger2 (and also finger1) unsigned, so that if the finger index in the packet is 0 then subtracting 1 creates an array index which overflows above the existing check for FOC_MAX_FINGERS, as the existing comment says it should, instead of writing to state->fingers[-1].

Affected product and versions

Product
Linux
Affected versions
>= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < 063b4c6a6f3fc01bca085c442000c9c100fdbd93, >= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < bb502d79acb9ac1e0a77fa8bc7b7b4729140b11f, >= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < ca92c98b806839c108995b2bbff7061515bdfb53, >= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < 81b07470cb2937ceb74b00be88151582a322433b, >= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < 6f6d5fe29efdf5001bc146fc292e6592cace93eb, >= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < 83c265bfc084d77e2171d4b67362150ab38c935b, >= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < 1842e47126816e56d30c4f856f9854fd7831066c, >= 05be1d079ec0b3691783e4384b1ada82149ff7d2 < 296736076b3fd078742651c719555a488624023a, >= 4.0
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Not available