Vulnerability-Lookup

GHSA-V4RJ-P772-HJQG

Vulnerability from github – Published: 2026-09-03 15:32 – Updated: 2026-09-04 06:31

Details

In the Linux kernel, the following vulnerability has been resolved:

Input: synaptics-rmi4 - fix F55 transmitter electrode count typo

During F55 sensor detection, the transmitter (TX) electrode count was incorrectly assigned the value of the receiver (RX) electrode count due to copy-paste typos.

This incorrect value was then propagated to the driver data and used by F54 to determine the diagnostics report size. On devices with more RX than TX electrodes, this inflated the perceived TX count, leading to incorrect report size calculations and potential out-of-bounds buffer accesses.

Fix the typos by correctly assigning the TX electrode counts.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80754"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-03T13:06:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: synaptics-rmi4 - fix F55 transmitter electrode count typo\n\nDuring F55 sensor detection, the transmitter (TX) electrode count was\nincorrectly assigned the value of the receiver (RX) electrode count\ndue to copy-paste typos.\n\nThis incorrect value was then propagated to the driver data and used\nby F54 to determine the diagnostics report size. On devices with more\nRX than TX electrodes, this inflated the perceived TX count, leading\nto incorrect report size calculations and potential out-of-bounds\nbuffer accesses.\n\nFix the typos by correctly assigning the TX electrode counts.",
  "id": "GHSA-v4rj-p772-hjqg",
  "modified": "2026-09-04T06:31:21Z",
  "published": "2026-09-03T15:32:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80754"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0739c65e799d4a93fe573ed23255a71fcfcc5438"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6058f0fea10f3caf63a435677358d1b8e9325114"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6484e00d6778fdf2209cd75940bc3902b276457f"
    },
    {
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      "url": "https://git.kernel.org/stable/c/9759502f5cd71805923457f183ae5b9533e20c7b"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b184c8337c6e12df129399007735a7fbcbbcb7b"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6d9646e77da7cab2dff7043a8e9f75e23b836bc"
    },
    {
      "type": "WEB",
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    },
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  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80754 (GCVE-0-2026-80754)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-10-16 19:26

Title

Input: synaptics-rmi4 - fix F55 transmitter electrode count typo

Summary

In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - fix F55 transmitter electrode count typo During F55 sensor detection, the transmitter (TX) electrode count was incorrectly assigned the value of the receiver (RX) electrode count due to copy-paste typos. This incorrect value was then propagated to the driver data and used by F54 to determine the diagnostics report size. On devices with more RX than TX electrodes, this inflated the perceived TX count, leading to incorrect report size calculations and potential out-of-bounds buffer accesses. Fix the typos by correctly assigning the TX electrode counts.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 19:21 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/6484e00d6778fdf22…
https://git.kernel.org/stable/c/db4e20265ebda7296…
https://git.kernel.org/stable/c/a6d9646e77da7cab2…
https://git.kernel.org/stable/c/0739c65e799d4a93f…
https://git.kernel.org/stable/c/9759502f5cd718059…
https://git.kernel.org/stable/c/9b184c8337c6e12df…
https://git.kernel.org/stable/c/a81cafe3c3c2f8494…
https://git.kernel.org/stable/c/6058f0fea10f3caf6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < 6484e00d6778fdf2209cd75940bc3902b276457f (git) Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < db4e20265ebda729610ca5cf45ca9437462c3f36 (git) Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < a6d9646e77da7cab2dff7043a8e9f75e23b836bc (git) Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < 0739c65e799d4a93fe573ed23255a71fcfcc5438 (git) Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < 9759502f5cd71805923457f183ae5b9533e20c7b (git) Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < 9b184c8337c6e12df129399007735a7fbcbbcb7b (git) Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < a81cafe3c3c2f8494063385a7b0ea7ff407bf19f (git) Affected: 6adba43fd222ea362c36296d1a6897c2e28fdc8e , < 6058f0fea10f3caf63a435677358d1b8e9325114 (git)
Linux	Linux	Affected: 4.10 Unaffected: 0 , < 4.10 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 6.6.* (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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JSON

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                "id": "CVE-2026-80754",
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              "value": "AV:L - Exploitation requires local V4L2 ioctls (STREAMON/QBUF) on the synaptics-rmi4 F54 diagnostics node (/dev/video* or /dev/v4l-touch*) that drive rmi_f54_buffer_queue() into rmi_f54_work(); the touch controller is on-board I2C/SPI/SMBus, not reachable over a network protocol.\nAC:L - On affected Synaptics hardware with more RX than TX electrodes and CONFIG_RMI4_F54 enabled, the inflated F55 TX count makes rmi_f54_get_report_size() exceed the F54-probe allocation deterministically; an attacker with device access can queue capture buffers without races or layout-dependent conditions.\nPR:L - No kernel capability is required beyond permission to open the registered VFL_TYPE_TOUCH video device and issue standard V4L2 capture ioctls; on typical laptops, kiosks, and Android builds this is granted to unprivileged local users via video/input device policy without init-namespace root.\nUI:N - No cooperative victim action is needed; the attacker opens the diagnostics node, selects a 16-bit F54 report type, and streams capture buffers to trigger the overflow without requiring another user to plug hardware, mount filesystems, or interact with the system.\nS:U - Impact is confined to host kernel heap memory within the same security boundary; this is a kmalloc buffer overflow in the input driver and does not inherently provide VM escape, IOMMU bypass, or cross-sandbox authority change.\nC:H - The inflated report_size causes rmi_f54_work() to read past the end of report_data and rmi_f54_buffer_queue() memcpy() copies that oversized payload into userspace, leaking adjacent kernel heap/slab contents that can include sensitive pointers and kernel memory.\nI:H - The device read loop writes attacker-influenced diagnostic bytes up to tens of kilobytes past the devm-allocated report_data buffer, corrupting adjacent heap objects and enabling control-flow hijacking or privilege-escalation primitives typical of kernel heap overflows.\nA:H - Corrupting adjacent slab objects via the out-of-bounds write can immediately panic or oops the kernel; the overflow is repeatable on each queued V4L2 buffer while the mis-probed F55 electrode counts remain in drv_data on affected hardware."
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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