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GHSA-F4WH-V8MR-VMX9

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-28 09:31

Details

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

hwmon: (ltc4282) Fix reading the minimum alarm voltage

Coverity reports an out-of-bounds access when reading the minimum alarm voltage for the VGPIO channel. Add the missing return statement to fix the problem.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80696"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:55Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (ltc4282) Fix reading the minimum alarm voltage\n\nCoverity reports an out-of-bounds access when reading the minimum alarm\nvoltage for the VGPIO channel. Add the missing return statement to fix\nthe problem.",
  "id": "GHSA-f4wh-v8mr-vmx9",
  "modified": "2026-08-28T09:31:49Z",
  "published": "2026-08-28T09:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80696"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00feb1cce93dab948a299b69753d99c681d45a0b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08aee6d45eefc9e0b94c21bd442f47b21d64fa2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/338d655fe09b95a88788c6ac8b1651ca8db9ae51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0668ac20feaa3fff9e0c0548556368dbbd2d439"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-80696 (GCVE-0-2026-80696)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:53 – Updated: 2026-08-29 06:22

Title

hwmon: (ltc4282) Fix reading the minimum alarm voltage

Summary

In the Linux kernel, the following vulnerability has been resolved: hwmon: (ltc4282) Fix reading the minimum alarm voltage Coverity reports an out-of-bounds access when reading the minimum alarm voltage for the VGPIO channel. Add the missing return statement to fix the problem.

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/338d655fe09b95a88…
https://git.kernel.org/stable/c/08aee6d45eefc9e0b…
https://git.kernel.org/stable/c/a0668ac20feaa3fff…
https://git.kernel.org/stable/c/00feb1cce93dab948…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 , < 338d655fe09b95a88788c6ac8b1651ca8db9ae51 (git) Affected: cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 , < 08aee6d45eefc9e0b94c21bd442f47b21d64fa2c (git) Affected: cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 , < a0668ac20feaa3fff9e0c0548556368dbbd2d439 (git) Affected: cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 , < 00feb1cce93dab948a299b69753d99c681d45a0b (git)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/ltc4282.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "338d655fe09b95a88788c6ac8b1651ca8db9ae51",
              "status": "affected",
              "version": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
              "versionType": "git"
            },
            {
              "lessThan": "08aee6d45eefc9e0b94c21bd442f47b21d64fa2c",
              "status": "affected",
              "version": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
              "versionType": "git"
            },
            {
              "lessThan": "a0668ac20feaa3fff9e0c0548556368dbbd2d439",
              "status": "affected",
              "version": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
              "versionType": "git"
            },
            {
              "lessThan": "00feb1cce93dab948a299b69753d99c681d45a0b",
              "status": "affected",
              "version": "cbc29538dbf7d7400f1ffc5dd5713e6a551463a0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/ltc4282.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (ltc4282) Fix reading the minimum alarm voltage\n\nCoverity reports an out-of-bounds access when reading the minimum alarm\nvoltage for the VGPIO channel. Add the missing return statement to fix\nthe problem."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only by a local read(2) on /sys/class/hwmon/hwmonN/in2_min_alarm (sysfs -\u003e hwmon_attr_show -\u003e ltc4282_read -\u003e ltc4282_read_in); the LTC4282 I2C hwmon driver has no network, wireless, or direct physical-bus attack surface.\nAC:L - On systems with an LTC4282 bound, any read of in2_min_alarm deterministically executes the missing-return fallthrough and out-of-bounds in0_1_cache[2].en access; the attacker fully controls triggering with no race or conditions outside their control.\nPR:L - in2_min_alarm is exposed as mode 0444 with no capability checks beyond standard sysfs permissions, so any unprivileged local user on a host with LTC4282 hardware can invoke the vulnerable read path without init-namespace root or user-namespace privileges.\nUI:N - Exploitation requires only the attacker (or attacker-controlled monitoring software) to read the hwmon sysfs attribute; no separate victim action such as plugging hardware, mounting filesystems, or approving prompts is needed.\nS:U - The out-of-bounds read and conditional hardware alarm-bit clearing remain within the host kernel/driver context managing the local LTC4282; they do not cross VM, container, IOMMU, or other changed security-authority boundaries.\nC:H - The fallthrough indexes in0_1_cache[2] past the two-element array, performing an out-of-bounds read of adjacent ltc4282_state memory (energy_en/padding) that steers control flow and can return incorrect in2_min_alarm data to userspace.\nI:H - When the out-of-bounds .en byte is non-zero, the fallthrough calls __ltc4282_read_alarm() with VSOURCE_ALARM_L_MASK, clearing the VSOURCE undervoltage alarm bit on the live LTC4282 hot-swap controller and corrupting safety-critical power-rail monitoring on datacenter/telecom racks.\nA:H - Clearing VSOURCE undervoltage alarms on an LTC4282 controlling live backplane/linecard hot-swap power can mask critical rail faults, enabling undetected power events and sustained rack or linecard outages on affected server and industrial deployments."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:22:19.564Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/338d655fe09b95a88788c6ac8b1651ca8db9ae51"
        },
        {
          "url": "https://git.kernel.org/stable/c/08aee6d45eefc9e0b94c21bd442f47b21d64fa2c"
        },
        {
          "url": "https://git.kernel.org/stable/c/a0668ac20feaa3fff9e0c0548556368dbbd2d439"
        },
        {
          "url": "https://git.kernel.org/stable/c/00feb1cce93dab948a299b69753d99c681d45a0b"
        }
      ],
      "title": "hwmon: (ltc4282) Fix reading the minimum alarm voltage",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80696",
    "datePublished": "2026-08-28T06:53:01.632Z",
    "dateReserved": "2026-08-26T14:34:25.785Z",
    "dateUpdated": "2026-08-29T06:22:19.564Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-F4WH-V8MR-VMX9

CVE-2026-80696 (GCVE-0-2026-80696)

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Sightings

Nomenclature