CVE-2026-98199 (GCVE-0-2026-98199)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:44 – Updated: 2026-10-06 08:44
VLAI
Title
hwmon: (pmbus/core) increase number of phases and add new mask
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/core) increase number of phases and add new mask Increase the number of phases to 16 as a new upcoming device supports such a number. While at it, add a new mask for controlling the source of the output voltage. Note (groeck): This patch was meant to prepare for support of MAX20826 and compatible devices, which support more than 10 phases per page. However, Sashiko reports that the mp2975 driver already supports up to 14 phases, and the mp2856 driver supports up to 12 phases. This already has the potential for out-of-bounds writes when probing the affected chips, making this patch a bug fix.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c , < 272006a52cbd9c8342cead4d3eb9221ebbe8b985 (git)
Affected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c , < b32607710a20ad983f9fe4a3051892584c0641a4 (git)
Affected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c , < 66368f682a53f3a3842e20eebb571a59809c52c0 (git)
Affected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c , < 1ec644c94466834f8cb6b7ba12636fd047bdfdda (git)
Affected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c , < 9558fc1e042ac6b12dd63c37d2c51be4ec86d402 (git)
Affected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c , < b49f100a15b8876deccf8c59f41af92b8e25fd74 (git)
Affected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c , < 06bd6794b5fd2163880ac3bfe973d4cc61f359f3 (git)
Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.15.222 , ≤ 5.15.* (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/core) increase number of phases and add new mask\n\nIncrease the number of phases to 16 as a new upcoming device supports\nsuch a number.\n\nWhile at it, add a new mask for controlling the source of the output\nvoltage.\n\nNote (groeck):\n\nThis patch was meant to prepare for support of MAX20826 and compatible\ndevices, which support more than 10 phases per page. However, Sashiko\nreports that the mp2975 driver already supports up to 14 phases, and the\nmp2856 driver supports up to 12 phases. This already has the potential for\nout-of-bounds writes when probing the affected chips, making this patch a\nbug fix."
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/core) increase number of phases and add new mask\n\nIncrease the number of phases to 16 as a new upcoming device supports\nsuch a number.\n\nWhile at it, add a new mask for controlling the source of the output\nvoltage.\n\nNote (groeck):\n\nThis patch was meant to prepare for support of MAX20826 and compatible\ndevices, which support more than 10 phases per page. However, Sashiko\nreports that the mp2975 driver already supports up to 14 phases, and the\nmp2856 driver supports up to 12 phases. This already has the potential for\nout-of-bounds writes when probing the affected chips, making this patch a\nbug fix."
          }
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        "id": "CVE-2026-98199",
        "lastModified": "2026-10-06T09:18:05.597",
        "metrics": {},
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    "redhat_vex": {
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      "current_release_date": "2026-10-08T23:35:36+00:00",
      "cve": "CVE-2026-98199",
      "id": "CVE-2026-98199",
      "initial_release_date": "2026-10-06T00:00:00+00:00",
      "product_status:known_not_affected": "277",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: hwmon: (pmbus/core) increase number of phases and add new mask",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98199.json",
      "version": "3"
    },
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      "current_release_date": "2026-10-08T16:50:50Z",
      "cve": "CVE-2026-98199",
      "id": "CVE-2026-98199",
      "initial_release_date": "2026-10-08T16:50:50Z",
      "product_status:known_affected": "158",
      "product_status:known_not_affected": "189",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98199",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98199.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.