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CVE-2026-98199

Linux: hwmon: (pmbus/core) increase number of phases and add new mask

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in272006a52cbd9c8342cead4d3eb9221ebbe8b985Also 66368f682a53f3a3842e20eebb571a59809c52c0, 1ec644c94466834f8cb6b7ba12636fd047bdfdda and 2 moreCVE List
Published6 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 272006a52cbd9c8342cead4d3eb9221ebbe8b985LinuxCVE List
  • 66368f682a53f3a3842e20eebb571a59809c52c0LinuxCVE List
  • 1ec644c94466834f8cb6b7ba12636fd047bdfddaLinuxCVE List
  • 9558fc1e042ac6b12dd63c37d2c51be4ec86d402LinuxCVE List
  • 06bd6794b5fd2163880ac3bfe973d4cc61f359f3LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 16

  • Linuxaffected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c before 272006a52cbd9c8342cead4d3eb9221ebbe8b985CVE List
  • Linuxaffected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c before b32607710a20ad983f9fe4a3051892584c0641a4CVE List
  • Linuxaffected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c before 66368f682a53f3a3842e20eebb571a59809c52c0CVE List
  • Linuxaffected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c before 1ec644c94466834f8cb6b7ba12636fd047bdfddaCVE List
  • Linuxaffected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c before 9558fc1e042ac6b12dd63c37d2c51be4ec86d402CVE List
  • Linuxaffected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c before b49f100a15b8876deccf8c59f41af92b8e25fd74CVE List
  • Linuxaffected: 2c6fcbb211494f1ff6ef384776944b9e04f4c14c before 06bd6794b5fd2163880ac3bfe973d4cc61f359f3CVE List
  • Linuxaffected: 5.10CVE List
  • Linuxunaffected: all versions before 5.10CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.54 through 6.18.*CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 7