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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98199: hwmon: (pmbus/core) increase number of phases and add new mask

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 06bd6794b5fd2163880ac3bfe973d4cc61f359f3, 1ec644c94466834f8cb6b7ba12636fd047bdfdda, 272006a52cbd9c8342cead4d3eb9221ebbe8b985; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 06bd6794b5fd2163880ac3bfe973d4cc61f359f3, 1ec644c94466834f8cb6b7ba12636fd047bdfdda, 272006a52cbd9c8342cead4d3eb9221ebbe8b985; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.10affected
    • 2c6fcbb211494f1ff6ef384776944b9e04f4c14c and later · before 272006a52cbd9c8342cead4d3eb9221ebbe8b985affected · git
    • 2c6fcbb211494f1ff6ef384776944b9e04f4c14c and later · before b32607710a20ad983f9fe4a3051892584c0641a4affected · git
    • 2c6fcbb211494f1ff6ef384776944b9e04f4c14c and later · before 66368f682a53f3a3842e20eebb571a59809c52c0affected · git
    • 2c6fcbb211494f1ff6ef384776944b9e04f4c14c and later · before 1ec644c94466834f8cb6b7ba12636fd047bdfddaaffected · git
    • 2c6fcbb211494f1ff6ef384776944b9e04f4c14c and later · before 9558fc1e042ac6b12dd63c37d2c51be4ec86d402affected · git
    • 2c6fcbb211494f1ff6ef384776944b9e04f4c14c and later · before b49f100a15b8876deccf8c59f41af92b8e25fd74affected · git
    • 2c6fcbb211494f1ff6ef384776944b9e04f4c14c and later · before 06bd6794b5fd2163880ac3bfe973d4cc61f359f3affected · git
    • before 5.10not affected · semver
    • 5.15.222 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98197Oct 6, 2026 · hwmon: (w83791d) remove fan/pwm 4-5 sysfs group on remove
    28Monitor
  • ← EarlierCVE-2026-98198Oct 6, 2026 · hwmon: (pwm-fan) Stop RPM timer before freeing tach data
    0Monitor
  • Later →CVE-2026-98200Oct 6, 2026 · hwmon: (hp-wmi-sensors) Fix use-after-free in fungible_show()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux06bd6794b5fd2163880ac3bfe973d4cc61f359f3Vendor (CNA)
Linux Linux1ec644c94466834f8cb6b7ba12636fd047bdfddaVendor (CNA)
Linux Linux272006a52cbd9c8342cead4d3eb9221ebbe8b985Vendor (CNA)
Linux Linux66368f682a53f3a3842e20eebb571a59809c52c0Vendor (CNA)
Linux Linux9558fc1e042ac6b12dd63c37d2c51be4ec86d402Vendor (CNA)
Linux Linuxb32607710a20ad983f9fe4a3051892584c0641a4Vendor (CNA)
Linux Linuxb49f100a15b8876deccf8c59f41af92b8e25fd74Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayOct 30, 2026+24 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records