CVE-2026-98199: Linux kernel · hwmon: (pmbus/core) increase number of phases and add new mask
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:27 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
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.
References
- ubuntu.com/security/CVE-2026-98199 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98199 (opens in a new tab)
- git.kernel.org/linus/06bd6794b5fd2163880ac3bfe973d4cc61f359f3 (opens in a new tab)
- git.kernel.org/stable/c/06bd6794b5fd2163880ac3bfe973d4cc61f359f3 (opens in a new tab)
- git.kernel.org/stable/c/1ec644c94466834f8cb6b7ba12636fd047bdfdda (opens in a new tab)
- git.kernel.org/stable/c/272006a52cbd9c8342cead4d3eb9221ebbe8b985 (opens in a new tab)
- git.kernel.org/stable/c/66368f682a53f3a3842e20eebb571a59809c52c0 (opens in a new tab)
- git.kernel.org/stable/c/9558fc1e042ac6b12dd63c37d2c51be4ec86d402 (opens in a new tab)
- git.kernel.org/stable/c/b32607710a20ad983f9fe4a3051892584c0641a4 (opens in a new tab)
- git.kernel.org/stable/c/b49f100a15b8876deccf8c59f41af92b8e25fd74 (opens in a new tab)