CVE-2026-98199: Linux kernel · hwmon: (pmbus/core) increase number of phases and add new mask
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in b32607710a20ad983f9fe4a3051892584c0641a4 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in b32607710a20ad983f9fe4a3051892584c0641a4, b49f100a15b8876deccf8c59f41af92b8e25fd74, 272006a52cbd9c8342cead4d3eb9221ebbe8b985 +4
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
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
This vulnerability has been fixed in the Linux kernel. Users should update to a kernel version that includes the fix identified by the listed commit hashes. No additional mitigation is required once the patch is applied.
Description
A vulnerability in the Linux kernel's hwmon subsystem (pmbus/core) involved an insufficient number of phases supported, which could lead to out-of-bounds writes when probing certain hardware monitoring chips. The issue was fixed by increasing the number of supported phases to 16 and adding a new mask for controlling the output voltage source. This patch addresses potential memory corruption caused by drivers supporting more phases than previously accounted for.
References
- git.kernel.org/stable/c/272006a52cbd9c8342cead4d3eb9221ebbe8b985 (opens in a new tab)
- git.kernel.org/stable/c/b32607710a20ad983f9fe4a3051892584c0641a4 (opens in a new tab)
- git.kernel.org/stable/c/66368f682a53f3a3842e20eebb571a59809c52c0 (opens in a new tab)
- git.kernel.org/stable/c/1ec644c94466834f8cb6b7ba12636fd047bdfdda (opens in a new tab)
- git.kernel.org/stable/c/9558fc1e042ac6b12dd63c37d2c51be4ec86d402 (opens in a new tab)
- git.kernel.org/stable/c/b49f100a15b8876deccf8c59f41af92b8e25fd74 (opens in a new tab)
- git.kernel.org/stable/c/06bd6794b5fd2163880ac3bfe973d4cc61f359f3 (opens in a new tab)