hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.160, 6.12.114, 7.1.5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/core) honor vrm_version in pmbus_data2reg_vid() pmbus_data2reg_vid() hardcoded the VR11 encoding regardless of the vrm_version configured by the driver, while pmbus_reg2data_vid() already switched on it. Any driver that selects a non-VR11 VID mode and exposes a regulator (or hwmon vout setter) sent dangerously wrong codes to PMBUS_VOUT_COMMAND -- e.g. an nvidia195mv part asked for 200 mV got the VR11 clamp to 500 mV encoded as 0xB2, which the chip interprets as 1080 mV. Mirror pmbus_reg2data_vid() so writes round-trip with reads.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From 068c227056b9223fea1a759e08db2558d5cbb5ad · fixed in cd0e037130806d7714c356eccefac6e1b92dbc34; From 068c227056b9223fea1a759e08db2558d5cbb5ad · fixed in 125a5a4ad03c74ced4c2a55db45ef03505362ff9; From 068c227056b9223fea1a759e08db2558d5cbb5ad · fixed in 5bd0d47640395f8a8c34446b62d1781b88869dfa; From 068c227056b9223fea1a759e08db2558d5cbb5ad · fixed in 828cd614e2af053ca5e1d6da767bbd8a1b5cabfb
- Linux Linux
4.3
- KernelLinux
From 4.3.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.114; From 6.13.0 · fixed in 7.1.5