CVE-2026-99022
Received
Received - Intake
Regulator Hard Reset Bug in LTC3676 Chip
Vulnerability report for CVE-2026-99022, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-23
Last updated on: 2026-10-23
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
regulator: ltc3676: don't read the write-only HRST and CLIRQ registers
HRST (0x1e) and CLIRQ (0x1f) are write-only command strobes. Writing HRST
triggers a hard reset of the chip and writing CLIRQ clears the interrupt;
reading them returns nothing useful, and the read itself fires the command.
The result is that a plain register dump resets the board:
cat /sys/kernel/debug/regmap/2-003c/registers
walks every readable register, hits HRST, and the board reboots.
Split the callback back in two so HRST and CLIRQ stay writable but are no
longer readable. The readable range is left unchanged
(LTC3676_BUCK1 ... LTC3676_IRQSTAT).
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 37b918a034feda1b1ef404acf003812f37ab8da2 |
| Linux | Linux | 37b918a034feda1b1ef404acf003812f37ab8da2 |
| Linux | Linux | 37b918a034feda1b1ef404acf003812f37ab8da2 |
| Linux | Linux | 37b918a034feda1b1ef404acf003812f37ab8da2 |
| Linux | Linux | 37b918a034feda1b1ef404acf003812f37ab8da2 |
| Linux | Linux | 4.9 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
