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CVE-2026-99022

UnknownEPSS 0.17%

Last modified

CVE-2026-99022 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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).

Metrics

EPSS Probability
0.17%

6.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 37b918a034feda1b1ef404acf003812f37ab8da2, < 4cc1e849bb7dd8deb37f6a51e1aaf725e2016595; >= 37b918a034feda1b1ef404acf003812f37ab8da2, < 0893de2397d85547d4b88379044aa541b07b56af; >= 37b918a034feda1b1ef404acf003812f37ab8da2, < f8b0ccdcf3ca7cf6e4c2c400e80f81a727f768c7; >= 37b918a034feda1b1ef404acf003812f37ab8da2, < fd376d83741118e0212f0da985889c1a98d9c827; >= 37b918a034feda1b1ef404acf003812f37ab8da2, < 1fb0d58fd363b439b4faf08a16ee6ae38b575cd4; >= 37b918a034feda1b1ef404acf003812f37ab8da2, < 199a62d70314d21f06a9a6faaa3ef54d0404910c; >= 37b918a034feda1b1ef404acf003812f37ab8da2, < ca5d85335a8fa6e87b45629f1a07b412482cab17; >= 37b918a034feda1b1ef404acf003812f37ab8da2, < 28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83
LinuxLinux4.9

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-99022?
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).
How severe is CVE-2026-99022?
Severity scoring for CVE-2026-99022 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-99022?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST