regulator: ltc3676: don't read the write-only HRST and CLIRQ registers
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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, 6.12.113, 6.18.57, 7.2.11
- 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
Summary
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).
Timeline
- CVE published
- First seen by cve.now
Affected versions
- Linux Linux
From 37b918a034feda1b1ef404acf003812f37ab8da2 · fixed in fd376d83741118e0212f0da985889c1a98d9c827; From 37b918a034feda1b1ef404acf003812f37ab8da2 · fixed in 1fb0d58fd363b439b4faf08a16ee6ae38b575cd4; From 37b918a034feda1b1ef404acf003812f37ab8da2 · fixed in 199a62d70314d21f06a9a6faaa3ef54d0404910c; From 37b918a034feda1b1ef404acf003812f37ab8da2 · fixed in ca5d85335a8fa6e87b45629f1a07b412482cab17; From 37b918a034feda1b1ef404acf003812f37ab8da2 · fixed in 28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83
- Linux Linux
4.9
- KernelLinux
From 4.9.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.113; From 6.13.0 · fixed in 6.18.57; From 6.19.0 · fixed in 7.2.11