Description (CNA)
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).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 37b918a034feda1b1ef404acf003812f37ab8da2 before fd376d83741118e0212f0da985889c1a98d9c827; affected 37b918a034feda1b1ef404acf003812f37ab8da2 before 1fb0d58fd363b439b4faf08a16ee6ae38b575cd4; affected 37b918a034feda1b1ef404acf003812f37ab8da2 before 199a62d70314d21f06a9a6faaa3ef54d0404910c; affected 37b918a034feda1b1ef404acf003812f37ab8da2 before ca5d85335a8fa6e87b45629f1a07b412482cab17; affected 37b918a034feda1b1ef404acf003812f37ab8da2 before 28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83 |
| Linux / Linux | affected 4.9; unaffected 0 before 4.9; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.2.11 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/fd376d83741118e0212f0da985889c1a98d9c827
- https://git.kernel.org/stable/c/1fb0d58fd363b439b4faf08a16ee6ae38b575cd4
- https://git.kernel.org/stable/c/199a62d70314d21f06a9a6faaa3ef54d0404910c
- https://git.kernel.org/stable/c/ca5d85335a8fa6e87b45629f1a07b412482cab17
- https://git.kernel.org/stable/c/28c2388ee24cdbefbcc458fa41ef7bffaaa1cc83