CVE-2026-80745: regulator: fp9931: Fix VPOS/VNEG voltage selector table

CVE-2026-80745: regulator: fp9931: Fix VPOS/VNEG voltage selector table

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

regulator: fp9931: Fix VPOS/VNEG voltage selector table

The VPOSNEG_table[] mapping does not match the FP9931 datasheet.

The datasheet defines the VPOS/VNEG voltage mapping as:

  00h-04h ->  7.04V (-7.04V)
  05h     ->  7.26V (-7.26V)
  06h     ->  7.49V (-7.49V)
  ...
  28h-3Fh -> 15.06V (-15.06V)

However, VPOSNEG_table[] has two issues:

1. Selector 0x00~0x04 should all map to 7.04V (5 entries), but the
   table has 6 entries of 7.04V, causing all subsequent entries to be
   shifted by one position.

2. Selectors 0x29~0x3F should all clamp to 15.06V (23 entries), but
   the table has only 41 entries. Any selector value above 0x28
   would result in an out-of-bounds table access.

Fix both issues by removing the duplicate 7.04V entry and appending
the missing 23 clamped 15.06V entries, bringing the table to the
correct size of 64 entries (0x00~0x3F).

The Linux kernel CVE team has assigned CVE-2026-80745 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.19 with commit 12d821bd13d42e6de3ecb1c13918b1f06a3ee213 and fixed in 7.1.10 with commit 92a9594053831bf4c5886519688e155912befaee
	Issue introduced in 6.19 with commit 12d821bd13d42e6de3ecb1c13918b1f06a3ee213 and fixed in 7.2 with commit 66694b5f90f3876fccb87bbd02b453cdc33b3ae4

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-80745
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/regulator/fp9931.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/92a9594053831bf4c5886519688e155912befaee
	https://git.kernel.org/stable/c/66694b5f90f3876fccb87bbd02b453cdc33b3ae4