CVE-2026-80745 regulator: fp9931: Fix VPOS/VNEG voltage selector table
An out-of-bounds read in the FP9931 regulator driver can cause a kernel crash or undefined behavior due to incorrect voltage selector table indexing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80745?
CVE-2026-80745 is a high-severity memory corruption vulnerability in Linux, published on 3 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Which versions are affected by CVE-2026-80745?
How do I fix CVE-2026-80745?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80745 being exploited?
There is no known exploitation of CVE-2026-80745 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-80745, GHSA-q96v-q649-9jp5, UBUNTU-CVE-2026-80745.