CVE-2026-99021 regulator: of: fill in supply names in of_regulator_bulk_get_all()
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-99021?
CVE-2026-99021 is a vulnerability in Linux, published on 23 Oct 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
regulator: of: fill in supply names in of_regulator_bulk_get_all()
of_regulator_bulk_get_all() returns an array it allocated itself, and fills in only the consumer of each entry. Every other way of getting a bulk array has the supply name set, because the caller provides it, and the core expects it to be there: regulator_bulk_enable() prints it when a supply fails to enable, so a caller that hands such an array to it dereferences uninitialised memory on that path.
Copy each name into the array's own allocation, right behind the entries, so that it shares the array's lifetime and callers still have nothing extra to free. That also retires the fixed 64 byte stack buffer the names were assembled in, which is_supply_name() never bounded the copy against.
Which versions are affected by CVE-2026-99021?
How do I fix CVE-2026-99021?
Upgrade to a fixed version.
Is CVE-2026-99021 being exploited?
There is no known exploitation of CVE-2026-99021 in the wild and no public exploit code.
Sources
Also known as AZL-110870, BELL-CVE-2026-99021, DEBIAN-CVE-2026-99021, GHSA-pp3v-c45m-5x73, UBUNTU-CVE-2026-99021.