CVE-2026-99021
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.
Affected versions
Linux kernel versions
6.1.110,
6.2
and later are affected. Fixed in
6.18.57,
7.2.11,
7.3
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-99021?
CVE-2026-99021 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.1.110 onward and has been patched in 6.18.57, 7.2.11 and 7.3. CVE-2026-99021 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-99021?
Yes. CVE-2026-99021 has been patched. Fixed versions include 6.18.57, 7.2.11 and 7.3. If you are running Linux kernel 6.1.110 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-99021 actively exploited?
No. CVE-2026-99021 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.