CVE-2026-98221 KEYS: trusted: Fix tpm2_load_cmd() boundary check
A boundary check flaw in the Linux kernel's trusted keys subsystem allows local attackers to trigger memory corruption, potentially leading to code execution or privilege escalation.
- 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-2026-98221?
CVE-2026-98221 is a memory corruption vulnerability in Linux, published on 6 Oct 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:
KEYS: trusted: Fix tpm2_load_cmd() boundary check
tpm2_load_cmd() does boundary checks against the ASN.1 size i.e., payload->blob_len. Address this by passing the decoded blob size to tpm2_load_cmd(), and use it for the boundary checks.
Which versions are affected by CVE-2026-98221?
How do I fix CVE-2026-98221?
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-2026-98221 being exploited?
There is no known exploitation of CVE-2026-98221 in the wild and no public exploit code.
Sources
Also known as AZL-105987, BELL-CVE-2026-98221, DEBIAN-CVE-2026-98221, GHSA-ppw2-5gqj-39j4, UBUNTU-CVE-2026-98221.