Out-of-bounds read in Linux kernel - CVE-2026-98221
Published: October 7, 2026
Vulnerability identifier: #VU153792
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98221
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause out-of-bounds memory reads.
The vulnerability exists due to incorrect bounds checking in tpm2_load_cmd() when loading an ASN.1-encoded TPM 2.0 trusted key blob. A local user can supply a crafted trusted key blob to cause out-of-bounds memory reads.
The boundary checks use the ASN.1-encoded payload size rather than the decoded blob size.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98221
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/114f00d738f15dd8c7318369edcdc53dd6d08763
- https://git.kernel.org/stable/c/134825dfc971fbf2b1d0f58f0b3bce8332ad0afb
- https://git.kernel.org/stable/c/3fd487c69ad3161e358c33c170bab0cf02a071b7
- https://git.kernel.org/stable/c/5afa57ea91481c6c49f194b0f5a5c4d96a4d7348
- https://git.kernel.org/stable/c/9ddbc5f4bb498aff8096a5231574858a4bffee4f
- https://git.kernel.org/stable/c/b020b447338872440142fe8a57350a483da86b7a
- https://git.kernel.org/stable/c/cc86227fea28aed86c1fb52a884560b4440da198