CVE-2026-55321
Received Received - Intake

Heap Buffer Overflow in Keymint ASN1 Parser

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: Google Devices

Description
In parse_prime256v1 of keymint_asn1.c, there is a possible Heap Buffer Overflow due to a logic error in the code. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-55321
EUVD
EUVD-2026-122707

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a Heap Buffer Overflow vulnerability in the parse_prime256v1 function of keymint_asn1.c. It occurs due to a logic error in the code, which could allow an attacker to write beyond the intended memory bounds. Exploitation requires execution privileges and could lead to local privilege escalation.

Impact Analysis

If exploited, this vulnerability could allow an attacker with existing execution privileges to escalate their privileges locally. This might enable them to gain unauthorized access to sensitive data or perform actions beyond their intended permissions.

Mitigation Strategies

Apply the latest security patches or updates from the vendor if available. Monitor official advisories for patches specific to the keymint_asn1.c component. Restrict execution privileges where possible to limit potential impact.

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