CVE-2026-24882
Description
A flaw was found in GnuPG. This vulnerability, a stack-based buffer overflow, occurs in the tpm2daemon component when processing PKDECRYPT commands for cryptographic keys secured by a Trusted Platform Module (TPM). A local attacker could exploit this to execute unauthorized code, potentially gaining full control of the system, or disrupt its operation, leading to a denial of service.
Statement
This is an IMPORTANT vulnerability in GnuPG's tpm2daemon, affecting systems configured to use TPM-backed RSA and ECC keys. A stack-based buffer overflow can occur when processing PKDECRYPT commands, potentially leading to denial of service or arbitrary code execution. Red Hat Enterprise Linux and Fedora systems are impacted if utilizing TPM-backed keys with GnuPG.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.4 | 7.8 | 8.4 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | None | Low | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
