What is the CVSS score of CVE-2021-1104?

CVE-2021-1104 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.7%.

Is there a public PoC exploit available for CVE-2021-1104?

Yes, a public proof-of-concept exploit is available for CVE-2021-1104. Prioritise patching immediately. EPSS: 1.7%.

Instruction Set Manual CVE-2021-1104

CRITICAL

Use of Uninitialized Resource (CWE-908)

2021-08-13 psirt@nvidia.com

Denial Of Service Information Disclosure Instruction Set Manual

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Aug 13, 2021 - 16:15 nvd

CRITICAL 9.8

DescriptionNVD

The RISC-V Instruction Set Manual contains a documented ambiguity for the Machine Trap Vector Base Address (MTVEC) register that may lead to a vulnerability due to the initial state of the register not being defined, potentially leading to information disclosure, data tampering and denial of service.

AnalysisAI

The RISC-V Instruction Set Manual contains a documented ambiguity for the Machine Trap Vector Base Address (MTVEC) register that may lead to a vulnerability due to the initial state of the register. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Use of Uninitialized Resource (CWE-908), which allows attackers to access uninitialized memory causing crashes or information disclosure. The RISC-V Instruction Set Manual contains a documented ambiguity for the Machine Trap Vector Base Address (MTVEC) register that may lead to a vulnerability due to the initial state of the register not being defined, potentially leading to information disclosure, data tampering and denial of service. Affected products include: Risc-V Instruction Set Manual.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Initialize all variables, use compiler warnings for uninitialized access, use memory-safe languages.