CVE-2024-2881

Key disclosure via unchecked Ed25519 signing faults

Published Aug 29, 2024 · Updated Aug 30, 2024

Fault injection in wolfSSL wolfCrypt 5.6.6 and earlier allows local users to disclose Ed25519 key data through Rowhammer. wc_ed25519_sign_msg uses the private key throughout signing without checking whether a Rowhammer bit flip altered its ed25519_key memory. Exploitation requires code execution on the same system, susceptible DRAM, and precise fault timing; a corrupted signature can expose key material and enable privilege escalation.

CVSS severity6.7
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Fault injection in wolfSSL wolfCrypt 5.6.6 and earlier allows local users to disclose Ed25519 key data through Rowhammer. wc_ed25519_sign_msg uses the private key throughout signing without checking whether a Rowhammer bit flip altered its ed25519_key memory. Exploitation requires code execution on the same system, susceptible DRAM, and precise fault timing; a corrupted signature can expose key material and enable privilege escalation.

The record

CVE
CVE-2024-2881
Published
Aug 29, 2024
Updated
Aug 30, 2024
Vendor
wolfSSL
Product
wolfCrypt
Classifications
CWE-1256, CWE-252, CAPEC-624, CAPEC-440, T1552.004, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 30, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.6.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

wolfSSL · wolfCryptversion=0 <=5.6.6

Published CVSS scores

6.7wolfSSLCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1256Improper Restriction of Software Interfaces to Hardware Features
CWE-252Unchecked Return Value
CAPEC-624Hardware Fault Injection
CAPEC-440Hardware Integrity Attack
T1552.004Private Keys
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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