CVE-2026-2681
MEDIUM EPSS 21.7%
Published Feb 19, 20264mo ago · Modified Jun 17, 20261w ago
5.3 CVSS 3.1
Published Feb 19, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago
Description
A flaw was found in the blst cryptographic library. This out-of-bounds stack write vulnerability, specifically in the blst_sha256_bcopy assembly routine, occurs due to a missing zero-length guard. A remote attacker can exploit this by providing a zero-length salt parameter to key generation functions, such as blst_keygen_v5(), if the application exposes this functionality. Successful exploitation leads to memory corruption and immediate process termination, resulting in a denial-of-service (DoS) condition.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low
Threat Intelligence
EPSS Exploit Probability
21.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-787 Out-of-bounds Write Memory Safety
References 2
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-2681
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2440580
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.