CVE-2026-2681 — Github.com/supranational/blst: blst cryptographic library: denial of service via out-of-bounds stack write in key gene…

CVE-2026-2681

Github.com/supranational/blst: blst cryptographic library: denial of service via out-of-bounds stack write in key generation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Not supplied / Not supplied	affected 0 through 0.3.16

CWE

CWE-787

References

https://access.redhat.com/security/cve/CVE-2026-2681
https://bugzilla.redhat.com/show_bug.cgi?id=2440580

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.