CVE-2026-2681
Github.com/supranational/blst: blst cryptographic library: denial of service via out-of-bounds stack write in key generation
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.
INFO
Published Date :
Feb. 19, 2026, 6:58 a.m.
Last Modified :
Feb. 19, 2026, 6:58 a.m.
Remotely Exploit :
Yes !
Source :
fedora
Affected Products
The following products are affected by CVE-2026-2681
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Apply the patch for blst_sha256_bcopy.
- Update the blst library to the latest version.
- Guard against zero-length salt parameters.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2681 vulnerability anywhere in the article.