CVE Explorer

CVE-2026-2681

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)

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:eb8840d5e024f8d2ed82b42cf8015e456f2b722fcf1470b80a738de111c7a5d4

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"collectionURL":"https://github.com/supranational/blst","defaultStatus":"unaffected","packageName":"blst","versions":[{"lessThanOrEqual":"0.3.16","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:0b86a3b6987cde6c87848f9c7b2b0629013f919d5ffe850f759e26275f6f9d71 · sha256:046e32e373f7b460… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:0b86a3b6987cde6c87848f9c7b2b0629013f919d5ffe850f759e26275f6f9d71 · sha256:046e32e373f7b460… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-787","description":"Out-of-bounds Write","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:0b86a3b6987cde6c87848f9c7b2b0629013f919d5ffe850f759e26275f6f9d71 · sha256:046e32e373f7b460… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-2681"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0b86a3b6987cde6c87848f9c7b2b0629013f919d5ffe850f759e26275f6f9d71 · sha256:046e32e373f7b460… · /containers/cna/references/0

{"name":"RHBZ#2440580","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2440580"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:0b86a3b6987cde6c87848f9c7b2b0629013f919d5ffe850f759e26275f6f9d71 · sha256:046e32e373f7b460… · /containers/cna/references/1

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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