CVE-2026-3407 (GCVE-0-2026-3407)
Vulnerability from cvelistv5 – Published: 2026-03-02 03:02 – Updated: 2026-03-02 14:43
VLAI
EPSS
VEX
Title
YosysHQ yosys BLIF File rtlil.h set heap-based overflow
Summary
A vulnerability was determined in YosysHQ yosys up to 0.62. This affects the function Yosys::RTLIL::Const::set of the file kernel/rtlil.h of the component BLIF File Parser. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Applying a patch is the recommended action to fix this issue. It appears that the issue is not reproducible all the time.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-02 14:40 UTC
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.348302 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.348302 | signaturepermissions-required |
| https://vuldb.com/?submit.763755 | third-party-advisory |
| https://github.com/YosysHQ/yosys/issues/5677 | issue-tracking |
| https://github.com/YosysHQ/yosys/pull/5680 | issue-trackingpatch |
| https://github.com/oneafter/0210/blob/main/yo2/repro | exploit |
| https://github.com/YosysHQ/yosys/pull/5681 | issue-trackingpatch |
| https://github.com/YosysHQ/yosys/ | product |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| YosysHQ | yosys |
Affected:
0.1
Affected: 0.2 Affected: 0.3 Affected: 0.4 Affected: 0.5 Affected: 0.6 Affected: 0.7 Affected: 0.8 Affected: 0.9 Affected: 0.10 Affected: 0.11 Affected: 0.12 Affected: 0.13 Affected: 0.14 Affected: 0.15 Affected: 0.16 Affected: 0.17 Affected: 0.18 Affected: 0.19 Affected: 0.20 Affected: 0.21 Affected: 0.22 Affected: 0.23 Affected: 0.24 Affected: 0.25 Affected: 0.26 Affected: 0.27 Affected: 0.28 Affected: 0.29 Affected: 0.30 Affected: 0.31 Affected: 0.32 Affected: 0.33 Affected: 0.34 Affected: 0.35 Affected: 0.36 Affected: 0.37 Affected: 0.38 Affected: 0.39 Affected: 0.40 Affected: 0.41 Affected: 0.42 Affected: 0.43 Affected: 0.44 Affected: 0.45 Affected: 0.46 Affected: 0.47 Affected: 0.48 Affected: 0.49 Affected: 0.50 Affected: 0.51 Affected: 0.52 Affected: 0.53 Affected: 0.54 Affected: 0.55 Affected: 0.56 Affected: 0.57 Affected: 0.58 Affected: 0.59 Affected: 0.60 Affected: 0.61 Affected: 0.62 |
guessed |
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"url": "https://vuldb.com/?id.348302"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/?submit.763755"
}
],
"sourceIdentifier": "cna@vuldb.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
},
{
"lang": "en",
"value": "CWE-122"
}
],
"source": "cna@vuldb.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-06-28T11:09:11+00:00",
"cve": "CVE-2026-3407",
"id": "CVE-2026-3407",
"initial_release_date": "2026-03-02T03:02:09.924000+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "yosys: YosysHQ yosys: Denial of Service via heap-based buffer overflow in BLIF File Parser",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3407.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-3407",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-02T14:40:14.679910Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-02T14:40:30.343Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"modules": [
"BLIF File Parser"
],
"product": "yosys",
"vendor": "YosysHQ",
"versions": [
{
"status": "affected",
"version": "0.1"
},
{
"status": "affected",
"version": "0.2"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "0.4"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "0.6"
},
{
"status": "affected",
"version": "0.7"
},
{
"status": "affected",
"version": "0.8"
},
{
"status": "affected",
"version": "0.9"
},
{
"status": "affected",
"version": "0.10"
},
{
"status": "affected",
"version": "0.11"
},
{
"status": "affected",
"version": "0.12"
},
{
"status": "affected",
"version": "0.13"
},
{
"status": "affected",
"version": "0.14"
},
{
"status": "affected",
"version": "0.15"
},
{
"status": "affected",
"version": "0.16"
},
{
"status": "affected",
"version": "0.17"
},
{
"status": "affected",
"version": "0.18"
},
{
"status": "affected",
"version": "0.19"
},
{
"status": "affected",
"version": "0.20"
},
{
"status": "affected",
"version": "0.21"
},
{
"status": "affected",
"version": "0.22"
},
{
"status": "affected",
"version": "0.23"
},
{
"status": "affected",
"version": "0.24"
},
{
"status": "affected",
"version": "0.25"
},
{
"status": "affected",
"version": "0.26"
},
{
"status": "affected",
"version": "0.27"
},
{
"status": "affected",
"version": "0.28"
},
{
"status": "affected",
"version": "0.29"
},
{
"status": "affected",
"version": "0.30"
},
{
"status": "affected",
"version": "0.31"
},
{
"status": "affected",
"version": "0.32"
},
{
"status": "affected",
"version": "0.33"
},
{
"status": "affected",
"version": "0.34"
},
{
"status": "affected",
"version": "0.35"
},
{
"status": "affected",
"version": "0.36"
},
{
"status": "affected",
"version": "0.37"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "0.39"
},
{
"status": "affected",
"version": "0.40"
},
{
"status": "affected",
"version": "0.41"
},
{
"status": "affected",
"version": "0.42"
},
{
"status": "affected",
"version": "0.43"
},
{
"status": "affected",
"version": "0.44"
},
{
"status": "affected",
"version": "0.45"
},
{
"status": "affected",
"version": "0.46"
},
{
"status": "affected",
"version": "0.47"
},
{
"status": "affected",
"version": "0.48"
},
{
"status": "affected",
"version": "0.49"
},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "0.57"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "0.59"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "0.61"
},
{
"status": "affected",
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}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Oneafter (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was determined in YosysHQ yosys up to 0.62. This affects the function Yosys::RTLIL::Const::set of the file kernel/rtlil.h of the component BLIF File Parser. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Applying a patch is the recommended action to fix this issue. It appears that the issue is not reproducible all the time."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 1.7,
"vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "Heap-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "Memory Corruption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-02T03:02:09.924Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-348302 | YosysHQ yosys BLIF File rtlil.h set heap-based overflow",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.348302"
},
{
"name": "VDB-348302 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.348302"
},
{
"name": "Submit #763755 | YosysHQ yosys 8bbde80 Heap-based Buffer Overflow",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.763755"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/YosysHQ/yosys/issues/5677"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/YosysHQ/yosys/pull/5680"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/oneafter/0210/blob/main/yo2/repro"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/YosysHQ/yosys/pull/5681"
},
{
"tags": [
"product"
],
"url": "https://github.com/YosysHQ/yosys/"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-03-01T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-03-01T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-03-01T08:08:34.000Z",
"value": "VulDB entry last update"
}
],
"title": "YosysHQ yosys BLIF File rtlil.h set heap-based overflow"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-3407",
"datePublished": "2026-03-02T03:02:09.924Z",
"dateReserved": "2026-03-01T07:03:11.753Z",
"dateUpdated": "2026-03-02T14:43:12.380Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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