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": [
{
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{
"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": {
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{
"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"
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}
],
"providerMetadata": {
"dateUpdated": "2026-03-02T14:40:30.343Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
"modules": [
"BLIF File Parser"
],
"product": "yosys",
"vendor": "YosysHQ",
"versions": [
{
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{
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{
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{
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{
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{
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},
{
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},
{
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},
{
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{
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{
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},
{
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},
{
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},
{
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{
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{
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{
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},
{
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{
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{
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{
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{
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},
{
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},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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{
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},
{
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{
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},
{
"status": "affected",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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]
}
],
"credits": [
{
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"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": [
{
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"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": {
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"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",
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}
},
{
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}
},
{
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"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"
},
{
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"patch"
],
"url": "https://github.com/YosysHQ/yosys/pull/5681"
},
{
"tags": [
"product"
],
"url": "https://github.com/YosysHQ/yosys/"
}
],
"timeline": [
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"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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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.