CVE-2026-1998 (GCVE-0-2026-1998)
Vulnerability from cvelistv5 – Published: 2026-02-06 06:02 – Updated: 2026-02-12 15:09 X_Open Source
VLAI?
Title
micropython runtime.c mp_import_all memory corruption
Summary
A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue.
Severity ?
CWE
- CWE-119 - Memory Corruption
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | micropython |
Affected:
1.0
Affected: 1.1 Affected: 1.2 Affected: 1.3 Affected: 1.4 Affected: 1.5 Affected: 1.6 Affected: 1.7 Affected: 1.8 Affected: 1.9 Affected: 1.10 Affected: 1.11 Affected: 1.12 Affected: 1.13 Affected: 1.14 Affected: 1.15 Affected: 1.16 Affected: 1.17 Affected: 1.18 Affected: 1.19 Affected: 1.20 Affected: 1.21 Affected: 1.22 Affected: 1.23 Affected: 1.24 Affected: 1.25 Affected: 1.26 Affected: 1.27.0 |
Credits
Oneafter (VulDB User)
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-1998",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-12T15:08:52.250028Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-12T15:09:10.411Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "micropython",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "1.0"
},
{
"status": "affected",
"version": "1.1"
},
{
"status": "affected",
"version": "1.2"
},
{
"status": "affected",
"version": "1.3"
},
{
"status": "affected",
"version": "1.4"
},
{
"status": "affected",
"version": "1.5"
},
{
"status": "affected",
"version": "1.6"
},
{
"status": "affected",
"version": "1.7"
},
{
"status": "affected",
"version": "1.8"
},
{
"status": "affected",
"version": "1.9"
},
{
"status": "affected",
"version": "1.10"
},
{
"status": "affected",
"version": "1.11"
},
{
"status": "affected",
"version": "1.12"
},
{
"status": "affected",
"version": "1.13"
},
{
"status": "affected",
"version": "1.14"
},
{
"status": "affected",
"version": "1.15"
},
{
"status": "affected",
"version": "1.16"
},
{
"status": "affected",
"version": "1.17"
},
{
"status": "affected",
"version": "1.18"
},
{
"status": "affected",
"version": "1.19"
},
{
"status": "affected",
"version": "1.20"
},
{
"status": "affected",
"version": "1.21"
},
{
"status": "affected",
"version": "1.22"
},
{
"status": "affected",
"version": "1.23"
},
{
"status": "affected",
"version": "1.24"
},
{
"status": "affected",
"version": "1.25"
},
{
"status": "affected",
"version": "1.26"
},
{
"status": "affected",
"version": "1.27.0"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Oneafter (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue."
}
],
"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-119",
"description": "Memory Corruption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-06T06:02:08.671Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-344546 | micropython runtime.c mp_import_all memory corruption",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.344546"
},
{
"name": "VDB-344546 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.344546"
},
{
"name": "Submit #743396 | micropython 0fd0843 Memory Corruption",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.743396"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/micropython/micropython/issues/18639"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/micropython/micropython/pull/18671"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/micropython/micropython/issues/18639#issue-3780651410"
},
{
"tags": [
"patch"
],
"url": "https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6"
},
{
"tags": [
"product"
],
"url": "https://github.com/micropython/micropython/"
}
],
"tags": [
"x_open-source"
],
"timeline": [
{
"lang": "en",
"time": "2026-02-05T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-02-05T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-02-05T18:15:01.000Z",
"value": "VulDB entry last update"
}
],
"title": "micropython runtime.c mp_import_all memory corruption"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-1998",
"datePublished": "2026-02-06T06:02:08.671Z",
"dateReserved": "2026-02-05T17:09:46.272Z",
"dateUpdated": "2026-02-12T15:09:10.411Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-1998\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-02-06T07:16:12.553\",\"lastModified\":\"2026-02-06T15:14:47.703\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":4.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":3.3,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:S/C:N/I:N/A:P\",\"baseScore\":1.7,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":3.1,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-119\"}]}],\"references\":[{\"url\":\"https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/micropython/micropython/\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/micropython/micropython/issues/18639\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/micropython/micropython/issues/18639#issue-3780651410\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/micropython/micropython/pull/18671\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/?ctiid.344546\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/?id.344546\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/?submit.743396\",\"source\":\"cna@vuldb.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-1998\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-02-12T15:08:52.250028Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-02-12T15:09:00.777Z\"}}], \"cna\": {\"tags\": [\"x_open-source\"], \"title\": \"micropython runtime.c mp_import_all memory corruption\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Oneafter (VulDB User)\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"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\"}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"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\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"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\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 1.7, \"vectorString\": \"AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C\"}}], \"affected\": [{\"vendor\": \"n/a\", \"product\": \"micropython\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.0\"}, {\"status\": \"affected\", \"version\": \"1.1\"}, {\"status\": \"affected\", \"version\": \"1.2\"}, {\"status\": \"affected\", \"version\": \"1.3\"}, {\"status\": \"affected\", \"version\": \"1.4\"}, {\"status\": \"affected\", \"version\": \"1.5\"}, {\"status\": \"affected\", \"version\": \"1.6\"}, {\"status\": \"affected\", \"version\": \"1.7\"}, {\"status\": \"affected\", \"version\": \"1.8\"}, {\"status\": \"affected\", \"version\": \"1.9\"}, {\"status\": \"affected\", \"version\": \"1.10\"}, {\"status\": \"affected\", \"version\": \"1.11\"}, {\"status\": \"affected\", \"version\": \"1.12\"}, {\"status\": \"affected\", \"version\": \"1.13\"}, {\"status\": \"affected\", \"version\": \"1.14\"}, {\"status\": \"affected\", \"version\": \"1.15\"}, {\"status\": \"affected\", \"version\": \"1.16\"}, {\"status\": \"affected\", \"version\": \"1.17\"}, {\"status\": \"affected\", \"version\": \"1.18\"}, {\"status\": \"affected\", \"version\": \"1.19\"}, {\"status\": \"affected\", \"version\": \"1.20\"}, {\"status\": \"affected\", \"version\": \"1.21\"}, {\"status\": \"affected\", \"version\": \"1.22\"}, {\"status\": \"affected\", \"version\": \"1.23\"}, {\"status\": \"affected\", \"version\": \"1.24\"}, {\"status\": \"affected\", \"version\": \"1.25\"}, {\"status\": \"affected\", \"version\": \"1.26\"}, {\"status\": \"affected\", \"version\": \"1.27.0\"}]}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-02-05T00:00:00.000Z\", \"value\": \"Advisory disclosed\"}, {\"lang\": \"en\", \"time\": \"2026-02-05T01:00:00.000Z\", \"value\": \"VulDB entry created\"}, {\"lang\": \"en\", \"time\": \"2026-02-05T18:15:01.000Z\", \"value\": \"VulDB entry last update\"}], \"references\": [{\"url\": \"https://vuldb.com/?id.344546\", \"name\": \"VDB-344546 | micropython runtime.c mp_import_all memory corruption\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/?ctiid.344546\", \"name\": \"VDB-344546 | CTI Indicators (IOB, IOC, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/?submit.743396\", \"name\": \"Submit #743396 | micropython 0fd0843 Memory Corruption\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/micropython/micropython/issues/18639\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/micropython/micropython/pull/18671\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/micropython/micropython/issues/18639#issue-3780651410\", \"tags\": [\"exploit\", \"issue-tracking\"]}, {\"url\": \"https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/micropython/micropython/\", \"tags\": [\"product\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-119\", \"description\": \"Memory Corruption\"}]}], \"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-02-06T06:02:08.671Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-1998\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-12T15:09:10.411Z\", \"dateReserved\": \"2026-02-05T17:09:46.272Z\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"datePublished\": \"2026-02-06T06:02:08.671Z\", \"assignerShortName\": \"VulDB\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
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.
Loading…
Loading…