Vulnerability-Lookup

ubuntu-cve-2026-1998

Vulnerability from osv_ubuntu

Published

2026-02-06 07:16

Modified

2026-05-20 15:24

Summary

Details

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

3.3 (Low)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

1.9 (Low)


                    
                      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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-1998	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-1998	REPORT
	https://github.com/micropython/micropython/issues/18639	REPORT
	https://github.com/micropython/micropython/pull/18671	REPORT
	https://github.com/dpgeorge/micropython/commit/57…	REPORT
	https://github.com/micropython/micropython/	REPORT
	https://github.com/micropython/micropython/issues…	REPORT
	https://vuldb.com/?ctiid.344546	REPORT
	https://vuldb.com/?id.344546	REPORT
	https://vuldb.com/?submit.743396	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "micropython",
            "binary_version": "1.12-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "micropython",
        "purl": "pkg:deb/ubuntu/micropython@1.12-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12-1",
        "1.12-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "micropython",
            "binary_version": "1.17+ds-1.1ubuntu2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "micropython",
        "purl": "pkg:deb/ubuntu/micropython@1.17+ds-1.1ubuntu2+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.17+ds-1ubuntu1",
        "1.17+ds-1.1",
        "1.17+ds-1.1ubuntu2",
        "1.17+ds-1.1ubuntu2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "micropython",
            "binary_version": "1.22.1+ds-1ubuntu0.24.04.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "micropython",
        "purl": "pkg:deb/ubuntu/micropython@1.22.1+ds-1ubuntu0.24.04.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.19.1+ds-1",
        "1.22.1+ds-1",
        "1.22.1+ds-1build1",
        "1.22.1+ds-1build2",
        "1.22.1+ds-1ubuntu0.24.04.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "micropython",
            "binary_version": "1.25.0+ds-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "micropython",
        "purl": "pkg:deb/ubuntu/micropython@1.25.0+ds-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.24.1+ds-1",
        "1.25.0+ds-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "micropython",
            "binary_version": "1.26.1+ds-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "micropython",
        "purl": "pkg:deb/ubuntu/micropython@1.26.1+ds-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.25.0+ds-1",
        "1.26.1+ds-1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-1998",
  "modified": "2026-05-20T15:24:27Z",
  "published": "2026-02-06T07:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-1998"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-1998"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/micropython/micropython/issues/18639"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/micropython/micropython/pull/18671"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/micropython/micropython/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/micropython/micropython/issues/18639#issue-3780651410"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?ctiid.344546"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?id.344546"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?submit.743396"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-1998"
  ]
}

CVE-2026-1998 (GCVE-0-2026-1998)

Vulnerability from cvelistv5 – Published: 2026-02-06 06:02 – Updated: 2026-02-23 09:22 X_Open Source

Title

micropython runtime.c mp_import_all memory corruption

Summary

Severity

4.8 (Medium)


                        
                          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

3.3 (Low)


                        
                          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

3.3 (Low)


                        
                          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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-119 - Memory Corruption

Assigner

VulDB

References

8 references

URL	Tags
https://vuldb.com/?id.344546	vdb-entrytechnical-description
https://vuldb.com/?ctiid.344546	signaturepermissions-required
https://vuldb.com/?submit.743396	third-party-advisory
https://github.com/micropython/micropython/issues/18639	issue-tracking
https://github.com/micropython/micropython/pull/18671	issue-tracking
https://github.com/micropython/micropython/issues…	exploitissue-tracking
https://github.com/dpgeorge/micropython/commit/57…	patch
https://github.com/micropython/micropython/	product

Impacted products

1 product

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 cpe:2.3:a:micropython:micropython::::::::

Credits

Oneafter (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "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": [
        {
          "cpes": [
            "cpe:2.3:a:micropython:micropython:*:*:*:*:*:*:*:*"
          ],
          "product": "micropython",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "1.0"
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              "version": "1.1"
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              "status": "affected",
              "version": "1.2"
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              "status": "affected",
              "version": "1.3"
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            {
              "status": "affected",
              "version": "1.4"
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              "version": "1.5"
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            {
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            },
            {
              "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": {
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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": {
            "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"
          }
        },
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          "cvssV3_0": {
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            "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"
          }
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      "problemTypes": [
        {
          "descriptions": [
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              "description": "Memory Corruption",
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              "type": "CWE"
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            "technical-description"
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          "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"
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          "url": "https://github.com/micropython/micropython/issues/18639#issue-3780651410"
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          "tags": [
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        },
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          "tags": [
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      "timeline": [
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          "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": "2026-02-18T01:03:36.000Z",
          "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": "2026-02-23T09:22:01.000Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2026-1998

Vulnerability from osv_ubuntu

CVE-2026-1998 (GCVE-0-2026-1998)

Tags

Sightings

Nomenclature