Vulnerability-Lookup

ubuntu-cve-2026-21895

Vulnerability from osv_ubuntu

Published

2026-01-08 14:15

Modified

2026-03-17 05:25

Summary

Details

The rsa crate is an RSA implementation written in rust. Prior to version 0.9.10, when creating a RSA private key from its components, the construction panics instead of returning an error when one of the primes is 1. Version 0.9.10 fixes the issue.

Severity

2.7 (Low)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

5.3 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-21895	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-21895	REPORT
	https://github.com/RustCrypto/RSA/security/adviso…	REPORT
	https://github.com/RustCrypto/RSA/commit/2926c91b…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librust-rsa-dev",
            "binary_version": "0.9.2-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rust-rsa",
        "purl": "pkg:deb/ubuntu/rust-rsa@0.9.2-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.2-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librust-rsa-dev",
            "binary_version": "0.9.7-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "rust-rsa",
        "purl": "pkg:deb/ubuntu/rust-rsa@0.9.7-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.7-1"
      ]
    }
  ],
  "aliases": [],
  "details": "The `rsa` crate is an RSA implementation written in rust. Prior to version 0.9.10, when creating a RSA private key from its components, the construction panics instead of returning an error when one of the primes is `1`. Version 0.9.10 fixes the issue.",
  "id": "UBUNTU-CVE-2026-21895",
  "modified": "2026-03-17T05:25:13Z",
  "published": "2026-01-08T14:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-21895"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-21895"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/RustCrypto/RSA/security/advisories/GHSA-9c48-w39g-hm26"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/RustCrypto/RSA/commit/2926c91bef7cb14a7ccd42220a698cf4b1b692f7"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-21895"
  ]
}

CVE-2026-21895 (GCVE-0-2026-21895)

Vulnerability from cvelistv5 – Published: 2026-01-08 14:06 – Updated: 2026-01-08 15:55

Title

rsa crate has potential panic on a prime being equal to 1

Summary

The `rsa` crate is an RSA implementation written in rust. Prior to version 0.9.10, when creating a RSA private key from its components, the construction panics instead of returning an error when one of the primes is `1`. Version 0.9.10 fixes the issue.

Severity

2.7 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-703 - Improper Check or Handling of Exceptional Conditions

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/RustCrypto/RSA/security/adviso…	x_refsource_CONFIRM
https://github.com/RustCrypto/RSA/commit/2926c91b…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
RustCrypto	RSA	Affected: < 0.9.10

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21895",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T14:52:10.453165Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-08T15:55:13.043Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "RSA",
          "vendor": "RustCrypto",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.9.10"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The `rsa` crate is an RSA implementation written in rust. Prior to version 0.9.10, when creating a RSA private key from its components, the construction panics instead of returning an error when one of the primes is `1`. Version 0.9.10 fixes the issue."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 2.7,
            "baseSeverity": "LOW",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-703",
              "description": "CWE-703: Improper Check or Handling of Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-08T14:06:29.288Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/RustCrypto/RSA/security/advisories/GHSA-9c48-w39g-hm26",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/RustCrypto/RSA/security/advisories/GHSA-9c48-w39g-hm26"
        },
        {
          "name": "https://github.com/RustCrypto/RSA/commit/2926c91bef7cb14a7ccd42220a698cf4b1b692f7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/RustCrypto/RSA/commit/2926c91bef7cb14a7ccd42220a698cf4b1b692f7"
        }
      ],
      "source": {
        "advisory": "GHSA-9c48-w39g-hm26",
        "discovery": "UNKNOWN"
      },
      "title": "rsa crate has potential panic on a prime being equal to 1"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-21895",
    "datePublished": "2026-01-08T14:06:29.288Z",
    "dateReserved": "2026-01-05T17:24:36.929Z",
    "dateUpdated": "2026-01-08T15:55:13.043Z",
    "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-2026-21895

Vulnerability from osv_ubuntu

CVE-2026-21895 (GCVE-0-2026-21895)

Tags

Sightings

Nomenclature