Vulnerability-Lookup

OPENSUSE-SU-2026:21873-1

Vulnerability from csaf_opensuse - Published: 2026-09-17 18:13 - Updated: 2026-09-24 17:48

Summary

Security update for opensc

Severity

Important

Notes

Title of the patch: Security update for opensc

Description of the patch: This update for opensc fixes the following issues: - CVE-2026-10275: global buffer overflow during key pair generation tests due to missing input validation (bsc#1267246). - CVE-2026-40528: stack and heap buffer overrun in the `do_key_value()` function due to missing length check allows for memory corruption via a crafted profile configuration file (bsc#1266963).

Patchnames: openSUSE-Leap-16.0-1700

CVE-2026-10275

7 (High)


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

Affected products

Recommended 5 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:opensc-0:0.26.1-160000.5.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:opensc-0:0.26.1-160000.5.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:opensc-0:0.26.1-160000.5.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:opensc-0:0.26.1-160000.5.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:opensc-bash-completion-0:0.26.1-160000.5.1.noarch	—	Vendor Fix

Threats

Impact important

CVE-2026-40528

7.8 (High)


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

Affected products

Recommended 5 products, the same list as for CVE-2026-10275

Threats

Impact important

References

10 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1266963	self
https://bugzilla.suse.com/1267246	self
https://www.suse.com/security/cve/CVE-2026-10275/	self
https://www.suse.com/security/cve/CVE-2026-40528/	self
https://www.suse.com/security/cve/CVE-2026-10275	external
https://bugzilla.suse.com/1267246	external
https://www.suse.com/security/cve/CVE-2026-40528	external
https://bugzilla.suse.com/1266963	external

JSON

To clipboard

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CVE-2026-10275 (GCVE-0-2026-10275)

Vulnerability from cvelistv5 – Published: 2026-06-01 16:45 – Updated: 2026-06-01 19:31 X_Open Source

Title

OpenSC pkcs11-tool Key Generation pkcs11-tool.c test_kpgen_certwrite buffer overflow

Summary

A flaw has been found in OpenSC up to 0.26.1. This affects the function test_kpgen_certwrite of the file src/tools/pkcs11-tool.c of the component pkcs11-tool Key Generation Module. This manipulation causes buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. It is indicated that the exploitability is difficult. The exploit has been published and may be used. Patch name: 814f745b3b6d100295f65f1935edd33d520d33ab. It is recommended to apply a patch to fix this issue.

Severity

2.3 (Low)


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

5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-01 19:31 UTC

CWE

CWE-120 - Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB mitre root Scorecard

References

9 references

URL	Tags
https://vuldb.com/vuln/367568	vdb-entrytechnical-description
https://vuldb.com/vuln/367568/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10275	third-party-advisory
https://vuldb.com/submit/825403	third-party-advisory
https://github.com/OpenSC/OpenSC/issues/3682	issue-tracking
https://github.com/OpenSC/OpenSC/pull/3684	issue-trackingpatch
https://pan.baidu.com/s/1nrZPKDz2eAcCpsaFiIRlrg	exploit
https://github.com/OpenSC/OpenSC/commit/814f745b3…	patch
https://github.com/OpenSC/OpenSC/	product

Impacted products

1 product

Vendor	Product	Version
n/a	OpenSC	Affected: 0.26.0 Affected: 0.26.1 cpe:2.3:a:opensc:opensc::::::::

Credits

Fantasy (VulDB User)

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2026-06-01T19:31:20.646Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:opensc:opensc:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "pkcs11-tool Key Generation Module"
          ],
          "product": "OpenSC",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "0.26.0"
            },
            {
              "status": "affected",
              "version": "0.26.1"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Fantasy (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw has been found in OpenSC up to 0.26.1. This affects the function test_kpgen_certwrite of the file src/tools/pkcs11-tool.c of the component pkcs11-tool Key Generation Module. This manipulation causes buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. It is indicated that the exploitability is difficult. The exploit has been published and may be used. Patch name: 814f745b3b6d100295f65f1935edd33d520d33ab. It is recommended to apply a patch to fix this issue."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 2.3,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
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        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-01T16:45:14.476Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-367568 | OpenSC pkcs11-tool Key Generation pkcs11-tool.c test_kpgen_certwrite buffer overflow",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/367568"
        },
        {
          "name": "VDB-367568 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/367568/cti"
        },
        {
          "name": "CVE-2026-10275 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-10275"
        },
        {
          "name": "Submit #825403 | OpenSC OpenSC 0.26.1 and earlier Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/825403"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/OpenSC/OpenSC/issues/3682"
        },
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/OpenSC/OpenSC/pull/3684"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://pan.baidu.com/s/1nrZPKDz2eAcCpsaFiIRlrg"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/OpenSC/OpenSC/commit/814f745b3b6d100295f65f1935edd33d520d33ab"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/OpenSC/OpenSC/"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-31T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-05-31T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-05-31T18:05:19.000Z",
          "value": "VulDB entry last update"
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      ],
      "title": "OpenSC pkcs11-tool Key Generation pkcs11-tool.c test_kpgen_certwrite buffer overflow"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "VulDB",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-40528 (GCVE-0-2026-40528)

Vulnerability from cvelistv5 – Published: 2026-05-29 13:38 – Updated: 2026-07-14 20:00 X_Open Source

Title

OpenSC < 0.27.0 Buffer Overrun in do_key_value() via profile.c

Summary

OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the do_key_value() function in src/pkcs15init/profile.c that allows attackers to corrupt memory by supplying a crafted profile configuration file. During pkcs15-init invocation, a key value entry beginning with '=' followed by more than sizeof(keybuf) characters is copied into keybuf via memcpy without a length check, causing both stack and heap buffer overruns.

Severity

1 (Low)


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

3.8 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-29 13:58 UTC

CWE

CWE-121 - Stack-based Buffer Overflow
CWE-122 - Heap-based Buffer Overflow

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/OpenSC/OpenSC/commit/0358817ec…	patch
https://www.vulncheck.com/advisories/opensc-buffe…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
OpenSC	OpenSC	Affected: 0 , < 0.27.0 (semver) Affected: 0 , < 0358817ec74aeca654f83e7709c7720b14c5db59 (git) cpe:2.3:a:opensc_project:opensc:::::::: cpe:2.3:a:opensc_project:opensc::::::::

Date Public

2026-03-30 00:00

Credits

Nicholas Carlini of Anthropic

Show details on NVD website

JSON

To clipboard

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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.

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.

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.

Action not permitted

OPENSUSE-SU-2026:21873-1

CVE-2026-10275 (GCVE-0-2026-10275)

CVE-2026-40528 (GCVE-0-2026-40528)

Tags

Sightings

Nomenclature

Related by attack behaviour