Vulnerability-Lookup

OESA-2026-2087 (CVE-2026-40200)

Vulnerability from osv_openeuler – Published: 2026-04-25 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

musl security update

Details

musl is an implementation of the C standard library built on top of the Linux system call API, including interfaces defined in the base language standard, POSIX, and widely agreed-upon extensions. It is lightweight, fast, simple, free, and strives to be correct in the sense of standards conformance and safety.

Security Fix(es):

An issue was discovered in musl libc 0.7.10 through 1.2.6. Stack-based memory corruption can occur during qsort of very large arrays, due to incorrectly implemented double-word primitives. The number of elements must exceed about seven million, i.e., the 32nd Leonardo number on 32-bit platforms (or the 64th Leonardo number on 64-bit platforms, which is not practical).(CVE-2026-40200)

A security flaw has been discovered in musl libc up to 1.2.6. Affected is the function iconv of the file src/locale/iconv.c of the component GB18030 4-byte Decoder. Performing a manipulation results in inefficient algorithmic complexity. The attack must be initiated from a local position. To fix this issue, it is recommended to deploy a patch.(CVE-2026-6042)

Severity

8.1 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-40200	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-6042	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "musl-debuginfo-1.2.4-6.oe2403.aarch64.rpm",
          "musl-debugsource-1.2.4-6.oe2403.aarch64.rpm",
          "musl-devel-1.2.4-6.oe2403.aarch64.rpm",
          "musl-gcc-1.2.4-6.oe2403.aarch64.rpm",
          "musl-libc-1.2.4-6.oe2403.aarch64.rpm",
          "musl-libc-static-1.2.4-6.oe2403.aarch64.rpm"
        ],
        "src": [
          "musl-1.2.4-6.oe2403.src.rpm"
        ],
        "x86_64": [
          "musl-debuginfo-1.2.4-6.oe2403.x86_64.rpm",
          "musl-debugsource-1.2.4-6.oe2403.x86_64.rpm",
          "musl-devel-1.2.4-6.oe2403.x86_64.rpm",
          "musl-gcc-1.2.4-6.oe2403.x86_64.rpm",
          "musl-libc-1.2.4-6.oe2403.x86_64.rpm",
          "musl-libc-static-1.2.4-6.oe2403.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "musl",
        "purl": "pkg:rpm/openEuler/musl\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.4-6.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "musl is an implementation of the C standard library built on top of the Linux system call API, including interfaces defined in the base language standard, POSIX, and widely agreed-upon extensions. It is lightweight, fast, simple, free, and strives to be correct in the sense of standards conformance and safety.\r\n\r\nSecurity Fix(es):\n\nAn issue was discovered in musl libc 0.7.10 through 1.2.6. Stack-based memory corruption can occur during qsort of very large arrays, due to incorrectly implemented double-word primitives. The number of elements must exceed about seven million, i.e., the 32nd Leonardo number on 32-bit platforms (or the 64th Leonardo number on 64-bit platforms, which is not practical).(CVE-2026-40200)\n\nA security flaw has been discovered in musl libc up to 1.2.6. Affected is the function iconv of the file src/locale/iconv.c of the component GB18030 4-byte Decoder. Performing a manipulation results in inefficient algorithmic complexity. The attack must be initiated from a local position. To fix this issue, it is recommended to deploy a patch.(CVE-2026-6042)",
  "id": "OESA-2026-2087",
  "modified": "2026-08-06T11:11:05Z",
  "published": "2026-04-25T11:11:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2087"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40200"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6042"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "musl security update",
  "upstream": [
    "CVE-2026-40200",
    "CVE-2026-6042"
  ]
}

CVE-2026-40200 (GCVE-0-2026-40200)

Vulnerability from cvelistv5 – Published: 2026-04-10 00:00 – Updated: 2026-04-14 14:32

Summary

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-14 14:31 UTC

CWE

CWE-670 - Always-Incorrect Control Flow Implementation

Assigner

mitre mitre root

References

3 references

URL	Tags
https://musl.libc.org/releases.html
https://www.openwall.com/lists/oss-security/2026/…
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
musl-libc	musl	Affected: 0.7.10 , ≤ 1.2.6 (semver) cpe:2.3:a:musl-libc:musl::::::::

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-40200",
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    "dateReserved": "2026-04-10T00:00:00.000Z",
    "dateUpdated": "2026-04-14T14:32:24.901Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-6042 (GCVE-0-2026-6042)

Vulnerability from cvelistv5 – Published: 2026-04-10 09:00 – Updated: 2026-04-10 15:54

Title

musl libc GB18030 4-byte Decoder iconv.c iconv algorithmic complexity

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:X

3.3 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-10 15:44 UTC

CWE

CWE-407 - Inefficient Algorithmic Complexity
CWE-404 - Denial of Service

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/vuln/356620	vdb-entrytechnical-description
https://vuldb.com/vuln/356620/cti	signaturepermissions-required
https://vuldb.com/submit/796352	third-party-advisory
https://www.openwall.com/lists/oss-security/2026/…	related
https://www.openwall.com/lists/oss-security/2026/…	patch
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
musl	libc	Affected: 1.2.0 Affected: 1.2.1 Affected: 1.2.2 Affected: 1.2.3 Affected: 1.2.4 Affected: 1.2.5 Affected: 1.2.6

Credits

0x001 (VulDB User) 0x001 (VulDB User)

Show details on NVD website

JSON

To clipboard

{
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        "providerMetadata": {
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          ],
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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.

Detection rules are retrieved from Rulezet.

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

OESA-2026-2087 (CVE-2026-40200)

CVE-2026-40200 (GCVE-0-2026-40200)

CVE-2026-6042 (GCVE-0-2026-6042)

Tags

Sightings

Nomenclature

Related by attack behaviour