Vulnerability-Lookup

OESA-2026-4118 (CVE-2026-75883)

Vulnerability from osv_openeuler – Published: 2026-09-25 01:28 – Updated: 2026-09-25 01:28 – Source website

Summary

ppp security update

Details

The Point-to-Point Protocol (PPP) provides a standard way to establish a network connection over a serial link. At present, this package supports IP and IPV6 and the protocols layered above them, such as TCP and UDP. The Linux port of this package also has support for IPX.

Security Fix(es):

The code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf without checking the available space and without implementing outgoing PEAP fragmentation. Thus a pppd process connecting to a server which requests PEAP authentication can be induced to corrupt global static data following the outpacket_buf array, most likely causing incorrect behavior or a crash.(CVE-2026-75883)

Severity

6.8 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-75883	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "ppp-2.5.0-6.oe2403sp1.aarch64.rpm",
          "ppp-debuginfo-2.5.0-6.oe2403sp1.aarch64.rpm",
          "ppp-debugsource-2.5.0-6.oe2403sp1.aarch64.rpm",
          "ppp-devel-2.5.0-6.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "ppp-help-2.5.0-6.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "ppp-2.5.0-6.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "ppp-2.5.0-6.oe2403sp1.x86_64.rpm",
          "ppp-debuginfo-2.5.0-6.oe2403sp1.x86_64.rpm",
          "ppp-debugsource-2.5.0-6.oe2403sp1.x86_64.rpm",
          "ppp-devel-2.5.0-6.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "ppp",
        "purl": "pkg:rpm/openEuler/ppp\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.0-6.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "The Point-to-Point Protocol (PPP) provides a standard way to establish a network connection over a serial link.  At present, this package supports IP and IPV6 and the protocols layered above them, such as TCP and UDP.  The Linux port of this package also has support for IPX.\r\n\r\nSecurity Fix(es):\n\nThe code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf\n without checking the available space and without implementing outgoing \nPEAP fragmentation. Thus a pppd process connecting to a server which \nrequests PEAP authentication can be induced to corrupt global static \ndata following the outpacket_buf array, most likely causing incorrect behavior or a crash.(CVE-2026-75883)",
  "id": "OESA-2026-4118",
  "modified": "2026-09-25T01:28:38Z",
  "published": "2026-09-25T01:28:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4118"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75883"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ppp security update",
  "upstream": [
    "CVE-2026-75883"
  ]
}

CVE-2026-75883 (GCVE-0-2026-75883)

Vulnerability from cvelistv5 – Published: 2026-09-18 15:29 – Updated: 2026-09-22 14:43

Title

PPPD buffer overflow in PEAP response code

Summary

Severity

6.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-22 14:43 UTC

CWE

CWE-122 - Heap-based buffer overflow

Assigner

redhat redhat root Scorecard

References

1 reference

URL	Tags
https://github.com/ppp-project/ppp/security/advis…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
PPP Project	ppp	Affected: 0 , ≤ 2.5.0 (semver) Unaffected: 2.5.4 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75883",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-22T14:43:07.472707Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-22T14:43:35.788Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "ppp",
          "repo": "https://github.com/interchange/interchange/",
          "vendor": "PPP Project",
          "versions": [
            {
              "lessThanOrEqual": "2.5.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "2.5.4",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "The code in \u003ccode\u003epppd\u003c/code\u003e that formats a response to a PEAP Request packet in \u003ccode\u003epeap_response()\u003c/code\u003e copies an entire TLS record of up to 16384 bytes into the fixed global buffer \u003ccode\u003eoutpacket_buf\u003c/code\u003e\n without checking the available space and without implementing outgoing \nPEAP fragmentation. Thus a pppd process connecting to a server which \nrequests PEAP authentication can be induced to corrupt global static \ndata following the \u003ccode\u003eoutpacket_buf\u003c/code\u003e array, most likely causing incorrect behavior or a crash."
            }
          ],
          "value": "The code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf\n without checking the available space and without implementing outgoing \nPEAP fragmentation. Thus a pppd process connecting to a server which \nrequests PEAP authentication can be induced to corrupt global static \ndata following the outpacket_buf array, most likely causing incorrect behavior or a crash."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122 Heap-based buffer overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T15:29:07.702Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/ppp-project/ppp/security/advisories/GHSA-rwr9-4vx8-vc35"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "PPPD buffer overflow in PEAP response code",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-75883",
    "datePublished": "2026-09-18T15:29:07.702Z",
    "dateReserved": "2026-08-18T13:09:30.492Z",
    "dateUpdated": "2026-09-22T14:43:35.788Z",
    "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.

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-2026-4118 (CVE-2026-75883)

CVE-2026-75883 (GCVE-0-2026-75883)

Tags

Sightings

Nomenclature

Related by attack behaviour