CVE-2026-43200 (GCVE-0-2026-43200)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:19
VLAI
Title
PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions struct configfs_item_operations callbacks are defined like the following: int (*allow_link)(struct config_item *src, struct config_item *target); void (*drop_link)(struct config_item *src, struct config_item *target); While pci_primary_epc_epf_link() and pci_secondary_epc_epf_link() specify the parameters in the correct order, pci_primary_epc_epf_unlink() and pci_secondary_epc_epf_unlink() specify the parameters in the wrong order, leading to the below kernel crash when using the unlink command in configfs: Unable to handle kernel paging request at virtual address 0000000300000857 Mem abort info: ... pc : string+0x54/0x14c lr : vsnprintf+0x280/0x6e8 ... string+0x54/0x14c vsnprintf+0x280/0x6e8 vprintk_default+0x38/0x4c vprintk+0xc4/0xe0 pci_epf_unbind+0xdc/0x108 configfs_unlink+0xe0/0x208+0x44/0x74 vfs_unlink+0x120/0x29c __arm64_sys_unlinkat+0x3c/0x90 invoke_syscall+0x48/0x134 do_el0_svc+0x1c/0x30prop.0+0xd0/0xf0 [mani: cced stable, changed commit message as per https://lore.kernel.org/linux-pci/aV9joi3jF1R6ca02@ryzen]
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e85a2d7837622bd99c96f5bbc7f972da90c285a2 , < 58686bf62cb38b92e4b28408162a5703775b4d12 (git)
Affected: e85a2d7837622bd99c96f5bbc7f972da90c285a2 , < 1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46 (git)
Affected: e85a2d7837622bd99c96f5bbc7f972da90c285a2 , < 142b1bba3299264b76ed8ef53cd93b2b2af65d6c (git)
Affected: e85a2d7837622bd99c96f5bbc7f972da90c285a2 , < 339191811e6fc4559c4008c5af7a91b05086d596 (git)
Affected: e85a2d7837622bd99c96f5bbc7f972da90c285a2 , < 733cbc3aa97e71cc70847e75c925b364cc9b04a6 (git)
Affected: e85a2d7837622bd99c96f5bbc7f972da90c285a2 , < aefc0e0bd20f54abe3b501b8798c0be656af272b (git)
Affected: e85a2d7837622bd99c96f5bbc7f972da90c285a2 , < 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8 (git)
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Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions\n\nstruct configfs_item_operations callbacks are defined like the following:\n\n  int (*allow_link)(struct config_item *src, struct config_item *target);\n  void (*drop_link)(struct config_item *src, struct config_item *target);\n\nWhile pci_primary_epc_epf_link() and pci_secondary_epc_epf_link() specify\nthe parameters in the correct order, pci_primary_epc_epf_unlink() and\npci_secondary_epc_epf_unlink() specify the parameters in the wrong order,\nleading to the below kernel crash when using the unlink command in\nconfigfs:\n\n  Unable to handle kernel paging request at virtual address 0000000300000857\n  Mem abort info:\n  ...\n  pc : string+0x54/0x14c\n  lr : vsnprintf+0x280/0x6e8\n  ...\n  string+0x54/0x14c\n  vsnprintf+0x280/0x6e8\n  vprintk_default+0x38/0x4c\n  vprintk+0xc4/0xe0\n  pci_epf_unbind+0xdc/0x108\n  configfs_unlink+0xe0/0x208+0x44/0x74\n  vfs_unlink+0x120/0x29c\n  __arm64_sys_unlinkat+0x3c/0x90\n  invoke_syscall+0x48/0x134\n  do_el0_svc+0x1c/0x30prop.0+0xd0/0xf0\n\n[mani: cced stable, changed commit message as per https://lore.kernel.org/linux-pci/aV9joi3jF1R6ca02@ryzen]"
          }
        ],
        "id": "CVE-2026-43200",
        "lastModified": "2026-06-17T10:49:08.443",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-05-06T12:16:39.090",
        "references": [
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          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:35:56+00:00",
      "cve": "CVE-2026-43200",
      "id": "CVE-2026-43200",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43200.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T17:08:04Z",
      "cve": "CVE-2026-43200",
      "id": "CVE-2026-43200",
      "initial_release_date": "2026-05-09T02:41:07Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "528",
      "product_status:known_not_affected": "190",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43200",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43200.json",
      "version": "7"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.