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

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-06 11:28
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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/endpoint/pci-ep-cfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "58686bf62cb38b92e4b28408162a5703775b4d12",
              "status": "affected",
              "version": "e85a2d7837622bd99c96f5bbc7f972da90c285a2",
              "versionType": "git"
            },
            {
              "lessThan": "1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46",
              "status": "affected",
              "version": "e85a2d7837622bd99c96f5bbc7f972da90c285a2",
              "versionType": "git"
            },
            {
              "lessThan": "142b1bba3299264b76ed8ef53cd93b2b2af65d6c",
              "status": "affected",
              "version": "e85a2d7837622bd99c96f5bbc7f972da90c285a2",
              "versionType": "git"
            },
            {
              "lessThan": "339191811e6fc4559c4008c5af7a91b05086d596",
              "status": "affected",
              "version": "e85a2d7837622bd99c96f5bbc7f972da90c285a2",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "e85a2d7837622bd99c96f5bbc7f972da90c285a2",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "e85a2d7837622bd99c96f5bbc7f972da90c285a2",
              "versionType": "git"
            },
            {
              "lessThan": "8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8",
              "status": "affected",
              "version": "e85a2d7837622bd99c96f5bbc7f972da90c285a2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/endpoint/pci-ep-cfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T11:28:06.904Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/58686bf62cb38b92e4b28408162a5703775b4d12"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46"
        },
        {
          "url": "https://git.kernel.org/stable/c/142b1bba3299264b76ed8ef53cd93b2b2af65d6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/339191811e6fc4559c4008c5af7a91b05086d596"
        },
        {
          "url": "https://git.kernel.org/stable/c/733cbc3aa97e71cc70847e75c925b364cc9b04a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8"
        }
      ],
      "title": "PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43200",
    "datePublished": "2026-05-06T11:28:06.904Z",
    "dateReserved": "2026-05-01T14:12:55.992Z",
    "dateUpdated": "2026-05-06T11:28:06.904Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43200",
      "date": "2026-05-10",
      "epss": "0.00024",
      "percentile": "0.0704"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43200\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T12:16:39.090\",\"lastModified\":\"2026-05-06T13:07:51.607\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/142b1bba3299264b76ed8ef53cd93b2b2af65d6c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/339191811e6fc4559c4008c5af7a91b05086d596\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/58686bf62cb38b92e4b28408162a5703775b4d12\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/733cbc3aa97e71cc70847e75c925b364cc9b04a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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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

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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.