Vulnerability-Lookup

CVE-2026-80917 (GCVE-0-2026-80917)

Vulnerability from cvelistv5 – Published: 2026-09-09 16:13 – Updated: 2026-09-09 16:13

Title

PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems On 32-bit systems the config space is too large to ioremap in one go, so pci_ecam_create() maps each bus segment separately and relies on the ->add_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in cfg->winp[]. pci_ecam_map_bus() then uses that mapping as the base for every config access. The generic ECAM ops (pci_generic_ecam_ops) already provide the ->add_bus and ->remove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c do not. As a result, on a 32-bit host using "pci-host-cam-generic" the per-bus mapping is never set up and the first config read dereferences a NULL base, crashing during bus enumeration: Unable to handle kernel NULL pointer dereference at virtual address 00000800 Oops [#1] CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43 Hardware name: Digilent Nexys-Video-A7 RV32 (DT) epc : pci_generic_config_read+0x40/0xb0 ra : pci_generic_config_read+0x2c/0xb0 [<c038db9c>] pci_generic_config_read+0x40/0xb0 [<c038da04>] pci_bus_read_config_dword+0x50/0xb0 [<c0391e94>] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec [<c039245c>] pci_scan_single_device+0xa4/0x11c [<c0392570>] pci_scan_slot+0x9c/0x23c [<c039388c>] pci_scan_child_bus_extend+0x58/0x2f4 [<c0393db0>] pci_scan_root_bus_bridge+0x64/0xe8 [<c0393e54>] pci_host_probe+0x20/0xc8 [<c03bc6f4>] pci_host_common_probe+0x144/0x1e4 Fix this by giving the CAM ops the same ->add_bus/->remove_bus callbacks. Since pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c, move the CAM ops definition there as pci_generic_cam_ops (mirroring pci_generic_ecam_ops) and export it for pci-host-generic.c to reference. [mani: removed timestamp from log]

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/5e52eb0290f66ba07…
https://git.kernel.org/stable/c/baf9b0383ff770fdf…
https://git.kernel.org/stable/c/8d08713ec83a18526…
https://git.kernel.org/stable/c/74456843f18ba7f30…
https://git.kernel.org/stable/c/0c55707bd5d0d7670…
https://git.kernel.org/stable/c/a199293f3038db8d3…
https://git.kernel.org/stable/c/0916948026f623844…
https://git.kernel.org/stable/c/008cb88edb41f3c7c…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < 5e52eb0290f66ba0732956dcb1e365b5ca3c5108 (git) Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < baf9b0383ff770fdff123d3a832f3a99641d96dd (git) Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < 8d08713ec83a18526d1ed1fd5f0d2b901d103a10 (git) Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < 74456843f18ba7f3045974d7e8b88ab993152b8c (git) Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < 0c55707bd5d0d7670704cfd0dda933809b052f67 (git) Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < a199293f3038db8d31d47aa60f1e18272cd82354 (git) Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < 0916948026f623844acd08888f7cbedbf1c48d6b (git) Affected: 8fe55ef23387ce3c7488375b1fd539420d7654bb , < 008cb88edb41f3c7c8e0ed763ff9f26719830984 (git) Affected: 0b5877a1aeacdbf32b3bea91326592004ec7806f (git) Affected: a037ebbe72a4f98495b193112e2b2000e5e09eb5 (git) Affected: 5.12.19 , < 5.13 (semver) Affected: 5.13.4 , < 5.14 (semver)	guessed
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 5.15.218 , ≤ 5.15.* (semver) Unaffected: 6.1.185 , ≤ 6.1.* (semver) Unaffected: 6.6.154 , ≤ 6.6.* (semver) Unaffected: 6.12.106 , ≤ 6.12.* (semver) Unaffected: 6.18.47 , ≤ 6.18.* (semver) Unaffected: 7.1.11 , ≤ 7.1.* (semver) Unaffected: 7.2.1 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)	guessed

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/controller/pci-host-generic.c",
            "drivers/pci/ecam.c",
            "include/linux/pci-ecam.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
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              "status": "affected",
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            },
            {
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a037ebbe72a4f98495b193112e2b2000e5e09eb5",
              "versionType": "git"
            },
            {
              "lessThan": "5.13",
              "status": "affected",
              "version": "5.12.19",
              "versionType": "semver"
            },
            {
              "lessThan": "5.14",
              "status": "affected",
              "version": "5.13.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/controller/pci-host-generic.c",
            "drivers/pci/ecam.c",
            "include/linux/pci-ecam.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.218",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.185",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.154",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.106",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.47",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.11",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.1",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.12.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.13.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems\n\nOn 32-bit systems the config space is too large to ioremap in one go, so\npci_ecam_create() maps each bus segment separately and relies on the\n-\u003eadd_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in\ncfg-\u003ewinp[]. pci_ecam_map_bus() then uses that mapping as the base for\nevery config access.\n\nThe generic ECAM ops (pci_generic_ecam_ops) already provide the -\u003eadd_bus\nand -\u003eremove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c\ndo not. As a result, on a 32-bit host using \"pci-host-cam-generic\" the\nper-bus mapping is never set up and the first config read dereferences a\nNULL base, crashing during bus enumeration:\n\n Unable to handle kernel NULL pointer dereference at virtual address 00000800\n Oops [#1]\n CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43\n Hardware name: Digilent Nexys-Video-A7 RV32 (DT)\n epc : pci_generic_config_read+0x40/0xb0\n  ra : pci_generic_config_read+0x2c/0xb0\n [\u003cc038db9c\u003e] pci_generic_config_read+0x40/0xb0\n [\u003cc038da04\u003e] pci_bus_read_config_dword+0x50/0xb0\n [\u003cc0391e94\u003e] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec\n [\u003cc039245c\u003e] pci_scan_single_device+0xa4/0x11c\n [\u003cc0392570\u003e] pci_scan_slot+0x9c/0x23c\n [\u003cc039388c\u003e] pci_scan_child_bus_extend+0x58/0x2f4\n [\u003cc0393db0\u003e] pci_scan_root_bus_bridge+0x64/0xe8\n [\u003cc0393e54\u003e] pci_host_probe+0x20/0xc8\n [\u003cc03bc6f4\u003e] pci_host_common_probe+0x144/0x1e4\n\nFix this by giving the CAM ops the same -\u003eadd_bus/-\u003eremove_bus callbacks.\nSince pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c,\nmove the CAM ops definition there as pci_generic_cam_ops (mirroring\npci_generic_ecam_ops) and export it for pci-host-generic.c to reference.\n\n[mani: removed timestamp from log]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-09T16:13:15.202Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5e52eb0290f66ba0732956dcb1e365b5ca3c5108"
        },
        {
          "url": "https://git.kernel.org/stable/c/baf9b0383ff770fdff123d3a832f3a99641d96dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d08713ec83a18526d1ed1fd5f0d2b901d103a10"
        },
        {
          "url": "https://git.kernel.org/stable/c/74456843f18ba7f3045974d7e8b88ab993152b8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c55707bd5d0d7670704cfd0dda933809b052f67"
        },
        {
          "url": "https://git.kernel.org/stable/c/a199293f3038db8d31d47aa60f1e18272cd82354"
        },
        {
          "url": "https://git.kernel.org/stable/c/0916948026f623844acd08888f7cbedbf1c48d6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/008cb88edb41f3c7c8e0ed763ff9f26719830984"
        }
      ],
      "title": "PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80917",
    "datePublished": "2026-09-09T16:13:15.202Z",
    "dateReserved": "2026-08-26T14:34:25.801Z",
    "dateUpdated": "2026-09-09T16:13:15.202Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80917\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-09T17:17:46.680\",\"lastModified\":\"2026-09-09T17:17:46.680\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nPCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems\\n\\nOn 32-bit systems the config space is too large to ioremap in one go, so\\npci_ecam_create() maps each bus segment separately and relies on the\\n-\u003eadd_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in\\ncfg-\u003ewinp[]. pci_ecam_map_bus() then uses that mapping as the base for\\nevery config access.\\n\\nThe generic ECAM ops (pci_generic_ecam_ops) already provide the -\u003eadd_bus\\nand -\u003eremove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c\\ndo not. As a result, on a 32-bit host using \\\"pci-host-cam-generic\\\" the\\nper-bus mapping is never set up and the first config read dereferences a\\nNULL base, crashing during bus enumeration:\\n\\n Unable to handle kernel NULL pointer dereference at virtual address 00000800\\n Oops [#1]\\n CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43\\n Hardware name: Digilent Nexys-Video-A7 RV32 (DT)\\n epc : pci_generic_config_read+0x40/0xb0\\n  ra : pci_generic_config_read+0x2c/0xb0\\n [\u003cc038db9c\u003e] pci_generic_config_read+0x40/0xb0\\n [\u003cc038da04\u003e] pci_bus_read_config_dword+0x50/0xb0\\n [\u003cc0391e94\u003e] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec\\n [\u003cc039245c\u003e] pci_scan_single_device+0xa4/0x11c\\n [\u003cc0392570\u003e] pci_scan_slot+0x9c/0x23c\\n [\u003cc039388c\u003e] pci_scan_child_bus_extend+0x58/0x2f4\\n [\u003cc0393db0\u003e] pci_scan_root_bus_bridge+0x64/0xe8\\n [\u003cc0393e54\u003e] pci_host_probe+0x20/0xc8\\n [\u003cc03bc6f4\u003e] pci_host_common_probe+0x144/0x1e4\\n\\nFix this by giving the CAM ops the same -\u003eadd_bus/-\u003eremove_bus callbacks.\\nSince pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c,\\nmove the CAM ops definition there as pci_generic_cam_ops (mirroring\\npci_generic_ecam_ops) and export it for pci-host-generic.c to reference.\\n\\n[mani: removed timestamp from log]\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/pci/controller/pci-host-generic.c\",\"drivers/pci/ecam.c\",\"include/linux/pci-ecam.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"5e52eb0290f66ba0732956dcb1e365b5ca3c5108\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"baf9b0383ff770fdff123d3a832f3a99641d96dd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"8d08713ec83a18526d1ed1fd5f0d2b901d103a10\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"74456843f18ba7f3045974d7e8b88ab993152b8c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"0c55707bd5d0d7670704cfd0dda933809b052f67\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"a199293f3038db8d31d47aa60f1e18272cd82354\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"0916948026f623844acd08888f7cbedbf1c48d6b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8fe55ef23387ce3c7488375b1fd539420d7654bb\",\"lessThan\":\"008cb88edb41f3c7c8e0ed763ff9f26719830984\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0b5877a1aeacdbf32b3bea91326592004ec7806f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a037ebbe72a4f98495b193112e2b2000e5e09eb5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.12.19\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.13.4\",\"lessThan\":\"5.14\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/pci/controller/pci-host-generic.c\",\"drivers/pci/ecam.c\",\"include/linux/pci-ecam.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.218\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.185\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.154\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.106\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.47\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.11\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.1\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/008cb88edb41f3c7c8e0ed763ff9f26719830984\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0916948026f623844acd08888f7cbedbf1c48d6b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0c55707bd5d0d7670704cfd0dda933809b052f67\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5e52eb0290f66ba0732956dcb1e365b5ca3c5108\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/74456843f18ba7f3045974d7e8b88ab993152b8c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d08713ec83a18526d1ed1fd5f0d2b901d103a10\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a199293f3038db8d31d47aa60f1e18272cd82354\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/baf9b0383ff770fdff123d3a832f3a99641d96dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-80917

Vulnerability from fkie_nvd - Published: 2026-09-09 17:17 - Updated: 2026-09-09 17:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/008cb88edb41f3c7c8e0ed763ff9f26719830984
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0916948026f623844acd08888f7cbedbf1c48d6b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c55707bd5d0d7670704cfd0dda933809b052f67
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e52eb0290f66ba0732956dcb1e365b5ca3c5108
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/74456843f18ba7f3045974d7e8b88ab993152b8c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8d08713ec83a18526d1ed1fd5f0d2b901d103a10
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a199293f3038db8d31d47aa60f1e18272cd82354
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/baf9b0383ff770fdff123d3a832f3a99641d96dd

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/controller/pci-host-generic.c",
            "drivers/pci/ecam.c",
            "include/linux/pci-ecam.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5e52eb0290f66ba0732956dcb1e365b5ca3c5108",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "lessThan": "baf9b0383ff770fdff123d3a832f3a99641d96dd",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "lessThan": "8d08713ec83a18526d1ed1fd5f0d2b901d103a10",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "lessThan": "74456843f18ba7f3045974d7e8b88ab993152b8c",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "lessThan": "0c55707bd5d0d7670704cfd0dda933809b052f67",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "lessThan": "a199293f3038db8d31d47aa60f1e18272cd82354",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "lessThan": "0916948026f623844acd08888f7cbedbf1c48d6b",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "lessThan": "008cb88edb41f3c7c8e0ed763ff9f26719830984",
              "status": "affected",
              "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0b5877a1aeacdbf32b3bea91326592004ec7806f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a037ebbe72a4f98495b193112e2b2000e5e09eb5",
              "versionType": "git"
            },
            {
              "lessThan": "5.13",
              "status": "affected",
              "version": "5.12.19",
              "versionType": "semver"
            },
            {
              "lessThan": "5.14",
              "status": "affected",
              "version": "5.13.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/controller/pci-host-generic.c",
            "drivers/pci/ecam.c",
            "include/linux/pci-ecam.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems\n\nOn 32-bit systems the config space is too large to ioremap in one go, so\npci_ecam_create() maps each bus segment separately and relies on the\n-\u003eadd_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in\ncfg-\u003ewinp[]. pci_ecam_map_bus() then uses that mapping as the base for\nevery config access.\n\nThe generic ECAM ops (pci_generic_ecam_ops) already provide the -\u003eadd_bus\nand -\u003eremove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c\ndo not. As a result, on a 32-bit host using \"pci-host-cam-generic\" the\nper-bus mapping is never set up and the first config read dereferences a\nNULL base, crashing during bus enumeration:\n\n Unable to handle kernel NULL pointer dereference at virtual address 00000800\n Oops [#1]\n CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43\n Hardware name: Digilent Nexys-Video-A7 RV32 (DT)\n epc : pci_generic_config_read+0x40/0xb0\n  ra : pci_generic_config_read+0x2c/0xb0\n [\u003cc038db9c\u003e] pci_generic_config_read+0x40/0xb0\n [\u003cc038da04\u003e] pci_bus_read_config_dword+0x50/0xb0\n [\u003cc0391e94\u003e] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec\n [\u003cc039245c\u003e] pci_scan_single_device+0xa4/0x11c\n [\u003cc0392570\u003e] pci_scan_slot+0x9c/0x23c\n [\u003cc039388c\u003e] pci_scan_child_bus_extend+0x58/0x2f4\n [\u003cc0393db0\u003e] pci_scan_root_bus_bridge+0x64/0xe8\n [\u003cc0393e54\u003e] pci_host_probe+0x20/0xc8\n [\u003cc03bc6f4\u003e] pci_host_common_probe+0x144/0x1e4\n\nFix this by giving the CAM ops the same -\u003eadd_bus/-\u003eremove_bus callbacks.\nSince pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c,\nmove the CAM ops definition there as pci_generic_cam_ops (mirroring\npci_generic_ecam_ops) and export it for pci-host-generic.c to reference.\n\n[mani: removed timestamp from log]"
    }
  ],
  "id": "CVE-2026-80917",
  "lastModified": "2026-09-09T17:17:46.680",
  "metrics": {},
  "published": "2026-09-09T17:17:46.680",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/008cb88edb41f3c7c8e0ed763ff9f26719830984"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0916948026f623844acd08888f7cbedbf1c48d6b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0c55707bd5d0d7670704cfd0dda933809b052f67"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5e52eb0290f66ba0732956dcb1e365b5ca3c5108"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74456843f18ba7f3045974d7e8b88ab993152b8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8d08713ec83a18526d1ed1fd5f0d2b901d103a10"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a199293f3038db8d31d47aa60f1e18272cd82354"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/baf9b0383ff770fdff123d3a832f3a99641d96dd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-9V6F-6HX3-8XXJ

Vulnerability from github – Published: 2026-09-09 18:32 – Updated: 2026-09-09 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems

On 32-bit systems the config space is too large to ioremap in one go, so pci_ecam_create() maps each bus segment separately and relies on the ->add_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in cfg->winp[]. pci_ecam_map_bus() then uses that mapping as the base for every config access.

The generic ECAM ops (pci_generic_ecam_ops) already provide the ->add_bus and ->remove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c do not. As a result, on a 32-bit host using "pci-host-cam-generic" the per-bus mapping is never set up and the first config read dereferences a NULL base, crashing during bus enumeration:

Unable to handle kernel NULL pointer dereference at virtual address 00000800 Oops [#1] CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43 Hardware name: Digilent Nexys-Video-A7 RV32 (DT) epc : pci_generic_config_read+0x40/0xb0 ra : pci_generic_config_read+0x2c/0xb0 [] pci_generic_config_read+0x40/0xb0 [] pci_bus_read_config_dword+0x50/0xb0 [] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec [] pci_scan_single_device+0xa4/0x11c [] pci_scan_slot+0x9c/0x23c [] pci_scan_child_bus_extend+0x58/0x2f4 [] pci_scan_root_bus_bridge+0x64/0xe8 [] pci_host_probe+0x20/0xc8 [] pci_host_common_probe+0x144/0x1e4

Fix this by giving the CAM ops the same ->add_bus/->remove_bus callbacks. Since pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c, move the CAM ops definition there as pci_generic_cam_ops (mirroring pci_generic_ecam_ops) and export it for pci-host-generic.c to reference.

[mani: removed timestamp from log]

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-80917"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-09T17:17:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems\n\nOn 32-bit systems the config space is too large to ioremap in one go, so\npci_ecam_create() maps each bus segment separately and relies on the\n-\u003eadd_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in\ncfg-\u003ewinp[]. pci_ecam_map_bus() then uses that mapping as the base for\nevery config access.\n\nThe generic ECAM ops (pci_generic_ecam_ops) already provide the -\u003eadd_bus\nand -\u003eremove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c\ndo not. As a result, on a 32-bit host using \"pci-host-cam-generic\" the\nper-bus mapping is never set up and the first config read dereferences a\nNULL base, crashing during bus enumeration:\n\n Unable to handle kernel NULL pointer dereference at virtual address 00000800\n Oops [#1]\n CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43\n Hardware name: Digilent Nexys-Video-A7 RV32 (DT)\n epc : pci_generic_config_read+0x40/0xb0\n  ra : pci_generic_config_read+0x2c/0xb0\n [\u003cc038db9c\u003e] pci_generic_config_read+0x40/0xb0\n [\u003cc038da04\u003e] pci_bus_read_config_dword+0x50/0xb0\n [\u003cc0391e94\u003e] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec\n [\u003cc039245c\u003e] pci_scan_single_device+0xa4/0x11c\n [\u003cc0392570\u003e] pci_scan_slot+0x9c/0x23c\n [\u003cc039388c\u003e] pci_scan_child_bus_extend+0x58/0x2f4\n [\u003cc0393db0\u003e] pci_scan_root_bus_bridge+0x64/0xe8\n [\u003cc0393e54\u003e] pci_host_probe+0x20/0xc8\n [\u003cc03bc6f4\u003e] pci_host_common_probe+0x144/0x1e4\n\nFix this by giving the CAM ops the same -\u003eadd_bus/-\u003eremove_bus callbacks.\nSince pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c,\nmove the CAM ops definition there as pci_generic_cam_ops (mirroring\npci_generic_ecam_ops) and export it for pci-host-generic.c to reference.\n\n[mani: removed timestamp from log]",
  "id": "GHSA-9v6f-6hx3-8xxj",
  "modified": "2026-09-09T18:32:04Z",
  "published": "2026-09-09T18:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80917"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/008cb88edb41f3c7c8e0ed763ff9f26719830984"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0916948026f623844acd08888f7cbedbf1c48d6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c55707bd5d0d7670704cfd0dda933809b052f67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e52eb0290f66ba0732956dcb1e365b5ca3c5108"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74456843f18ba7f3045974d7e8b88ab993152b8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d08713ec83a18526d1ed1fd5f0d2b901d103a10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a199293f3038db8d31d47aa60f1e18272cd82354"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/baf9b0383ff770fdff123d3a832f3a99641d96dd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Action not permitted

CVE-2026-80917 (GCVE-0-2026-80917)

FKIE_CVE-2026-80917

GHSA-9V6F-6HX3-8XXJ

Tags

Sightings

Nomenclature