Vulnerability-Lookup

GHSA-72VM-9GWV-CWMM

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30

Details

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

net: emac: Fix NULL pointer dereference in emac_probe

Move devm_request_irq() after devm_platform_ioremap_resource() so that dev->emacp is mapped before the interrupt handler can fire. An early interrupt hitting emac_irq() would dereference the NULL dev->emacp and crash.

Also remove redundant error message. devm_platform_ioremap_resource() already returns an error message with dev_err_probe().

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80614"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:45Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: emac: Fix NULL pointer dereference in emac_probe\n\nMove devm_request_irq() after devm_platform_ioremap_resource() so that\ndev-\u003eemacp is mapped before the interrupt handler can fire.  An early\ninterrupt hitting emac_irq() would dereference the NULL dev-\u003eemacp and\ncrash.\n\nAlso remove redundant error message. devm_platform_ioremap_resource()\nalready returns an error message with dev_err_probe().",
  "id": "GHSA-72vm-9gwv-cwmm",
  "modified": "2026-08-29T09:30:25Z",
  "published": "2026-08-28T09:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80614"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44068b6863fbda78fc810921ddf61642c377b3ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a103cdb0681e7185d1b0a12ce6a7c5416c208ccd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f623d38fe6c4e8c40b23f42cc6fe6963fa49997b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80614 (GCVE-0-2026-80614)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21

Title

net: emac: Fix NULL pointer dereference in emac_probe

Summary

In the Linux kernel, the following vulnerability has been resolved: net: emac: Fix NULL pointer dereference in emac_probe Move devm_request_irq() after devm_platform_ioremap_resource() so that dev->emacp is mapped before the interrupt handler can fire. An early interrupt hitting emac_irq() would dereference the NULL dev->emacp and crash. Also remove redundant error message. devm_platform_ioremap_resource() already returns an error message with dev_err_probe().

Severity

7.5 (High)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a103cdb0681e7185d…
https://git.kernel.org/stable/c/44068b6863fbda78f…
https://git.kernel.org/stable/c/f623d38fe6c4e8c40…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: dcc34ef7c83473222027f475014a2bf8ab798372 , < a103cdb0681e7185d1b0a12ce6a7c5416c208ccd (git) Affected: dcc34ef7c83473222027f475014a2bf8ab798372 , < 44068b6863fbda78fc810921ddf61642c377b3ca (git) Affected: dcc34ef7c83473222027f475014a2bf8ab798372 , < f623d38fe6c4e8c40b23f42cc6fe6963fa49997b (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ibm/emac/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a103cdb0681e7185d1b0a12ce6a7c5416c208ccd",
              "status": "affected",
              "version": "dcc34ef7c83473222027f475014a2bf8ab798372",
              "versionType": "git"
            },
            {
              "lessThan": "44068b6863fbda78fc810921ddf61642c377b3ca",
              "status": "affected",
              "version": "dcc34ef7c83473222027f475014a2bf8ab798372",
              "versionType": "git"
            },
            {
              "lessThan": "f623d38fe6c4e8c40b23f42cc6fe6963fa49997b",
              "status": "affected",
              "version": "dcc34ef7c83473222027f475014a2bf8ab798372",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ibm/emac/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: emac: Fix NULL pointer dereference in emac_probe\n\nMove devm_request_irq() after devm_platform_ioremap_resource() so that\ndev-\u003eemacp is mapped before the interrupt handler can fire.  An early\ninterrupt hitting emac_irq() would dereference the NULL dev-\u003eemacp and\ncrash.\n\nAlso remove redundant error message. devm_platform_ioremap_resource()\nalready returns an error message with dev_err_probe()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - IBM EMAC error IRQs are raised by the on-chip Ethernet controller from wire-side events; a remote attacker on the attached network can send Ethernet traffic during emac_probe to assert interrupts that invoke emac_irq() before dev-\u003eemacp is ioremap\u0027d.\nAC:L - Once devm_request_irq() registers emac_irq(), any EMAC interrupt fires immediately; an attacker can sustain Ethernet flooding throughout boot/probe, and firmware often leaves the controller active with pending IRQs that hit the narrow pre-ioremap window reliably.\nPR:N - Triggering EMAC hardware interrupts requires only the ability to send Ethernet frames on the connected network segment during driver probe, not local shell access, capabilities, or authenticated sessions.\nUI:N - Exploitation occurs during automatic platform-driver probe at kernel boot or module initialization; no discretionary user action is required beyond the device powering on with its Ethernet port connected.\nS:U - A NULL pointer dereference in the EMAC hard-IRQ handler causes a local kernel oops or panic only; it does not cross VM, container, or IOMMU security boundaries.\nC:N - The bug dereferences a NULL dev-\u003eemacp when reading ISR registers via in_be32(), causing an immediate kernel fault with no attacker-controlled memory disclosure or out-of-bounds read.\nI:N - Impact is limited to a NULL pointer fault in hardirq context; there is no heap corruption, arbitrary write, or control-flow hijack primitive beyond the crash itself.\nA:H - A NULL pointer dereference in emac_irq() hard interrupt context causes a kernel oops or panic, rendering the entire system unavailable on affected PowerPC embedded platforms."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:21:22.838Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/a103cdb0681e7185d1b0a12ce6a7c5416c208ccd"
        },
        {
          "url": "https://git.kernel.org/stable/c/44068b6863fbda78fc810921ddf61642c377b3ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/f623d38fe6c4e8c40b23f42cc6fe6963fa49997b"
        }
      ],
      "title": "net: emac: Fix NULL pointer dereference in emac_probe",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80614",
    "datePublished": "2026-08-28T06:48:35.720Z",
    "dateReserved": "2026-08-26T14:34:25.773Z",
    "dateUpdated": "2026-08-29T06:21:22.838Z",
    "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.

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.
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