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

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dcc34ef7c83473222027f475014a2bf8ab798372 , < a103cdb0681e7185d1b0a12ce6a7c5416c208ccd (git)
Affected: dcc34ef7c83473222027f475014a2bf8ab798372 , < 44068b6863fbda78fc810921ddf61642c377b3ca (git)
Affected: dcc34ef7c83473222027f475014a2bf8ab798372 , < f623d38fe6c4e8c40b23f42cc6fe6963fa49997b (git)
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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"
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              "operator": "OR"
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          "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()."
        }
      ],
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            "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": [
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              "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."
            }
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        }
      ],
      "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/f623d38fe6c4e8c40b23f42cc6fe6963fa49997b"
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      "title": "net: emac: Fix NULL pointer dereference in emac_probe",
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    "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"
  },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-31T12:15:36+00:00",
      "cve": "CVE-2026-80614",
      "id": "CVE-2026-80614",
      "initial_release_date": "2026-08-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: emac: Fix NULL pointer dereference in emac_probe",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80614.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:06:25Z",
      "cve": "CVE-2026-80614",
      "id": "CVE-2026-80614",
      "initial_release_date": "2026-08-28T16:36:21Z",
      "product_status:known_not_affected": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80614",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80614.json",
      "version": "7"
    }
  }
}



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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

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.


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.