CVE-2026-99045 (GCVE-0-2026-99045)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:22 – Updated: 2026-10-23 12:22
VLAI
Title
ibmveth: h_free logical LAN on open-fail after register
Summary
In the Linux kernel, the following vulnerability has been resolved: ibmveth: h_free logical LAN on open-fail after register ibmveth_open() registers the logical LAN, then allocates the RX buffer pools. A pool failure jumps to out_free_buffer_pools without h_free_logical_lan(), so PHYP still owns the buffer-list page when it is unmapped. request_irq() failure already issued the hypercall before taking the same label. Move that h_free to the shared post-register unwind so both paths deregister before the buffer list is unmapped.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7056 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d43732ce021f4244a4c53a45d57ad0c13c30ed94 , < decb4d4ead2c71ef698727734ab5024a872eb372 (git)
Affected: d43732ce021f4244a4c53a45d57ad0c13c30ed94 , < c54bbdf6f0731102a4bf7f5e4ee535b3ea415996 (git)
Affected: d43732ce021f4244a4c53a45d57ad0c13c30ed94 , < a065bd31ec462f6f9c267026b708dd020f122723 (git)
Affected: d43732ce021f4244a4c53a45d57ad0c13c30ed94 , < d24fdec1413c656d29298097926e77542785ca0c (git)
Affected: d43732ce021f4244a4c53a45d57ad0c13c30ed94 , < af0524bf4ce1a4cbd2946aa81751582951cfcab5 (git)
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Linux Linux Affected: 4.13
Unaffected: 0 , < 4.13 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/ibm/ibmveth.c"
          ],
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          "vendor": "Linux",
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          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "4.13"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
            },
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              "status": "unaffected",
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            }
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      ],
      "cpeApplicability": [
        {
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nibmveth: h_free logical LAN on open-fail after register\n\nibmveth_open() registers the logical LAN, then allocates the RX\nbuffer pools. A pool failure jumps to out_free_buffer_pools without\nh_free_logical_lan(), so PHYP still owns the buffer-list page when\nit is unmapped. request_irq() failure already issued the hypercall\nbefore taking the same label.\n\nMove that h_free to the shared post-register unwind so both paths\nderegister before the buffer list is unmapped."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T12:22:09.352Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/decb4d4ead2c71ef698727734ab5024a872eb372"
        },
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          "url": "https://git.kernel.org/stable/c/c54bbdf6f0731102a4bf7f5e4ee535b3ea415996"
        },
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          "url": "https://git.kernel.org/stable/c/a065bd31ec462f6f9c267026b708dd020f122723"
        },
        {
          "url": "https://git.kernel.org/stable/c/d24fdec1413c656d29298097926e77542785ca0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/af0524bf4ce1a4cbd2946aa81751582951cfcab5"
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      ],
      "title": "ibmveth: h_free logical LAN on open-fail after register",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99045",
    "datePublished": "2026-10-23T12:22:09.352Z",
    "dateReserved": "2026-09-25T10:25:14.387Z",
    "dateUpdated": "2026-10-23T12:22:09.352Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-25",
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      "percentile": "0.07066"
    },
    "microsoft_vex": {
      "current_release_date": "2026-10-25T01:05:31.000Z",
      "cve": "CVE-2026-99045",
      "id": "msrc_CVE-2026-99045",
      "initial_release_date": "2026-10-25T01:04:33.000Z",
      "product_status:under_investigation": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "ibmveth: h_free logical LAN on open-fail after register",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-99045.json",
      "version": "2"
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    "nvd": {
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                "product": "Linux",
                "programFiles": [
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                ],
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nibmveth: h_free logical LAN on open-fail after register\n\nibmveth_open() registers the logical LAN, then allocates the RX\nbuffer pools. A pool failure jumps to out_free_buffer_pools without\nh_free_logical_lan(), so PHYP still owns the buffer-list page when\nit is unmapped. request_irq() failure already issued the hypercall\nbefore taking the same label.\n\nMove that h_free to the shared post-register unwind so both paths\nderegister before the buffer list is unmapped."
          }
        ],
        "id": "CVE-2026-99045",
        "lastModified": "2026-10-23T13:17:27.953",
        "metrics": {},
        "published": "2026-10-23T13:17:27.953",
        "references": [
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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