CVE-2026-72017 (GCVE-0-2026-72017)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-23 12:46
VLAI
Title
net: macb: drop in-flight Tx SKBs on close
Summary
In the Linux kernel, the following vulnerability has been resolved: net: macb: drop in-flight Tx SKBs on close The MACB driver has since forever leaked the outgoing SKBs that have not yet been marked as completed. They live in queue->tx_skb which gets freed without remorse nor checking. macb_free_consistent() gets called in a few codepaths, but only close will trigger the added expressions. In macb_open() and macb_alloc_consistent() failure cases, queues' tx_skb just got allocated and are empty.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 89e5785fc8a6b9eafd37f2318a9a76d479c796be , < 0e9797dc4ebdefe1b7f931b1f92d5e98e5dbf655 (git)
Affected: 89e5785fc8a6b9eafd37f2318a9a76d479c796be , < 6124bd785073659c99385094657b77382ebce11b (git)
Affected: 89e5785fc8a6b9eafd37f2318a9a76d479c796be , < 2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4 (git)
Affected: 89e5785fc8a6b9eafd37f2318a9a76d479c796be , < 26b131b2d5b55a81ef6182769d28105a870c0eb2 (git)
Affected: 89e5785fc8a6b9eafd37f2318a9a76d479c796be , < 109241d9880488aafd8e104832b4d4859ad57244 (git)
Affected: 89e5785fc8a6b9eafd37f2318a9a76d479c796be , < 27f575836cfebbf872dec020428742b10650a955 (git)
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Linux Linux Affected: 2.6.20
Unaffected: 0 , < 2.6.20 (semver)
Unaffected: 6.1.184 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 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/cadence/macb_main.c"
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              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/cadence/macb_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "2.6.20"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "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:*:*:*:*:*:*:*:*",
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: drop in-flight Tx SKBs on close\n\nThe MACB driver has since forever leaked the outgoing SKBs that\nhave not yet been marked as completed. They live in queue-\u003etx_skb\nwhich gets freed without remorse nor checking.\n\nmacb_free_consistent() gets called in a few codepaths, but only close will\ntrigger the added expressions. In macb_open() and macb_alloc_consistent()\nfailure cases, queues\u0027 tx_skb just got allocated and are empty."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-23T12:46:26.593Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0e9797dc4ebdefe1b7f931b1f92d5e98e5dbf655"
        },
        {
          "url": "https://git.kernel.org/stable/c/6124bd785073659c99385094657b77382ebce11b"
        },
        {
          "url": "https://git.kernel.org/stable/c/2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4"
        },
        {
          "url": "https://git.kernel.org/stable/c/26b131b2d5b55a81ef6182769d28105a870c0eb2"
        },
        {
          "url": "https://git.kernel.org/stable/c/109241d9880488aafd8e104832b4d4859ad57244"
        },
        {
          "url": "https://git.kernel.org/stable/c/27f575836cfebbf872dec020428742b10650a955"
        }
      ],
      "title": "net: macb: drop in-flight Tx SKBs on close",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72017",
    "datePublished": "2026-08-15T05:51:44.698Z",
    "dateReserved": "2026-08-09T03:40:39.900Z",
    "dateUpdated": "2026-08-23T12:46:26.593Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-21",
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      "percentile": "0.10938"
    },
    "nvd": {
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                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/cadence/macb_main.c"
                ],
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        "cveTags": [],
        "descriptions": [
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: drop in-flight Tx SKBs on close\n\nThe MACB driver has since forever leaked the outgoing SKBs that\nhave not yet been marked as completed. They live in queue-\u003etx_skb\nwhich gets freed without remorse nor checking.\n\nmacb_free_consistent() gets called in a few codepaths, but only close will\ntrigger the added expressions. In macb_open() and macb_alloc_consistent()\nfailure cases, queues\u0027 tx_skb just got allocated and are empty."
          }
        ],
        "id": "CVE-2026-72017",
        "lastModified": "2026-08-23T13:16:37.357",
        "metrics": {},
        "published": "2026-08-15T06:21:00.550",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T16:06:20+00:00",
      "cve": "CVE-2026-72017",
      "id": "CVE-2026-72017",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: macb: drop in-flight Tx SKBs on close",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72017.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-15T01:31:42Z",
      "cve": "CVE-2026-72017",
      "id": "CVE-2026-72017",
      "initial_release_date": "2026-08-27T00:24:34Z",
      "product_status:first_fixed": "23",
      "product_status:known_affected": "269",
      "product_status:known_not_affected": "93",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-72017",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72017.json",
      "version": "4"
    }
  }
}



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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.



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.