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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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
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                }
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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\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"
      }
    }
  },
  "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72017",
      "date": "2026-08-24",
      "epss": "0.00206",
      "percentile": "0.10498"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72017\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:21:00.550\",\"lastModified\":\"2026-08-23T13:16:37.357\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/cadence/macb_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"89e5785fc8a6b9eafd37f2318a9a76d479c796be\",\"lessThan\":\"0e9797dc4ebdefe1b7f931b1f92d5e98e5dbf655\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"89e5785fc8a6b9eafd37f2318a9a76d479c796be\",\"lessThan\":\"6124bd785073659c99385094657b77382ebce11b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"89e5785fc8a6b9eafd37f2318a9a76d479c796be\",\"lessThan\":\"2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"89e5785fc8a6b9eafd37f2318a9a76d479c796be\",\"lessThan\":\"26b131b2d5b55a81ef6182769d28105a870c0eb2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"89e5785fc8a6b9eafd37f2318a9a76d479c796be\",\"lessThan\":\"109241d9880488aafd8e104832b4d4859ad57244\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"89e5785fc8a6b9eafd37f2318a9a76d479c796be\",\"lessThan\":\"27f575836cfebbf872dec020428742b10650a955\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/cadence/macb_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.20\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.20\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0e9797dc4ebdefe1b7f931b1f92d5e98e5dbf655\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/109241d9880488aafd8e104832b4d4859ad57244\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2143fdc0ce27adbb1caaa1a97e0bfb9f3750aef4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/26b131b2d5b55a81ef6182769d28105a870c0eb2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/27f575836cfebbf872dec020428742b10650a955\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6124bd785073659c99385094657b77382ebce11b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "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"
    }
  }
}



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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.