CVE-2026-98492 (GCVE-0-2026-98492)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:16 – Updated: 2026-10-19 09:20
VLAI
Title
net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths
Summary
In the Linux kernel, the following vulnerability has been resolved: net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths Fix 3 leaks in macb_alloc() error paths: - Tx buffer allocated but crossing a 4G boundary: Tx leaked. - Rx buffer allocation fails: Tx leaked. - Rx buffer allocated but crossing a 4G boundary: Tx & Rx leaked. This is because our error handling calls macb_free(bp) which in turn frees the buffers stored in bp->queues[0], but nothing has been stored in there. Fix by storing allocated buffers into bp->queues[0] ASAP.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7064 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 78d901897b3cae06b38f54e48a2378cf9da21175 , < bda487567d0b7b15dfa876511085c0666b9efad5 (git)
Affected: 78d901897b3cae06b38f54e48a2378cf9da21175 , < 259e6cbb6a097da8ced544ee92a6fbde35aa1338 (git)
Affected: 78d901897b3cae06b38f54e48a2378cf9da21175 , < 23d42b9a3bcd55b17d3b371544fedc708c2397e9 (git)
Affected: 982a4d9a2e12b693f684eff943043a607628d871 (git)
Affected: 6.17.3 , < 6.18 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/cadence/macb_main.c"
          ],
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          "versions": [
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              ],
              "negate": false,
              "operator": "OR"
            }
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      ],
      "descriptions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths\n\nFix 3 leaks in macb_alloc() error paths:\n- Tx buffer allocated but crossing a 4G boundary: Tx leaked.\n- Rx buffer allocation fails: Tx leaked.\n- Rx buffer allocated but crossing a 4G boundary: Tx \u0026 Rx leaked.\n\nThis is because our error handling calls macb_free(bp) which in turn\nfrees the buffers stored in bp-\u003equeues[0], but nothing has been stored\nin there. Fix by storing allocated buffers into bp-\u003equeues[0] ASAP."
        }
      ],
      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-10-18T15:16:21.208Z",
    "dateReserved": "2026-09-25T10:25:14.353Z",
    "dateUpdated": "2026-10-19T09:20:29.361Z",
    "state": "PUBLISHED"
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      "epss": "0.00198",
      "percentile": "0.095"
    },
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      "cve": "CVE-2026-98492",
      "id": "msrc_CVE-2026-98492",
      "initial_release_date": "2026-10-20T22:24:05.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
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      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98492.json",
      "version": "2"
    },
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                "product": "Linux",
                "programFiles": [
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                ],
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          }
        ],
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        "metrics": {},
        "published": "2026-10-18T16:17:00.150",
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}



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