FKIE_CVE-2026-98571

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-19 10:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: clear stale buf->page after recycling on skb build failure In stmmac_rx(), when napi_build_skb() fails the descriptor page is recycled back to the page pool with page_pool_recycle_direct(), but buf->page is left pointing at the recycled page, unlike every other consumption site in the function which clears the pointer after handing the page away. With the stale pointer stmmac_rx_refill() skips the replacement allocation and programs the already-recycled page back into the RX descriptor. Clear buf->page on the napi_build_skb() failure path to keep the buffer lifecycle consistent with the other consumption sites.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a7822e34a0bfde31b194ac3da3253e5032b44cc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/298673397ea3f6f5811b84f0d9f71eac71dda2e3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/501baaeca7d128fa0a2f6953cf5873c5b0d7cf89
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "501baaeca7d128fa0a2f6953cf5873c5b0d7cf89",
              "status": "affected",
              "version": "df542f669307918f054a17878ff6dd1ddbb2fe18",
              "versionType": "git"
            },
            {
              "lessThan": "298673397ea3f6f5811b84f0d9f71eac71dda2e3",
              "status": "affected",
              "version": "df542f669307918f054a17878ff6dd1ddbb2fe18",
              "versionType": "git"
            },
            {
              "lessThan": "0a7822e34a0bfde31b194ac3da3253e5032b44cc",
              "status": "affected",
              "version": "df542f669307918f054a17878ff6dd1ddbb2fe18",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: clear stale buf-\u003epage after recycling on skb build failure\n\nIn stmmac_rx(), when napi_build_skb() fails the descriptor page is\nrecycled back to the page pool with page_pool_recycle_direct(), but\nbuf-\u003epage is left pointing at the recycled page, unlike every other\nconsumption site in the function which clears the pointer after handing\nthe page away.\n\nWith the stale pointer stmmac_rx_refill() skips the replacement\nallocation and programs the already-recycled page back into the RX\ndescriptor.\n\nClear buf-\u003epage on the napi_build_skb() failure path to keep the buffer\nlifecycle consistent with the other consumption sites."
    }
  ],
  "id": "CVE-2026-98571",
  "lastModified": "2026-10-19T10:19:15.207",
  "metrics": {},
  "published": "2026-10-18T16:17:09.363",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0a7822e34a0bfde31b194ac3da3253e5032b44cc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/298673397ea3f6f5811b84f0d9f71eac71dda2e3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/501baaeca7d128fa0a2f6953cf5873c5b0d7cf89"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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