CVE-2026-98571 (GCVE-0-2026-98571)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:18 – Updated: 2026-10-19 09:21
VLAI
Title
net: stmmac: clear stale buf->page after recycling on skb build failure
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: df542f669307918f054a17878ff6dd1ddbb2fe18 , < 501baaeca7d128fa0a2f6953cf5873c5b0d7cf89 (git)
Affected: df542f669307918f054a17878ff6dd1ddbb2fe18 , < 298673397ea3f6f5811b84f0d9f71eac71dda2e3 (git)
Affected: df542f669307918f054a17878ff6dd1ddbb2fe18 , < 0a7822e34a0bfde31b194ac3da3253e5032b44cc (git)
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Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
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          "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."
        }
      ],
      "providerMetadata": {
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        "shortName": "Linux"
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    "assignerShortName": "Linux",
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    "datePublished": "2026-10-18T15:18:37.195Z",
    "dateReserved": "2026-09-25T10:25:14.357Z",
    "dateUpdated": "2026-10-19T09:21:56.739Z",
    "state": "PUBLISHED"
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        "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",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: net: stmmac: clear stale buf-\u003epage after recycling on skb build failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98571.json",
      "version": "3"
    }
  }
}



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