CVE-2026-98028 (GCVE-0-2026-98028)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:23 – Updated: 2026-09-25 10:23
VLAI
Title
eth: nfp: drop the replaced rule from the list when reprogramming fails
Summary
In the Linux kernel, the following vulnerability has been resolved: eth: nfp: drop the replaced rule from the list when reprogramming fails nfp_net_fs_add() replaces an existing rule by deleting it from the hardware, decrementing nn->fs.count and programming the new one. If nfp_net_fs_add_hw() fails the old entry stays on nn->fs.list - only the success path reaches list_replace() - so the list is one longer than nn->fs.count, and it advertises a rule whose hardware entry has already been torn down. nn->fs.count is what ETHTOOL_GRXCLSRLCNT reports, so userspace then sizes its buffer one entry short of what the GRXCLSRLALL walk wants to write. That used to overwrite one u32 past the allocation; since the walk is bounded it is a permanent -EMSGSIZE instead, as nothing ever resyncs the counter.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9eb03bb1c035ff6e2c3a34046419446588253dda , < 603b70093f729f52a37544b48679903cad834856 (git)
Affected: 9eb03bb1c035ff6e2c3a34046419446588253dda , < edaec279f59f801a05b751df475ed71a0a68c88a (git)
Affected: 9eb03bb1c035ff6e2c3a34046419446588253dda , < 552e528a7d85cbe088b2ae4f78194713975b46cf (git)
Affected: 9eb03bb1c035ff6e2c3a34046419446588253dda , < 108bb2142e3a12c9ad625ad662973127a113ddc6 (git)
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Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: nfp: drop the replaced rule from the list when reprogramming fails\n\nnfp_net_fs_add() replaces an existing rule by deleting it from the\nhardware, decrementing nn-\u003efs.count and programming the new one.  If\nnfp_net_fs_add_hw() fails the old entry stays on nn-\u003efs.list - only the\nsuccess path reaches list_replace() - so the list is one longer than\nnn-\u003efs.count, and it advertises a rule whose hardware entry has already\nbeen torn down.\n\nnn-\u003efs.count is what ETHTOOL_GRXCLSRLCNT reports, so userspace then sizes\nits buffer one entry short of what the GRXCLSRLALL walk wants to write.\nThat used to overwrite one u32 past the allocation; since the walk is\nbounded it is a permanent -EMSGSIZE instead, as nothing ever resyncs the\ncounter."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:23:45.737Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/108bb2142e3a12c9ad625ad662973127a113ddc6"
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      "title": "eth: nfp: drop the replaced rule from the list when reprogramming fails",
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    "cveId": "CVE-2026-98028",
    "datePublished": "2026-09-25T10:23:45.737Z",
    "dateReserved": "2026-09-25T10:19:56.070Z",
    "dateUpdated": "2026-09-25T10:23:45.737Z",
    "state": "PUBLISHED"
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      "date": "2026-09-27",
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: nfp: drop the replaced rule from the list when reprogramming fails\n\nnfp_net_fs_add() replaces an existing rule by deleting it from the\nhardware, decrementing nn-\u003efs.count and programming the new one.  If\nnfp_net_fs_add_hw() fails the old entry stays on nn-\u003efs.list - only the\nsuccess path reaches list_replace() - so the list is one longer than\nnn-\u003efs.count, and it advertises a rule whose hardware entry has already\nbeen torn down.\n\nnn-\u003efs.count is what ETHTOOL_GRXCLSRLCNT reports, so userspace then sizes\nits buffer one entry short of what the GRXCLSRLALL walk wants to write.\nThat used to overwrite one u32 past the allocation; since the walk is\nbounded it is a permanent -EMSGSIZE instead, as nothing ever resyncs the\ncounter."
          }
        ],
        "id": "CVE-2026-98028",
        "lastModified": "2026-09-25T11:17:31.447",
        "metrics": {},
        "published": "2026-09-25T11:17:31.447",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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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.
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  • 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.