Vulnerability-Lookup

GHSA-F9C6-X48G-GFM4

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: cortina: Fix budget accounting

The gmac_rx() function returns the remaining NAPI budget, but its caller treats the return value as the number of packets received. An idle poll therefore reports a full budget and remains scheduled.

Return the number of received packets instead. Preserve the existing free queue refill accounting by adding that count directly; continuing to subtract it from the budget would invert the refill behavior.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-97982"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:26Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: cortina: Fix budget accounting\n\nThe gmac_rx() function returns the remaining NAPI budget, but its\ncaller treats the return value as the number of packets received. An\nidle poll therefore reports a full budget and remains scheduled.\n\nReturn the number of received packets instead. Preserve the existing\nfree queue refill accounting by adding that count directly; continuing\nto subtract it from the budget would invert the refill behavior.",
  "id": "GHSA-f9c6-x48g-gfm4",
  "modified": "2026-09-25T12:31:31Z",
  "published": "2026-09-25T12:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97982"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ef8eaef5806c84db2334111d6f299c246a592bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/631c47e2e1154f2741c555b91df1b8cb99294c6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94e06e12a376710587cfeea481b65e7c49747003"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0de06d0da78a3db53de65dfd7452cc6d111f703"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-97982 (GCVE-0-2026-97982)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:23 – Updated: 2026-09-25 10:23

Title

net: ethernet: cortina: Fix budget accounting

Summary

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: cortina: Fix budget accounting The gmac_rx() function returns the remaining NAPI budget, but its caller treats the return value as the number of packets received. An idle poll therefore reports a full budget and remains scheduled. Return the number of received packets instead. Preserve the existing free queue refill accounting by adding that count directly; continuing to subtract it from the budget would invert the refill behavior.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/631c47e2e1154f274…
https://git.kernel.org/stable/c/0ef8eaef5806c84db…
https://git.kernel.org/stable/c/94e06e12a37671058…
https://git.kernel.org/stable/c/a0de06d0da78a3db5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 , < 631c47e2e1154f2741c555b91df1b8cb99294c6a (git) Affected: 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 , < 0ef8eaef5806c84db2334111d6f299c246a592bc (git) Affected: 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 , < 94e06e12a376710587cfeea481b65e7c49747003 (git) Affected: 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 , < a0de06d0da78a3db53de65dfd7452cc6d111f703 (git)
Linux	Linux	Affected: 4.16 Unaffected: 0 , < 4.16 (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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/cortina/gemini.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "631c47e2e1154f2741c555b91df1b8cb99294c6a",
              "status": "affected",
              "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
              "versionType": "git"
            },
            {
              "lessThan": "0ef8eaef5806c84db2334111d6f299c246a592bc",
              "status": "affected",
              "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
              "versionType": "git"
            },
            {
              "lessThan": "94e06e12a376710587cfeea481b65e7c49747003",
              "status": "affected",
              "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
              "versionType": "git"
            },
            {
              "lessThan": "a0de06d0da78a3db53de65dfd7452cc6d111f703",
              "status": "affected",
              "version": "4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/cortina/gemini.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.16"
            },
            {
              "lessThan": "4.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "4.16",
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                },
                {
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                  "versionEndExcluding": "7.3-rc3",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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        }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: cortina: Fix budget accounting\n\nThe gmac_rx() function returns the remaining NAPI budget, but its\ncaller treats the return value as the number of packets received. An\nidle poll therefore reports a full budget and remains scheduled.\n\nReturn the number of received packets instead. Preserve the existing\nfree queue refill accounting by adding that count directly; continuing\nto subtract it from the budget would invert the refill behavior."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:23:18.304Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        {
          "url": "https://git.kernel.org/stable/c/a0de06d0da78a3db53de65dfd7452cc6d111f703"
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      ],
      "title": "net: ethernet: cortina: Fix budget accounting",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97982",
    "datePublished": "2026-09-25T10:23:18.304Z",
    "dateReserved": "2026-09-25T10:18:58.208Z",
    "dateUpdated": "2026-09-25T10:23:18.304Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-F9C6-X48G-GFM4

CVE-2026-97982 (GCVE-0-2026-97982)

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