CVE-2026-63999 (GCVE-0-2026-63999)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:56 – Updated: 2026-07-19 14:56
VLAI
Title
ethtool: rss: fix indir_table and hkey leak on get_rxfh failure
Summary
In the Linux kernel, the following vulnerability has been resolved: ethtool: rss: fix indir_table and hkey leak on get_rxfh failure rss_prepare_get() allocates the indirection table and hash key buffer via rss_get_data_alloc(), then calls ops->get_rxfh() to populate them. If get_rxfh() fails, the function returns an error without freeing the allocation.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4f038a6a02d20859a3479293cbf172b0f14cbdd6 , < 33d05c22d6f227c5ae171c46df2f6f8bf48047ea (git)
Affected: 4f038a6a02d20859a3479293cbf172b0f14cbdd6 , < 80d95d92f828cfcace955d673637d944178b435f (git)
Affected: 4f038a6a02d20859a3479293cbf172b0f14cbdd6 , < 266297692f97008ca48bc311775c087c59bd7fe3 (git)
Affected: 81a5174e64ce4fb7b7a2f6499b835c904c9451ee (git)
Affected: ec9faff49a4ea27731de39cb887b7e590e93157b (git)
Affected: c5ed0eaddcbda56079091fc3876b140a6e70a548 (git)
Affected: a065b996052656a65afc51ad82336dc55ae4c72f (git)
Affected: adee9db710a6117b978a25ed4153846b7c56ec9a (git)
Affected: 5eb3fdc4b6281b29e830300c866a36d90442b1f0 (git)
Affected: 5.15.181 , < 5.16 (semver)
Affected: 6.1.135 , < 6.2 (semver)
Affected: 6.6.88 , < 6.7 (semver)
Affected: 6.12.24 , < 6.13 (semver)
Affected: 6.13.12 , < 6.14 (semver)
Affected: 6.14.3 , < 6.15 (semver)
Create a notification for this product.
Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nethtool: rss: fix indir_table and hkey leak on get_rxfh failure\n\nrss_prepare_get() allocates the indirection table and hash key buffer\nvia rss_get_data_alloc(), then calls ops-\u003eget_rxfh() to populate them.\nIf get_rxfh() fails, the function returns an error without freeing\nthe allocation."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:56:17.383Z",
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        "shortName": "Linux"
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    "datePublished": "2026-07-19T14:56:17.383Z",
    "dateReserved": "2026-07-19T07:54:57.026Z",
    "dateUpdated": "2026-07-19T14:56:17.383Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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      "date": "2026-07-21",
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    },
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      "version": "1"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-21T15:08:21+00:00",
      "cve": "CVE-2026-63999",
      "id": "CVE-2026-63999",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ethtool: rss: fix indir_table and hkey leak on get_rxfh failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63999.json",
      "version": "3"
    }
  }
}



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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.
  • 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.


Detection rules are retrieved from Rulezet.