CVE-2026-64101 (GCVE-0-2026-64101)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-19 15:40
VLAI
Title
fwctl: pds: Validate RPC input size before parsing
Summary
In the Linux kernel, the following vulnerability has been resolved: fwctl: pds: Validate RPC input size before parsing The fwctl core allocates the device-specific RPC input buffer with fwctl_rpc.in_len and passes that buffer to the driver callback. pdsfc_fw_rpc() casts the buffer to struct fwctl_rpc_pds and then calls pdsfc_validate_rpc(), which reads fields from that structure before checking that the input buffer is large enough to contain it. A short in_len can make pds_fwctl read beyond the allocation. Reject pds RPC buffers that are smaller than struct fwctl_rpc_pds before parsing any pds-specific fields.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 92c66ee829b99a860a90f62ef16df3e42f92edac , < 9e3f18883a98420a3b8873c6f894bc57e9b98e41 (git)
Affected: 92c66ee829b99a860a90f62ef16df3e42f92edac , < 0d470d36551058e3f728574308b815a80bca710f (git)
Affected: 92c66ee829b99a860a90f62ef16df3e42f92edac , < e7537735028c3ad4b0bfc02ff8fa2a1a28aa04fe (git)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfwctl: pds: Validate RPC input size before parsing\n\nThe fwctl core allocates the device-specific RPC input buffer with\nfwctl_rpc.in_len and passes that buffer to the driver callback.\n\npdsfc_fw_rpc() casts the buffer to struct fwctl_rpc_pds and then calls\npdsfc_validate_rpc(), which reads fields from that structure before\nchecking that the input buffer is large enough to contain it. A short\nin_len can make pds_fwctl read beyond the allocation.\n\nReject pds RPC buffers that are smaller than struct fwctl_rpc_pds before\nparsing any pds-specific fields."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:40:06.185Z",
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        "shortName": "Linux"
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    "dateReserved": "2026-07-19T07:54:57.033Z",
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-21T09:07:57+00:00",
      "cve": "CVE-2026-64101",
      "id": "CVE-2026-64101",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "1",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fwctl: pds: Validate RPC input size before parsing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64101.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.
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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.


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