CVE-2026-64101 Details
Description
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.
A vulnerability exists in the Linux kernel's fwctl component, specifically in the handling of device-specific RPC input for the PDS (Packet Data Service) feature. The issue arises because the input buffer is allocated based on the specified length, but the subsequent parsing does not properly validate the buffer size before accessing its contents. This oversight can lead to reading beyond the allocated memory, potentially causing a buffer overflow. The vulnerability affects several versions of the Linux kernel.
The vulnerability has been addressed by adding a validation step to ensure that PDS RPC buffers are not smaller than the 'fwctl_rpc_pds' structure before any fields are parsed. Users should upgrade to the latest version of the Linux kernel where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0d470d36551058e3f728574308b815a80bca710f | kernel.org | Patch |
| https://git.kernel.org/stable/c/9e3f18883a98420a3b8873c6f894bc57e9b98e41 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e7537735028c3ad4b0bfc02ff8fa2a1a28aa04fe | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.15, < 6.18.34 >= 6.19, < 7.0.11 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 11, 2026 | Initial Analysis | [email protected] |
| Jul 19, 2026 | New CVE Received | kernel.org |