CVE-2025-38422
Description
From CVE.org
In the Linux kernel, the following vulnerability has been resolved: net: lan743x: Modify the EEPROM and OTP size for PCI1xxxx devices Maximum OTP and EEPROM size for hearthstone PCI1xxxx devices are 8 Kb and 64 Kb respectively. Adjust max size definitions and return correct EEPROM length based on device. Also prevent out-of-bound read/write.
Statement
A vulnerability in the lan743x Ethernet driver allowed out-of-bounds read/write access to EEPROM and OTP memory on Microchip PCI1xxxx-based devices due to improper bounds checking. This could lead to system instability or denial of service when exploited by a privileged local attacker. The vulnerability is mitigated by introducing correct size limits and validating access ranges.
Privileges Required: High, as the attacker needs administrative access (e.g., via ethtool). The vulnerability is only relevant on systems using the lan743x driver with PCI1xxxx devices.
Privileges Required is set to High because triggering the vulnerability requires administrative access, such as root privileges, to execute ethtool operations or access ioctl interfaces capable of invoking EEPROM or OTP read/write routines within the lan743x driver.
Not actual for the Red Hat Enterprise Linux (all versions), so not affected.
Mitigation
Support for the Microchip LAN743x and PCI11x1x families of PCI is disabled for all versions of Red Hat Enterprise Linux, so mitigation not required.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.4 | 7.8 | 7.8 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | High | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | High | High |
| Integrity Impact | None | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
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