# CVE-2025-22108

## Summary

- **CVE ID:** CVE-2025-22108
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H)
- **CWE:** N/A
- **Published:** Apr 16, 2025
- **Last Modified:** Sep 7, 2026

## Description

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

bnxt_en: Mask the bd_cnt field in the TX BD properly

The bd_cnt field in the TX BD specifies the total number of BDs for
the TX packet.  The bd_cnt field has 5 bits and the maximum number
supported is 32 with the value 0.

CONFIG_MAX_SKB_FRAGS can be modified and the total number of SKB
fragments can approach or exceed the maximum supported by the chip.
Add a macro to properly mask the bd_cnt field so that the value 32
will be properly masked and set to 0 in the bd_cnd field.

Without this patch, the out-of-range bd_cnt value will corrupt the
TX BD and may cause TX timeout.

The next patch will check for values exceeding 32.

## Affected Products

- Linux — Linux (3948b05950fdd64002a5f182c65ba5cf2d53cf71)
- Linux — Linux (6.4)
- Linux — Linux (0)
- Linux — Linux (6.14.2)
- Linux — Linux (6.15)
- Linux — Linux (6.12.109)

## References

- [CNA](https://git.kernel.org/stable/c/f60b41b815826f15c4d0323f923f398c423178d0)
- [CNA](https://git.kernel.org/stable/c/107b25db61122d8f990987895c2912927b8b6e3f)
- [CNA](https://git.kernel.org/stable/c/9ee185e0f15594017a6f1a191ebe6630cfea5f74)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 29.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._