Riskcovery

CVE-2025-22108

bnxt_en: Mask the bd_cnt field in the TX BD properly

State
Published
Severity
8.6 High
Published
Apr 16, 2025
Updated
Sep 7, 2026
Reserved
Dec 29, 2024

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 3948b05950fdd64002a5f182c65ba5cf2d53cf71 to before 9ee185e0f15594017a6f1a191ebe6630cfea5f74Affected
  • 3948b05950fdd64002a5f182c65ba5cf2d53cf71 to before f60b41b815826f15c4d0323f923f398c423178d0Affected
  • 3948b05950fdd64002a5f182c65ba5cf2d53cf71 to before 107b25db61122d8f990987895c2912927b8b6e3fAffected
LinuxLinux
  • 6.4Affected
  • before 6.4Not affected
  • 6.12.109 through 6.12.*Not affected
  • 6.14.2 through 6.14.*Not affected
  • 6.15 and laterNot affected

References

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