GHSA-c4fx-3whg-2g7mMediumCVSS 5.5
In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Mask the bd_cnt...
🔗 CVE IDs covered (1)
📋 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.
🔗 References (5)
- https://nvd.nist.gov/vuln/detail/CVE-2025-22108
- https://git.kernel.org/stable/c/107b25db61122d8f990987895c2912927b8b6e3f
- https://git.kernel.org/stable/c/f60b41b815826f15c4d0323f923f398c423178d0
- https://git.kernel.org/stable/c/9ee185e0f15594017a6f1a191ebe6630cfea5f74
- https://github.com/advisories/GHSA-c4fx-3whg-2g7m