CVE-2025-37866: mlxbf-bootctl: use sysfs_emit_at() in secure_boot_fuse_state_show()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-09 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: mlxbf-bootctl: use sysfs_emit_at() in secure_boot_fuse_state_show() A warning is seen when running the latest kernel on a BlueField SOC: [251.512704] ------------[ cut here ]------------ [251.512711] invalid sysfs_emit: buf:0000000003aa32ae [251.512720] WARNING: CPU: 1 PID: 705264 at fs/sysfs/file.c:767 sysfs_emit+0xac/0xc8 The warning is triggered because the mlxbf-bootctl driver invokes "sysfs_emit()" with a buffer pointer that is not aligned to the start of the page. The driver should instead use "sysfs_emit_at()" to support non-zero offsets into the destination buffer.

Affected products

Linux kernel: from 6.14 before 6.14.4; 6.15-rc1, 6.15-rc2 — fixed in 6.14.4

How to fix

Upgrade to a fixed version: Linux kernel 6.14.4. Check the vendor advisory for mitigations.

References

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