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CVE-2026-93115

Unknown

Description

In the Linux kernel, the following vulnerability has been resolved: platform/mellanox: mlxbf-pmc: Check ACPI_COMPANION() against NULL Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. mlxbf_pmc_probe() passes the result of ACPI_COMPANION() to acpi_device_hid(), which dereferences it, so force-binding the driver to a device without an ACPI companion leads to a NULL pointer dereference. Accordingly, add a requisite ACPI_COMPANION() check against NULL to the mlxbf-pmc driver and return -ENODEV when the companion is missing.

SeverityUnknown
CVSS—
Exploit probability—
ProductLinux
PublishedSep 17, 2026
First seenSep 17, 2026

How to fix

Update
  • Linux Linux950d8e8375f3ff4787de51b7bdf8dd23a3ad6547, fdfb736282b9665c0169df0c4152ec91fdea2767, bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0, a75b84119e56fc34b0f1403f3b93d357a55dabb6, 71ba8b6e28f7a83b724036f5de07e03bb5473286, d25dd08268aeaceb485189aaa84aa6d68a460291, c38cce70adef874c2a7b5132c14d6c221401deff or later

Affected products

ProductAffected versionsFixed in
Linux Linux1a218d312e65ec396b2739056a8ea78493015f21 ≤ v < 950d8e8375f3ff4787de51b7bdf8dd23a3ad6547, 1a218d312e65ec396b2739056a8ea78493015f21 ≤ v < fdfb736282b9665c0169df0c4152ec91fdea2767, 1a218d312e65ec396b2739056a8ea78493015f21 ≤ v < bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0, 1a218d312e65ec396b2739056a8ea78493015f21 ≤ v < a75b84119e56fc34b0f1403f3b93d357a55dabb6, 1a218d312e65ec396b2739056a8ea78493015f21 ≤ v < 71ba8b6e28f7a83b724036f5de07e03bb5473286, 1a218d312e65ec396b2739056a8ea78493015f21 ≤ v < d25dd08268aeaceb485189aaa84aa6d68a460291, 1a218d312e65ec396b2739056a8ea78493015f21 ≤ v < c38cce70adef874c2a7b5132c14d6c221401deff, 5.11950d8e8375f3ff4787de51b7bdf8dd23a3ad6547, fdfb736282b9665c0169df0c4152ec91fdea2767, bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0, a75b84119e56fc34b0f1403f3b93d357a55dabb6, 71ba8b6e28f7a83b724036f5de07e03bb5473286, d25dd08268aeaceb485189aaa84aa6d68a460291, c38cce70adef874c2a7b5132c14d6c221401deff

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