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CVE-2026-93115— platform/mellanox: mlxbf-pmc: Check ACPI_COMPANION() against NULL

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： 平台/Mellanox：mlxbf-pmc：对 ACPI_COMPANION() 进行 NULL 检查 由于 可以强制任何平台驱动匹配一个与其设备 ID 列表不匹配的设备，因此依赖设备 ACPI 伴生对象（companion object）存在的平台驱动，必须验证该对象是否存在。 函数将 的结果传递给 ，而后者会对其进行解引用（dereference）。因此，如果强制将驱动绑定到一个没有 ACPI 伴生对象（即伴生对象为 NULL）的设备，就会触发空指针解引用错误。 为此，

AI Predicted 5.5 Difficulty: Hard EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1082 · System Information Discovery

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 1a218d312e65ec396b2739056a8ea78493015f21< 950d8e8375f3ff4787de51b7bdf8dd23a3ad6547 affected
1a218d312e65ec396b2739056a8ea78493015f21< fdfb736282b9665c0169df0c4152ec91fdea2767 affected
1a218d312e65ec396b2739056a8ea78493015f21< bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0 affected
1a218d312e65ec396b2739056a8ea78493015f21< a75b84119e56fc34b0f1403f3b93d357a55dabb6 affected
1a218d312e65ec396b2739056a8ea78493015f21< 71ba8b6e28f7a83b724036f5de07e03bb5473286 affected
1a218d312e65ec396b2739056a8ea78493015f21< d25dd08268aeaceb485189aaa84aa6d68a460291 affected
1a218d312e65ec396b2739056a8ea78493015f21< c38cce70adef874c2a7b5132c14d6c221401deff affected
5.11 affected
… +8 more rows
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I. Basic Information for CVE-2026-93115

Vulnerability Information
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Vulnerability Title
platform/mellanox: mlxbf-pmc: Check ACPI_COMPANION() against NULL
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1a218d312e65ec396b2739056a8ea78493015f21 ~ 950d8e8375f3ff4787de51b7bdf8dd23a3ad6547 -
Linux Linux 5.11 -

II. Public POCs for CVE-2026-93115

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III. Intelligence Information for CVE-2026-93115

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Patches & Fixes for CVE-2026-93115 (7)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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