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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 71ba8b6e28f7a83b724036f5de07e03bb5473286, 950d8e8375f3ff4787de51b7bdf8dd23a3ad6547, a75b84119e56fc34b0f1403f3b93d357a55dabb6.

Low priority for now. Upgrade to Linux Linux 71ba8b6e28f7a83b724036f5de07e03bb5473286, 950d8e8375f3ff4787de51b7bdf8dd23a3ad6547, a75b84119e56fc34b0f1403f3b93d357a55dabb6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.11affected
    • 1a218d312e65ec396b2739056a8ea78493015f21 and later · before 950d8e8375f3ff4787de51b7bdf8dd23a3ad6547affected · git
    • 1a218d312e65ec396b2739056a8ea78493015f21 and later · before fdfb736282b9665c0169df0c4152ec91fdea2767affected · git
    • 1a218d312e65ec396b2739056a8ea78493015f21 and later · before bf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0affected · git
    • 1a218d312e65ec396b2739056a8ea78493015f21 and later · before a75b84119e56fc34b0f1403f3b93d357a55dabb6affected · git
    • 1a218d312e65ec396b2739056a8ea78493015f21 and later · before 71ba8b6e28f7a83b724036f5de07e03bb5473286affected · git
    • 1a218d312e65ec396b2739056a8ea78493015f21 and later · before d25dd08268aeaceb485189aaa84aa6d68a460291affected · git
    • 1a218d312e65ec396b2739056a8ea78493015f21 and later · before c38cce70adef874c2a7b5132c14d6c221401deffaffected · git
    • before 5.11not affected · semver
    • 5.15.221 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-93113Sep 17, 2026 · clk: qcom: camcc-sc8280xp: unregister CAMCC_GDSC_CLK
    0Monitor
  • ← EarlierCVE-2026-93114Sep 17, 2026 · platform/surface: acpi-notify: Check ACPI companion before use
    0Monitor
  • Later →CVE-2026-93116Sep 17, 2026 · platform/x86: asus-wmi: fix resource leaks on probe failure
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux71ba8b6e28f7a83b724036f5de07e03bb5473286Vendor (CNA)
Linux Linux950d8e8375f3ff4787de51b7bdf8dd23a3ad6547Vendor (CNA)
Linux Linuxa75b84119e56fc34b0f1403f3b93d357a55dabb6Vendor (CNA)
Linux Linuxbf1e0cc5cc1d4e71b699fc98cc9198ead0ed53e0Vendor (CNA)
Linux Linuxc38cce70adef874c2a7b5132c14d6c221401deffVendor (CNA)
Linux Linuxd25dd08268aeaceb485189aaa84aa6d68a460291Vendor (CNA)
Linux Linuxfdfb736282b9665c0169df0c4152ec91fdea2767Vendor (CNA)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records