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NVD / CVE Program· CNA Linux

CVE-2026-93178: drm/amdgpu/pm/powerplay: bounds-check voltage index in SMU7 lookup

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1664327ce797e09e387dc10cbbaa5b8d76558d2c, 3a8a05477cda6c8293e2b629495b42981dcaba32, 6f08c001fa6e8212930d694540ae8d9d6d3fb58a; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 1664327ce797e09e387dc10cbbaa5b8d76558d2c, 3a8a05477cda6c8293e2b629495b42981dcaba32, 6f08c001fa6e8212930d694540ae8d9d6d3fb58a; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: drm/amdgpu/pm/powerplay: bounds-check voltage index in SMU7 lookup vddInd and vddcInd fields from VBIOS-parsed tables are used to index into voltage lookup tables without a bounds check. Return -EINVAL when any index is out of range.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 5th percentile
CWE
—

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-93178

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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

    • 4.5affected
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before d9ef085114d1e3c2c1f869c0bdb275a7b358ce8baffected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 6f08c001fa6e8212930d694540ae8d9d6d3fb58aaffected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before ce0d8e72836c9d3710a160ad848b0f1d096075e3affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 745297208d31222f916cc04da313cb737b997935affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before f925d317d84d401d642e537ea18ee12f67cb6983affected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 8a3db9f593b643904c6cc6d8a3f211c84ca6cf8aaffected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 1664327ce797e09e387dc10cbbaa5b8d76558d2caffected · git
    • c82baa28184356a75c0157129f88af42b2e7b695 and later · before 3a8a05477cda6c8293e2b629495b42981dcaba32affected · git
    • before 4.5not 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-2026-93176Sep 17, 2026 · drm/amd/display: Fix dangling pointer in plane reset function
    28Monitor
  • ← EarlierCVE-2026-93177Sep 17, 2026 · drm/amdgpu/pm/powerplay: bounds-check voltage index in Vega10 lookup
    29Monitor
  • Later →CVE-2026-93179Sep 17, 2026 · drm/amd/powerplay: fix VoltageObjectInfo zero-stride loop and OOB read
    0Monitor

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 Linux1664327ce797e09e387dc10cbbaa5b8d76558d2cVendor (CNA)
Linux Linux3a8a05477cda6c8293e2b629495b42981dcaba32Vendor (CNA)
Linux Linux6f08c001fa6e8212930d694540ae8d9d6d3fb58aVendor (CNA)
Linux Linux745297208d31222f916cc04da313cb737b997935Vendor (CNA)
Linux Linux8a3db9f593b643904c6cc6d8a3f211c84ca6cf8aVendor (CNA)
Linux Linuxce0d8e72836c9d3710a160ad848b0f1d096075e3Vendor (CNA)
Linux Linuxd9ef085114d1e3c2c1f869c0bdb275a7b358ce8bVendor (CNA)
Linux Linuxf925d317d84d401d642e537ea18ee12f67cb6983Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

nvd-secondary

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 (7 more)

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

All records