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NVD / CVE Program· CNA Linux

CVE-2026-90388: iommu/dma: Check atomic pool allocation result directly

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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 06dffc96693083dda3412311406e558cf27f1574, 5.9, 8c486293ddd0af60991408149fc3e964ea888dc4; 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 06dffc96693083dda3412311406e558cf27f1574, 5.9, 8c486293ddd0af60991408149fc3e964ea888dc4; 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: iommu/dma: Check atomic pool allocation result directly The non-blocking, non-coherent allocation path uses dma_alloc_from_pool(), which returns the allocated page and fills cpu_addr only on success. Do not rely on cpu_addr to detect allocation failure in this path. Check the returned page directly before using it for the IOMMU mapping.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
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.

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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

    • 47184b9ddf184cc9a77cf441943a0fe9b7afa575, 5.9affected
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before ac9cd0a669b8be5d178dbd471b0d68039dac58b5affected · git
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before db46cb9da83a507d86d2bb080bdb09c865da3d0aaffected · git
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before d56c3f955b21e5764c1497e295a5b5d0b3a40470affected · git
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before 06dffc96693083dda3412311406e558cf27f1574affected · git
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before a4ace31d732b657d774e31fb444c0c27d42c78e5affected · git
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before fb0b39287ba894dbdfac2901c51788b63f5c2291affected · git
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before 8c486293ddd0af60991408149fc3e964ea888dc4affected · git
    • 9420139f516d7fbc248ce17f35275cb005ed98ea and later · before af95a0ebc0a0db0762be75f51eadf770bad01aaaaffected · git
    • 5.8.6 and later · before 5.9affected · 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-2026-90386Sep 17, 2026 · i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices
    0Monitor
  • ← EarlierCVE-2026-90387Sep 17, 2026 · swiotlb: Preserve allocation virtual address for dynamic pools
    31Monitor
  • Later →CVE-2026-90389Sep 17, 2026 · md: scope memalloc_noio to allocation critical sections
    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 Linux06dffc96693083dda3412311406e558cf27f1574Vendor (CNA)
Linux Linux5.9Vendor (CNA)
Linux Linux8c486293ddd0af60991408149fc3e964ea888dc4Vendor (CNA)
Linux Linuxa4ace31d732b657d774e31fb444c0c27d42c78e5Vendor (CNA)
Linux Linuxac9cd0a669b8be5d178dbd471b0d68039dac58b5Vendor (CNA)
Linux Linuxaf95a0ebc0a0db0762be75f51eadf770bad01aaaVendor (CNA)
Linux Linuxd56c3f955b21e5764c1497e295a5b5d0b3a40470Vendor (CNA)
Linux Linuxdb46cb9da83a507d86d2bb080bdb09c865da3d0aVendor (CNA)
Linux Linuxfb0b39287ba894dbdfac2901c51788b63f5c2291Vendor (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
high · data or configuration can be modified
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
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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