CVE-2026-80620

Kernel warning via duplicate MSI-X region unmap

Published Aug 28, 2026 · Updated Aug 28, 2026

Improper resource cleanup in affected Linux kernel versions allows local users to trigger a kernel warning during MSI-X setup. When msix_setup_interrupts() fails, automatic cleanup unmaps dev->msix_base and sets it to NULL; msix_capability_init() then calls iounmap() again on that NULL pointer. Reachability requires an MSI-X interrupt-allocation failure on affected hardware; the published reproduction established a warning but no stronger impact.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper resource cleanup in affected Linux kernel versions allows local users to trigger a kernel warning during MSI-X setup. When msix_setup_interrupts() fails, automatic cleanup unmaps dev->msix_base and sets it to NULL; msix_capability_init() then calls iounmap() again on that NULL pointer. Reachability requires an MSI-X interrupt-allocation failure on affected hardware; the published reproduction established a warning but no stronger impact.

The record

CVE
CVE-2026-80620
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=19bf27b450fcd5309bacd614b12bd7de1ac6535b
  2. Affected versionversion=1a8d4c6ecb4c81261bcdf13556abd4a958eca202 <3691a82be2095abaf3326a1cbf7b25858a1d959c
  3. Affected versionversion=1a8d4c6ecb4c81261bcdf13556abd4a958eca202 <f64e03da0d83cb173743888bff4a7e61476a8fc2
  4. Affected versionversion=4a7589b615a3db6792d36b874add86cd22188c95 <82e120a7dd566c476ba923d30e3fb78e8118a1dd
  5. Affected versionversion=5f007c6acaa7d9a543b492c1e48c48a0ea1d7147 <6848ca381edff84f87dd1b6973848c271541e813
  6. Affected versionversion=6.1.165 <6.1.178
  7. Affected versionversion=6.12.75 <6.12.97
  8. Affected versionversion=6.18.16 <6.18.40
  9. Affected versionversion=6.19.6 <6.20
  10. Affected versionversion=6.6.128 <6.6.145
  11. Affected versionversion=7.0
  12. Affected versionversion=76f7abd4ee0188f06465bdd3c053fdc5e8595152 <0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f
  13. Affected versionversion=aee8db5f048616990dbdefcc25689ade0a2620ec <f79519f636059b007d6abc91652f36dea4f54a20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=19bf27b450fcd5309bacd614b12bd7de1ac6535b; version=1a8d4c6ecb4c81261bcdf13556abd4a958eca202 <3691a82be2095abaf3326a1cbf7b25858a1d959c; version=1a8d4c6ecb4c81261bcdf13556abd4a958eca202 <f64e03da0d83cb173743888bff4a7e61476a8fc2; version=4a7589b615a3db6792d36b874add86cd22188c95 <82e120a7dd566c476ba923d30e3fb78e8118a1dd; version=5f007c6acaa7d9a543b492c1e48c48a0ea1d7147 <6848ca381edff84f87dd1b6973848c271541e813; version=6.1.165 <6.1.178; version=6.12.75 <6.12.97; version=6.18.16 <6.18.40; version=6.19.6 <6.20; version=6.6.128 <6.6.145; version=7.0; version=76f7abd4ee0188f06465bdd3c053fdc5e8595152 <0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f; version=aee8db5f048616990dbdefcc25689ade0a2620ec <f79519f636059b007d6abc91652f36dea4f54a20

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo