CVE-2026-90290

Interrupt masking via hibernation error-state restoration failure

Published Sep 17, 2026 · Updated Sep 17, 2026

State restoration failure in Linux arm64 hibernation allows local users to leave interrupts masked via a failed memory-tag save. In arch/arm64/kernel/hibernate.c, swsusp_arch_suspend() returns after swsusp_mte_save_tags() fails without restoring the saved DAIF state. Reaching this path requires arm64 hibernation and a tag-save failure; Amazon Linux assesses high privileges as necessary, while the upstream notice does not specify a crash or hang.

CVSS severity1.9
Low
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

State restoration failure in Linux arm64 hibernation allows local users to leave interrupts masked via a failed memory-tag save. In arch/arm64/kernel/hibernate.c, swsusp_arch_suspend() returns after swsusp_mte_save_tags() fails without restoring the saved DAIF state. Reaching this path requires arm64 hibernation and a tag-save failure; Amazon Linux assesses high privileges as necessary, while the upstream notice does not specify a crash or hang.

The record

CVE
CVE-2026-90290
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=5.10
  2. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <2c941f383a53e188cd6fe3a129eb9b52b298e683
  3. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <519e7de2c4c7b92ef57d4404b7e564aa9be24143
  4. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <541549827889d0380fd73f8aacb5de6ef7a5a1ac
  5. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <77053624d03359a4e2ec47d7106639ec9a498c2b
  6. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <ad3839fe2114bb092846df79edd8d119e148b8c3
  7. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <c8c6835f62a7f9fc68865e85397d13a2dc9210fb
  8. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <cb51a05498e755d900900ff4b8503b4da4325996
  9. Affected versionversion=ee11f332af96a3b5d29586bc6d69b41531f62648 <f5693dfaf28d66e7e880feafd1778d3715869efc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <2c941f383a53e188cd6fe3a129eb9b52b298e683; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <519e7de2c4c7b92ef57d4404b7e564aa9be24143; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <541549827889d0380fd73f8aacb5de6ef7a5a1ac; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <77053624d03359a4e2ec47d7106639ec9a498c2b; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <ad3839fe2114bb092846df79edd8d119e148b8c3; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <c8c6835f62a7f9fc68865e85397d13a2dc9210fb; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <cb51a05498e755d900900ff4b8503b4da4325996; version=ee11f332af96a3b5d29586bc6d69b41531f62648 <f5693dfaf28d66e7e880feafd1778d3715869efc

Published CVSS scores

1.9Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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