CVE-2026-98832Hinoki check available

I/O hang via incorrect interrupt-state restoration

Published Oct 18, 2026 · Updated Oct 18, 2026

Deadlock in Linux 7.2 blk-cgroup allows attackers to hang block I/O via a lookup that incorrectly re-enables interrupts. On a blkg lookup miss, blkg_tryget_closest() releases queue_lock with spin_unlock_irq(), enabling interrupts even when its caller had disabled them. With dm-thin's pool lock still held, an I/O completion softirq can reacquire that lock and deadlock; required attacker privileges and a deliberate triggering procedure are not documented.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Deadlock in Linux 7.2 blk-cgroup allows attackers to hang block I/O via a lookup that incorrectly re-enables interrupts. On a blkg lookup miss, blkg_tryget_closest() releases queue_lock with spin_unlock_irq(), enabling interrupts even when its caller had disabled them. With dm-thin's pool lock still held, an I/O completion softirq can reacquire that lock and deadlock; required attacker privileges and a deliberate triggering procedure are not documented.

The record

CVE
CVE-2026-98832
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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?

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  1. Affected versionversion=7.2
  2. Affected versionversion=9327a865e395a53f67dffac4710beb1d4730495e <327c428ba79b13e4cc5253333a9d5c0aa5579bdf
  3. Affected versionversion=9327a865e395a53f67dffac4710beb1d4730495e <9fcf4317384ce6758c3127a6e8914c54cbb9c8cc

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=7.2; version=9327a865e395a53f67dffac4710beb1d4730495e <327c428ba79b13e4cc5253333a9d5c0aa5579bdf; version=9327a865e395a53f67dffac4710beb1d4730495e <9fcf4317384ce6758c3127a6e8914c54cbb9c8cc

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.

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)
VectorUnavailable
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

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Your stack

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