CVE-2026-97619Public exploit

Local system hang via deferred write accounting

Published Sep 25, 2026 · Updated Sep 25, 2026

Deadlock in Linux kernel io_uring write handling allows local users to hang the system through concurrent asynchronous I/O and filesystem freezing. The io_complete_rw path defers releasing SB_FREEZE_WRITE protection to io_req_rw_complete task work, while freeze_super blocks that task and queues its next writer acquisition behind the freeze. An unprivileged local user must race an io_uring write completed by an I/O worker with filesystem shutdown or freezing; the resulting circular wait leaves affected tasks stuck in uninterruptible sleep.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 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.

Get started

Summary

What happened

Deadlock in Linux kernel io_uring write handling allows local users to hang the system through concurrent asynchronous I/O and filesystem freezing. The io_complete_rw path defers releasing SB_FREEZE_WRITE protection to io_req_rw_complete task work, while freeze_super blocks that task and queues its next writer acquisition behind the freeze. An unprivileged local user must race an io_uring write completed by an I/O worker with filesystem shutdown or freezing; the resulting circular wait leaves affected tasks stuck in uninterruptible sleep.

The record

CVE
CVE-2026-97619
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=2a853c206e553dd9c0a55c22858fd6a446d93e15
  2. Affected versionversion=5.10.165 <5.11
  3. Affected versionversion=5.15.90 <5.16
  4. Affected versionversion=6.0.3 <6.1
  5. Affected versionversion=6.1
  6. Affected versionversion=89a410dbd0f159ddd308f19d6eb682fc753e4771
  7. Affected versionversion=b000145e9907809406d8164c3b2b8861d95aecd1 <055d43a1233edbd80e558889258105ce63051bcd
  8. Affected versionversion=b000145e9907809406d8164c3b2b8861d95aecd1 <796aa0547557e63338657ed1c487906f9fac4c73
  9. Affected versionversion=b000145e9907809406d8164c3b2b8861d95aecd1 <cc580cee4dfa2ec9099c30ecbd4d804cbb996432
  10. Affected versionversion=ea2e6286e3e89a115ae554e20ba9aec2b2e1ddff

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2a853c206e553dd9c0a55c22858fd6a446d93e15; version=5.10.165 <5.11; version=5.15.90 <5.16; version=6.0.3 <6.1; version=6.1; version=89a410dbd0f159ddd308f19d6eb682fc753e4771; version=b000145e9907809406d8164c3b2b8861d95aecd1 <055d43a1233edbd80e558889258105ce63051bcd; version=b000145e9907809406d8164c3b2b8861d95aecd1 <796aa0547557e63338657ed1c487906f9fac4c73; version=b000145e9907809406d8164c3b2b8861d95aecd1 <cc580cee4dfa2ec9099c30ecbd4d804cbb996432; version=ea2e6286e3e89a115ae554e20ba9aec2b2e1ddff

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.

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

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started