CVE-2025-68814

Local service interruption via io_uring filename leak

Published Jan 13, 2026 · Updated Jan 13, 2026

Memory leak in the io_uring open path in Linux Kernel allows local users to interrupt service through crafted asynchronous open requests. The __io_openat_prep() function allocates a struct filename with getname(), then returns early for fixed-file installation with O_CLOEXEC before setting REQ_F_NEED_CLEANUP, so request teardown does not release the allocation. Local users able to submit repeated io_uring open requests can consume kernel memory and degrade or interrupt the host, without a reported confidentiality or integrity impact.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
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

Memory leak in the io_uring open path in Linux Kernel allows local users to interrupt service through crafted asynchronous open requests. The __io_openat_prep() function allocates a struct filename with getname(), then returns early for fixed-file installation with O_CLOEXEC before setting REQ_F_NEED_CLEANUP, so request teardown does not release the allocation. Local users able to submit repeated io_uring open requests can consume kernel memory and degrade or interrupt the host, without a reported confidentiality or integrity impact.

The record

CVE
CVE-2025-68814
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=5.15
  2. Affected versionversion=b9445598d8c60a1379887b957024b71343965f74 <18b99fa603d0df5e1c898699c17d3b92ddc80746
  3. Affected versionversion=b9445598d8c60a1379887b957024b71343965f74 <7fbfb85b05bc960cc50e09d03e5e562131e48d45
  4. Affected versionversion=b9445598d8c60a1379887b957024b71343965f74 <8f44c4a550570cd5903625133f938c6b51310c9b
  5. Affected versionversion=b9445598d8c60a1379887b957024b71343965f74 <b14fad555302a2104948feaff70503b64c80ac01
  6. Affected versionversion=b9445598d8c60a1379887b957024b71343965f74 <e232269d511566b1f80872256a48593acc1becf4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.15; version=b9445598d8c60a1379887b957024b71343965f74 <18b99fa603d0df5e1c898699c17d3b92ddc80746; version=b9445598d8c60a1379887b957024b71343965f74 <7fbfb85b05bc960cc50e09d03e5e562131e48d45; version=b9445598d8c60a1379887b957024b71343965f74 <8f44c4a550570cd5903625133f938c6b51310c9b; version=b9445598d8c60a1379887b957024b71343965f74 <b14fad555302a2104948feaff70503b64c80ac01; version=b9445598d8c60a1379887b957024b71343965f74 <e232269d511566b1f80872256a48593acc1becf4

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

T1499.001OS Exhaustion Flood

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