CVE-2025-23154

Service interruption via bundled io_uring network sends

Published May 1, 2025 · Updated May 11, 2026

A denial-of-service flaw in the Linux kernel allows local users to interrupt system service through io_uring network bundled sends. The io_uring send path passes a bundled-send request to io_req_post_cqe(), although that helper is reserved for requests permitted to post multiple completion queue entries. A local low-privileged user can reach the path without user interaction; the published trace confirms a kernel warning, but the exact interruption mode is undisclosed.

CVSS severity5.8
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A denial-of-service flaw in the Linux kernel allows local users to interrupt system service through io_uring network bundled sends. The io_uring send path passes a bundled-send request to io_req_post_cqe(), although that helper is reserved for requests permitted to post multiple completion queue entries. A local low-privileged user can reach the path without user interaction; the published trace confirms a kernel warning, but the exact interruption mode is undisclosed.

The record

CVE
CVE-2025-23154
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.10
  2. Affected versionversion=a05d1f625c7aa681d8816bc0f10089289ad07aad <6889ae1b4df1579bcdffef023e2ea9a982565dff
  3. Affected versionversion=a05d1f625c7aa681d8816bc0f10089289ad07aad <7888c9fc0b2d3636f2e821ed1ad3c6920fa8e378
  4. Affected versionversion=a05d1f625c7aa681d8816bc0f10089289ad07aad <9aa804e6b9696998308095fb9d335046a71550f1
  5. Affected versionversion=a05d1f625c7aa681d8816bc0f10089289ad07aad <b7c6d081c19a5e11bbd77bb97a62cff2b6b21cb5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.10; version=a05d1f625c7aa681d8816bc0f10089289ad07aad <6889ae1b4df1579bcdffef023e2ea9a982565dff; version=a05d1f625c7aa681d8816bc0f10089289ad07aad <7888c9fc0b2d3636f2e821ed1ad3c6920fa8e378; version=a05d1f625c7aa681d8816bc0f10089289ad07aad <9aa804e6b9696998308095fb9d335046a71550f1; version=a05d1f625c7aa681d8816bc0f10089289ad07aad <b7c6d081c19a5e11bbd77bb97a62cff2b6b21cb5

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.8CanonicalCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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