CVE-2025-22046

Service interruption via missing trampoline rejection

Published Apr 16, 2025 · Updated May 11, 2026

Improper caller validation in the Linux kernel allows local users to interrupt service through the x86 uretprobe syscall. When no uretprobe trampoline is installed, trampoline_check_ip offsets the negative sentinel address into the low address space instead of rejecting the syscall caller. A low-privileged local process must map executable code at that normally blocked address; the published record does not specify whether interruption occurs as a crash or hang.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper caller validation in the Linux kernel allows local users to interrupt service through the x86 uretprobe syscall. When no uretprobe trampoline is installed, trampoline_check_ip offsets the negative sentinel address into the low address space instead of rejecting the syscall caller. A low-privileged local process must map executable code at that normally blocked address; the published record does not specify whether interruption occurs as a crash or hang.

The record

CVE
CVE-2025-22046
Published
Apr 16, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 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=6.11
  2. Affected versionversion=ff474a78cef5cb5f32be52fe25b78441327a2e7c <b0065d712049c87e1994c6eac00c6a637e39b325
  3. Affected versionversion=ff474a78cef5cb5f32be52fe25b78441327a2e7c <c35771342e47d58ab9433f3be1c3c30f2c5fa4f3
  4. Affected versionversion=ff474a78cef5cb5f32be52fe25b78441327a2e7c <d4e48b8d59fe162938a5004ace698c847e6a3207
  5. Affected versionversion=ff474a78cef5cb5f32be52fe25b78441327a2e7c <fa6192adc32f4fdfe5b74edd5b210e12afd6ecc0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=ff474a78cef5cb5f32be52fe25b78441327a2e7c <b0065d712049c87e1994c6eac00c6a637e39b325; version=ff474a78cef5cb5f32be52fe25b78441327a2e7c <c35771342e47d58ab9433f3be1c3c30f2c5fa4f3; version=ff474a78cef5cb5f32be52fe25b78441327a2e7c <d4e48b8d59fe162938a5004ace698c847e6a3207; version=ff474a78cef5cb5f32be52fe25b78441327a2e7c <fa6192adc32f4fdfe5b74edd5b210e12afd6ecc0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

T1499Endpoint Denial of Service

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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