CVE-2025-23155

Kernel data disclosure or panic via dangling cpumask

Published May 1, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux stmmac PCI MSI path allows local users to leak kernel data or panic the system through procfs. stmmac_request_irq_multi_msi passes its stack-local cpu_mask to irq_set_affinity_hint, which retains the pointer after the function returns. Only platforms using stmmac with PCI MSI are affected; reading the world-readable affinity hint can expose reused kernel memory or trigger an oops or panic.

CVSS severity7.1
High
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

Use-after-free in the Linux stmmac PCI MSI path allows local users to leak kernel data or panic the system through procfs. stmmac_request_irq_multi_msi passes its stack-local cpu_mask to irq_set_affinity_hint, which retains the pointer after the function returns. Only platforms using stmmac with PCI MSI are affected; reading the world-readable affinity hint can expose reused kernel memory or trigger an oops or panic.

The record

CVE
CVE-2025-23155
Published
May 1, 2025
Updated
Aug 5, 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. Aug 5, 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=5.13
  2. Affected versionversion=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <2fbf67ddb8a0d0efc00d2df496a9843ec318d48b
  3. Affected versionversion=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <442312c2a90d60c7a5197246583fa91d9e579985
  4. Affected versionversion=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <960dab23f6d405740c537d095f90a4ee9ddd9285
  5. Affected versionversion=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <9e51a6a44e2c4de780a26e8fe110d708e806a8cd
  6. Affected versionversion=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef
  7. Affected versionversion=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <e148266e104fce396ad624079a6812ac3a9982ef

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.13; version=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <2fbf67ddb8a0d0efc00d2df496a9843ec318d48b; version=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <442312c2a90d60c7a5197246583fa91d9e579985; version=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <960dab23f6d405740c537d095f90a4ee9ddd9285; version=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <9e51a6a44e2c4de780a26e8fe110d708e806a8cd; version=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef; version=8deec94c6040bb4a767f6e9456a0a44c7f2e713e <e148266e104fce396ad624079a6812ac3a9982ef

Published CVSS scores

7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
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

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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