CVE-2025-23155

Medium

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix accessing freed irq affinity_hint In stmmac_request_irq_multi_msi(), a pointer to the stack variable cpu_mask is passed to irq_set_affinity_hint(). This value is stored in irq_desc->affinity_hint, but once stmmac_request_irq_multi_msi() returns, the pointer becomes dangling. The affinity_hint is exposed via procfs with S_IRUGO permissions, allowing any unprivileged process to read it. Accessing this stale pointer can lead to: - a kernel oops or panic if the referenced memory has been released and unmapped, or - leakage of kernel data into userspace if the memory is re-used for other purposes. All platforms that use stmmac with PCI MSI (Intel, Loongson, etc) are affected.

Package Linux Kernel
Published 2025-05-01
Last modified 2026-03-17
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.13 and later are affected. Fixed in 6.1.164, 6.6.117, 6.12.36, 6.13.12, 6.14.3, 6.15 and their respective stable series.

Affected from
≥ 5.13
Fixed in
✓ 6.1.164 6.1.x ✓ 6.6.117 6.6.x ✓ 6.12.36 6.12.x ✓ 6.13.12 6.13.x ✓ 6.14.3 6.14.x ✓ 6.15

References

The following references provide additional information about CVE-2025-23155 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

6 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2025-23155?

    CVE-2025-23155 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.13 onward and has been patched in 6.1.164, 6.6.117, 6.12.36 and others. CVE-2025-23155 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2025-23155?

    CVE-2025-23155 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2025-23155?

    Yes — CVE-2025-23155 has been patched. Fixed versions include 6.1.164, 6.6.117, 6.12.36 and others. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-23155 actively exploited?

    No — CVE-2025-23155 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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