CVE-2025-23155

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985	Patch
https://git.kernel.org/stable/c/960dab23f6d405740c537d095f90a4ee9ddd9285
https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd	Patch
https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef	Patch
https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2025-05-01 13:15

Updated : 2025-11-24 10:16

NVD link : CVE-2025-23155

Mitre link : CVE-2025-23155

CVE.ORG link : CVE-2025-23155

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-Other

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