net: stmmac: Fix accessing freed irq affinity_hint

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-23155
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-05-01 13:15:51 UTC
Updated2026-07-30 06:22:17 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-Other

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e 2fbf67ddb8a0d0efc00d2df496a9843ec318d48b git Not specified
CNA Linux Linux affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e 960dab23f6d405740c537d095f90a4ee9ddd9285 git Not specified
CNA Linux Linux affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e 442312c2a90d60c7a5197246583fa91d9e579985 git Not specified
CNA Linux Linux affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e e148266e104fce396ad624079a6812ac3a9982ef git Not specified
CNA Linux Linux affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e 9e51a6a44e2c4de780a26e8fe110d708e806a8cd git Not specified
CNA Linux Linux affected 8deec94c6040bb4a767f6e9456a0a44c7f2e713e c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef git Not specified
CNA Linux Linux affected 5.13 Not specified
CNA Linux Linux unaffected 5.13 semver Not specified
CNA Linux Linux unaffected 6.1.164 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.117 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.36 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13.12 6.13.* semver Not specified
CNA Linux Linux unaffected 6.14.3 6.14.* semver Not specified
CNA Linux Linux unaffected 6.15 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2fbf67ddb8a0d0efc00d2df496a9843ec318d48b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/960dab23f6d405740c537d095f90a4ee9ddd9285 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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