Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.13, < 6.12.36 |
References
- https://git.kernel.org/stable/c/2fbf67ddb8a0d0efc00d2df496a9843ec318d48bPatch
- https://git.kernel.org/stable/c/442312c2a90d60c7a5197246583fa91d9e579985Patch
- https://git.kernel.org/stable/c/960dab23f6d405740c537d095f90a4ee9ddd9285Patch
- https://git.kernel.org/stable/c/9e51a6a44e2c4de780a26e8fe110d708e806a8cdPatch
- https://git.kernel.org/stable/c/c60d101a226f18e9a8f01bb4c6ca2b47dfcb15efPatch
- https://git.kernel.org/stable/c/e148266e104fce396ad624079a6812ac3a9982efPatch
FAQ
What is CVE-2025-23155?
CVE-2025-23155 is a vulnerability with a CVSS score of 5.5 (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 ...
How severe is CVE-2025-23155?
CVE-2025-23155 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-23155?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.