CVE-2025-39694
BaseFortify
Publication date: 2025-09-05
Last updated on: 2025-11-03
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 6.1.153-1 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is in the Linux kernel's s390/sclp subsystem. The tracing code called by the SCLP interrupt handler performs a NULL check on the SCCB address after translating a physical address to a virtual address. However, if the kernel identity mapping does not start at address zero, the virtual address will never be zero, causing the NULL check to fail. This can lead to incorrect accesses to the first page of the identity mapping. The fix involves introducing a function that handles the NULL case before address translation.
How can this vulnerability impact me? :
This vulnerability can cause the kernel to incorrectly access memory, specifically the first page of the identity mapping, due to improper NULL checks. Such incorrect memory accesses could potentially lead to system instability, crashes, or unintended behavior in the kernel's handling of SCLP interrupts.