CVE-2025-38559
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-08-19

Last updated on: 2025-11-28

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: platform/x86/intel/pmt: fix a crashlog NULL pointer access Usage of the intel_pmt_read() for binary sysfs, requires a pcidev. The current use of the endpoint value is only valid for telemetry endpoint usage. Without the ep, the crashlog usage causes the following NULL pointer exception: BUG: kernel NULL pointer dereference, address: 0000000000000000 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:intel_pmt_read+0x3b/0x70 [pmt_class] Code: Call Trace: <TASK> ? sysfs_kf_bin_read+0xc0/0xe0 kernfs_fop_read_iter+0xac/0x1a0 vfs_read+0x26d/0x350 ksys_read+0x6b/0xe0 __x64_sys_read+0x1d/0x30 x64_sys_call+0x1bc8/0x1d70 do_syscall_64+0x6d/0x110 Augment struct intel_pmt_entry with a pointer to the pcidev to avoid the NULL pointer exception.
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Meta Information
Published
2025-08-19
Last Modified
2025-11-28
Generated
2026-05-27
AI Q&A
2025-08-19
EPSS Evaluated
2026-05-25
NVD
CVE-2025-38559
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.12 (inc) to 6.12.42 (exc)
linux linux_kernel From 6.13 (inc) to 6.15.10 (exc)
linux linux_kernel From 6.16 (inc) to 6.16.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a NULL pointer dereference in the Linux kernel's intel_pmt_read() function related to platform/x86/intel/pmt. The function requires a pcidev pointer, but in some cases, this pointer is missing, causing a crash (NULL pointer exception) when the function is used for crashlog binary sysfs reading. The fix involves augmenting the intel_pmt_entry structure with a pointer to the pcidev to prevent this NULL pointer dereference.


How can this vulnerability impact me? :

This vulnerability can cause the Linux kernel to crash due to a NULL pointer dereference, leading to system instability or denial of service. Specifically, attempts to read certain telemetry or crashlog data via sysfs could trigger this kernel crash, potentially disrupting system operations.


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