CVE-2023-53703
BaseFortify
Publication date: 2025-10-22
Last updated on: 2025-10-22
Assigner: kernel.org
Description
Description
CVSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
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 a shift-out-of-bounds error in the Linux kernel's amd_sfh driver. It occurs because the shift operation on certain variables ('exp' and 'shift') exceeds the maximum allowed shift value for a 32-bit unsigned integer, leading to undefined behavior detected by the Undefined Behavior Sanitizer (UBSAN). The issue is fixed by adding validation to ensure the shift values are within acceptable ranges.
How can this vulnerability impact me? :
The vulnerability can cause undefined behavior in the kernel, potentially leading to system instability or crashes when the affected driver performs invalid shift operations. This could affect system reliability but there is no explicit information about exploitation or further impacts.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by checking the system logs for UBSAN (Undefined Behavior Sanitizer) shift-out-of-bounds errors related to the amd_sfh driver. Look for log entries similar to: '[ 6.120512] UBSAN: shift-out-of-bounds in drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c'. You can use commands like 'dmesg | grep -i ubsan' or 'journalctl -k | grep -i ubsan' to find such messages in the kernel logs.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation involves updating the Linux kernel to a version where this vulnerability is fixed. The fix includes adding validation for shift ranges in the amd_sfh driver to prevent shift-out-of-bounds errors. Until the update is applied, monitoring logs for UBSAN errors and avoiding use of affected hardware or drivers if possible may reduce risk.