CVE-2025-40345
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BaseFortify

Publication date: 2025-12-12

Last updated on: 2025-12-15

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: usb: storage: sddr55: Reject out-of-bound new_pba Discovered by Atuin - Automated Vulnerability Discovery Engine. new_pba comes from the status packet returned after each write. A bogus device could report values beyond the block count derived from info->capacity, letting the driver walk off the end of pba_to_lba[] and corrupt heap memory. Reject PBAs that exceed the computed block count and fail the transfer so we avoid touching out-of-range mapping entries.
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Meta Information
Published
2025-12-12
Last Modified
2025-12-15
Generated
2026-05-07
AI Q&A
2025-12-12
EPSS Evaluated
2026-05-05
NVD
CVE-2025-40345
Affected Vendors & Products
Currently, no data is known.
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability occurs in the Linux kernel's USB storage driver for sddr55 devices. A malicious or bogus device can send a status packet with a new_pba value that exceeds the expected block count. This causes the driver to access memory beyond the valid range (walking off the end of pba_to_lba[]), leading to heap memory corruption. The fix involves rejecting any new_pba values that exceed the computed block count to prevent out-of-range memory access.


How can this vulnerability impact me? :

The vulnerability can lead to heap memory corruption in the Linux kernel when interacting with a malicious USB storage device. This could potentially cause system instability, crashes, or be exploited to execute arbitrary code with kernel privileges, compromising system security.


What immediate steps should I take to mitigate this vulnerability?

Update the Linux kernel to a version that includes the fix for rejecting out-of-bound new_pba values in the usb storage sddr55 driver. This prevents the driver from accepting bogus devices that report invalid block addresses, avoiding heap memory corruption.


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