Bug 2421798 (CVE-2025-40345)

Summary: CVE-2025-40345 kernel: usb: storage: sddr55: Reject out-of-bound new_pba
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-12 18:01:50 UTC 
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.
Comment 1 Jon Moroney 2025-12-12 21:58:26 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121248-CVE-2025-40345-1796@gregkh/T