Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: storage: Fix memory leak in USB bulk transport A kernel memory leak was identified by the 'ioctl_sg01' test from Linux Test Project (LTP). The following bytes were mainly observed: 0x53425355. When USB storage devices incorrectly skip the data phase with status data, the code extracts/validates the CSW from the sg buffer, but fails to clear it afterwards. This leaves status protocol data in srb's transfer buffer, such as the US_BULK_CS_SIGN 'USBS' signature observed here. Thus, this can lead to USB protocols leaks to user space through SCSI generic (/dev/sg*) interfaces, such as the one seen here when the LTP test requested 512 KiB. Fix the leak by zeroing the CSW data in srb's transfer buffer immediately after the validation of devices that skip data phase. Note: Differently from CVE-2018-1000204, which fixed a big leak by zero- ing pages at allocation time, this leak occurs after allocation, when USB protocol data is written to already-allocated sg pages.
References
- https://git.kernel.org/stable/c/0f18eac44c5668204bf6eebb01ddb369ac56932b
- https://git.kernel.org/stable/c/41e99fe2005182139b1058db71f0d241f8f0078c
- https://git.kernel.org/stable/c/467fec3cefbeb9e3ea80f457da9a5666a71ca0d0
- https://git.kernel.org/stable/c/4ba515dfff7eeca369ab85cdbb3f3b231c71720c
- https://git.kernel.org/stable/c/5b815ddb3f5560fac35b16de3a2a22d5f81c5993
- https://git.kernel.org/stable/c/83f0241959831586d9b6d47f6bd5d3dec8f43bf0
- https://git.kernel.org/stable/c/cb1401b5bcc2feb5b038fc4b512e5968b016e05e
FAQ
What is CVE-2025-68288?
CVE-2025-68288 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: usb: storage: Fix memory leak in USB bulk transport A kernel memory leak was identified by the 'ioctl_sg01' test from Linux Test P...
How severe is CVE-2025-68288?
CVSS scoring is not yet available for CVE-2025-68288. Check NVD for updates.
Is there a patch for CVE-2025-68288?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.