CVE-2025-68288
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).
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
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.
- CVSS
- Not yet scored
- EPSS
- 0.21% probability · 10th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.