usb: storage: Fix memory leak in USB bulk transport
Summary
| CVE | CVE-2025-68288 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-12-16 16:16:07 UTC |
| Updated | 2026-10-13 19:10:00 UTC |
| 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. |
Risk And Classification
EPSS: 0.002050000 probability, percentile 0.097390000 (date 2026-10-13)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 83f0241959831586d9b6d47f6bd5d3dec8f43bf0 git | Not specified |
| CNA | Linux | Linux | affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 4ba515dfff7eeca369ab85cdbb3f3b231c71720c git | Not specified |
| CNA | Linux | Linux | affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 467fec3cefbeb9e3ea80f457da9a5666a71ca0d0 git | Not specified |
| CNA | Linux | Linux | affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 cb1401b5bcc2feb5b038fc4b512e5968b016e05e git | Not specified |
| CNA | Linux | Linux | affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 0f18eac44c5668204bf6eebb01ddb369ac56932b git | Not specified |
| CNA | Linux | Linux | affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 5b815ddb3f5560fac35b16de3a2a22d5f81c5993 git | Not specified |
| CNA | Linux | Linux | affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 41e99fe2005182139b1058db71f0d241f8f0078c git | Not specified |
| CNA | Linux | Linux | affected 582802e7c617cfb07cc15f280c128e6decbc57b8 git | Not specified |
| CNA | Linux | Linux | affected 58b7ce6f9ef2367f86384b20458642945993b816 git | Not specified |
| CNA | Linux | Linux | affected 93314640426ddb6af618d0802e622f6fa771792c git | Not specified |
| CNA | Linux | Linux | affected ad2518320bc440ed3db072e2444a1bb226a9cf7a git | Not specified |
| CNA | Linux | Linux | affected d827bea2d18c07ba514f7d48cde49f90da9a1384 git | Not specified |
| CNA | Linux | Linux | affected 39169410574503c6e901de1aa6eac5108475e017 git | Not specified |
| CNA | Linux | Linux | affected 3.16.58 3.17 semver | Not specified |
| CNA | Linux | Linux | affected 3.18.110 3.19 semver | Not specified |
| CNA | Linux | Linux | affected 4.4.133 4.5 semver | Not specified |
| CNA | Linux | Linux | affected 4.9.103 4.10 semver | Not specified |
| CNA | Linux | Linux | affected 4.14.44 4.15 semver | Not specified |
| CNA | Linux | Linux | affected 4.16.12 4.17 semver | Not specified |
| CNA | Linux | Linux | affected 4.17 | Not specified |
| CNA | Linux | Linux | unaffected 4.17 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.247 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.197 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.159 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.119 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.61 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.17.11 6.17.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/41e99fe2005182139b1058db71f0d241f8f0078c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4ba515dfff7eeca369ab85cdbb3f3b231c71720c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5b815ddb3f5560fac35b16de3a2a22d5f81c5993 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/467fec3cefbeb9e3ea80f457da9a5666a71ca0d0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/83f0241959831586d9b6d47f6bd5d3dec8f43bf0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0f18eac44c5668204bf6eebb01ddb369ac56932b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cb1401b5bcc2feb5b038fc4b512e5968b016e05e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.