CVE-2025-68288 | THREATINT

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.

PUBLISHED Reserved 2025-12-16 | Published 2025-12-16 | Updated 2025-12-16 | Assigner Linux

Product status

Default status

unaffected

a45b599ad808c3c982fdcdc12b0b8611c2f92824 (git) before 83f0241959831586d9b6d47f6bd5d3dec8f43bf0

affected

a45b599ad808c3c982fdcdc12b0b8611c2f92824 (git) before 4ba515dfff7eeca369ab85cdbb3f3b231c71720c

affected

a45b599ad808c3c982fdcdc12b0b8611c2f92824 (git) before 467fec3cefbeb9e3ea80f457da9a5666a71ca0d0

affected

a45b599ad808c3c982fdcdc12b0b8611c2f92824 (git) before cb1401b5bcc2feb5b038fc4b512e5968b016e05e

affected

a45b599ad808c3c982fdcdc12b0b8611c2f92824 (git) before 0f18eac44c5668204bf6eebb01ddb369ac56932b

affected

a45b599ad808c3c982fdcdc12b0b8611c2f92824 (git) before 5b815ddb3f5560fac35b16de3a2a22d5f81c5993

affected

a45b599ad808c3c982fdcdc12b0b8611c2f92824 (git) before 41e99fe2005182139b1058db71f0d241f8f0078c

affected

582802e7c617cfb07cc15f280c128e6decbc57b8 (git)

affected

58b7ce6f9ef2367f86384b20458642945993b816 (git)

affected

93314640426ddb6af618d0802e622f6fa771792c (git)

affected

ad2518320bc440ed3db072e2444a1bb226a9cf7a (git)

affected

d827bea2d18c07ba514f7d48cde49f90da9a1384 (git)

affected

39169410574503c6e901de1aa6eac5108475e017 (git)

affected

Default status

affected

4.17

affected

Any version before 4.17

unaffected

5.10.247 (semver)

unaffected

5.15.197 (semver)

unaffected

6.1.159 (semver)

unaffected

6.6.119 (semver)

unaffected

6.12.61 (semver)

unaffected

6.17.11 (semver)

unaffected

6.18 (original_commit_for_fix)

unaffected

References

git.kernel.org/...c/83f0241959831586d9b6d47f6bd5d3dec8f43bf0

git.kernel.org/...c/4ba515dfff7eeca369ab85cdbb3f3b231c71720c

git.kernel.org/...c/467fec3cefbeb9e3ea80f457da9a5666a71ca0d0

git.kernel.org/...c/cb1401b5bcc2feb5b038fc4b512e5968b016e05e

git.kernel.org/...c/0f18eac44c5668204bf6eebb01ddb369ac56932b

git.kernel.org/...c/5b815ddb3f5560fac35b16de3a2a22d5f81c5993

git.kernel.org/...c/41e99fe2005182139b1058db71f0d241f8f0078c

cve.org (CVE-2025-68288)

nvd.nist.gov (CVE-2025-68288)

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