CVE-2025-68288usb: storage: Fix memory leak in USB bulk transport
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Deferred.
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 – < 83f0241959831586d9b6d47f6bd5d3dec8f43bf0
- affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 – < 4ba515dfff7eeca369ab85cdbb3f3b231c71720c
- affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 – < 467fec3cefbeb9e3ea80f457da9a5666a71ca0d0
- affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 – < cb1401b5bcc2feb5b038fc4b512e5968b016e05e
- affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 – < 0f18eac44c5668204bf6eebb01ddb369ac56932b
- affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 – < 5b815ddb3f5560fac35b16de3a2a22d5f81c5993
- affected a45b599ad808c3c982fdcdc12b0b8611c2f92824 – < 41e99fe2005182139b1058db71f0d241f8f0078c
- affected 582802e7c617cfb07cc15f280c128e6decbc57b8
- affected 58b7ce6f9ef2367f86384b20458642945993b816
- affected 93314640426ddb6af618d0802e622f6fa771792c
- affected ad2518320bc440ed3db072e2444a1bb226a9cf7a
- affected d827bea2d18c07ba514f7d48cde49f90da9a1384
- affected 39169410574503c6e901de1aa6eac5108475e017
- affected 3.16.58 – < 3.17
- affected 3.18.110 – < 3.19
- affected 4.4.133 – < 4.5
- affected 4.9.103 – < 4.10
- affected 4.14.44 – < 4.15
- affected 4.16.12 – < 4.17
- affected 4.17
- unaffected < 4.17
- unaffected 5.10.247 – ≤ 5.10.*
- unaffected 5.15.197 – ≤ 5.15.*
- unaffected 6.1.159 – ≤ 6.1.*
- unaffected 6.6.119 – ≤ 6.6.*
- unaffected 6.12.61 – ≤ 6.12.*
- unaffected 6.17.11 – ≤ 6.17.*
- unaffected 6.18 – ≤ *
References
References7
- https://git.kernel.org/stable/c/83f0241959831586d9b6d47f6bd5d3dec8f43bf0 (opens in a new tab)
- https://git.kernel.org/stable/c/4ba515dfff7eeca369ab85cdbb3f3b231c71720c (opens in a new tab)
- https://git.kernel.org/stable/c/467fec3cefbeb9e3ea80f457da9a5666a71ca0d0 (opens in a new tab)
- https://git.kernel.org/stable/c/cb1401b5bcc2feb5b038fc4b512e5968b016e05e (opens in a new tab)
- https://git.kernel.org/stable/c/0f18eac44c5668204bf6eebb01ddb369ac56932b (opens in a new tab)
- https://git.kernel.org/stable/c/5b815ddb3f5560fac35b16de3a2a22d5f81c5993 (opens in a new tab)
- https://git.kernel.org/stable/c/41e99fe2005182139b1058db71f0d241f8f0078c (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-203792 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-68288)Record last updated .