Unknown

CVE-2025-68288 — usb: storage: Fix memory leak in USB bulk transport

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 Dec 16, 2025 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.21%

ahead of 10% of scored CVEs · Oct 14, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	version ad2518320bc440ed3db072e2444a1bb226a9cf7aversion 4.17≥ 4.16.12 and < 4.17≥ 4.14.44 and < 4.15≥ 4.9.103 and < 4.10≥ 4.4.133 and < 4.5≥ 3.18.110 and < 3.19≥ 3.16.58 and < 3.17 and 12 more version 39169410574503c6e901de1aa6eac5108475e017version d827bea2d18c07ba514f7d48cde49f90da9a1384≥ a45b599ad808c3c982fdcdc12b0b8611c2f92824 and < 83f0241959831586d9b6d47f6bd5d3dec8f43bf0version 93314640426ddb6af618d0802e622f6fa771792cversion 58b7ce6f9ef2367f86384b20458642945993b816version 582802e7c617cfb07cc15f280c128e6decbc57b8≥ a45b599ad808c3c982fdcdc12b0b8611c2f92824 and < 41e99fe2005182139b1058db71f0d241f8f0078c≥ a45b599ad808c3c982fdcdc12b0b8611c2f92824 and < 5b815ddb3f5560fac35b16de3a2a22d5f81c5993≥ a45b599ad808c3c982fdcdc12b0b8611c2f92824 and < 0f18eac44c5668204bf6eebb01ddb369ac56932b≥ a45b599ad808c3c982fdcdc12b0b8611c2f92824 and < cb1401b5bcc2feb5b038fc4b512e5968b016e05e≥ a45b599ad808c3c982fdcdc12b0b8611c2f92824 and < 467fec3cefbeb9e3ea80f457da9a5666a71ca0d0≥ a45b599ad808c3c982fdcdc12b0b8611c2f92824 and < 4ba515dfff7eeca369ab85cdbb3f3b231c71720c	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.21%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 13, 2026
Affected products added · linux/linux
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Deferred
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
2025
CVE published
Dec 16, 2025 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

7 on the record

git.kernel.org/stable/c/467fec3cefbeb9e3ea80f457da9a5666a71ca0d0
NIST National Vulnerability Database
git.kernel.org/stable/c/4ba515dfff7eeca369ab85cdbb3f3b231c71720c
NIST National Vulnerability Database
git.kernel.org/stable/c/5b815ddb3f5560fac35b16de3a2a22d5f81c5993
NIST National Vulnerability Database
git.kernel.org/stable/c/0f18eac44c5668204bf6eebb01ddb369ac56932b
NIST National Vulnerability Database
git.kernel.org/stable/c/cb1401b5bcc2feb5b038fc4b512e5968b016e05e
NIST National Vulnerability Database
git.kernel.org/stable/c/41e99fe2005182139b1058db71f0d241f8f0078c
NIST National Vulnerability Database
git.kernel.org/stable/c/83f0241959831586d9b6d47f6bd5d3dec8f43bf0
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 8h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 8h
Unknown CVE-2026-98431 RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency 1d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-68288 is "usb: storage: Fix memory leak in USB bulk transport", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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