Unknown

CVE-2026-64465 — usb: xhci: Fix sleep in atomic context in xhci_free_streams()

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix sleep in atomic context in xhci_free_streams() When a USB device with active stream endpoints is disconnected, xhci_free_streams() is called from the hub_event workqueue to free the stream resources. It calls xhci_free_stream_info() while holding xhci->lock with irqs disabled. xhci_free_stream_info() invokes xhci_free_stream_ctx(), which calls dma_free_coherent() for large stream context arrays. dma_free_coherent() can sleep (e.g. via vunmap), triggering a BUG when called from atomic context. Call trace: dma_free_attrs+0x174/0x220 xhci_free_stream_info+0xd0/0x11c xhci_free_streams+0x278/0x37c usb_free_streams+0x98/0xc0 usb_unbind_interface+0x1b8/0x2f8 device_release_driver_internal+0x1d4/0x2cc device_release_driver+0x18/0x28 bus_remove_device+0x160/0x1a4 device_del+0x1ec/0x350 usb_disable_device+0x98/0x214 usb_disconnect+0xf0/0x35c hub_event+0xab4/0x19ec process_one_work+0x278/0x63c Fix this by saving the stream_info pointers and clearing the ep references under the lock, then calling xhci_free_stream_info() outside the lock where sleeping is allowed.

Published Jul 25, 2026 · Updated Oct 15, 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

No scoring signals.

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

—

No EPSS score.

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	≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < e623e4a203f56d5c57519a9a3cb29600551534ad≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < d107eb316144c5fb958486e7fe604cd7f1b35cda≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < 1e45aa722c4ce5663e987102aac18c8ad6a83fdd≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < 10666ac9c552990204e791af653abf8e9d9ff619≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < f7b022ae07685e7526fc39f387ce65b5d309dd3b≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < f90586129cf9e1fbdb718ef602eea3f15dc1c31c≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < 93cd037da94fcb93183bfb2457e3a56d3eb4c8f4≥ 8df75f42f8e67e2851cdcf6da91640fb881defd1 and < 42c37c4b75d38b51d84f31a8e29427f5e06a7c2a and 1 more version 2.6.35	Vulnerable	CVE Program (cve.org) e CISA ADP

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 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Jul 25, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619
NIST National Vulnerability Database
git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad
NIST National Vulnerability Database
git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd
NIST National Vulnerability Database
git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a
NIST National Vulnerability Database
git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda
NIST National Vulnerability Database
git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b
NIST National Vulnerability Database
git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c
NIST National Vulnerability Database
git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4
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 12h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 12h
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
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 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 FIRST EPSS score.
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-2026-64465 is "usb: xhci: Fix sleep in atomic context in xhci_free_streams()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. 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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