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CVE-2026-64465· NVD / CVE Program· CNA Linux

usb: xhci: Fix sleep in atomic context in xhci_free_streams()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 10666ac9c552990204e791af653abf8e9d9ff619, 1e45aa722c4ce5663e987102aac18c8ad6a83fdd, 42c37c4b75d38b51d84f31a8e29427f5e06a7c2a; azl3 kernel 6.6.144.1-1 on Azure Linux 3.0 6.6.145.2-1.

Low priority for now. Upgrade to Linux Linux 10666ac9c552990204e791af653abf8e9d9ff619, 1e45aa722c4ce5663e987102aac18c8ad6a83fdd, 42c37c4b75d38b51d84f31a8e29427f5e06a7c2a; azl3 kernel 6.6.144.1-1 on Azure Linux 3.0 6.6.145.2-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

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.

—No exploit Fix available
Published
Jul 25, 2026
Updated
Aug 17, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.35affected
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before e623e4a203f56d5c57519a9a3cb29600551534adaffected · git
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before d107eb316144c5fb958486e7fe604cd7f1b35cdaaffected · git
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before 1e45aa722c4ce5663e987102aac18c8ad6a83fddaffected · git
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before 10666ac9c552990204e791af653abf8e9d9ff619affected · git
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before f7b022ae07685e7526fc39f387ce65b5d309dd3baffected · git
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before f90586129cf9e1fbdb718ef602eea3f15dc1c31caffected · git
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before 93cd037da94fcb93183bfb2457e3a56d3eb4c8f4affected · git
    • 8df75f42f8e67e2851cdcf6da91640fb881defd1 and later · before 42c37c4b75d38b51d84f31a8e29427f5e06a7c2aaffected · git
    • before 2.6.35not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:12linux-6.12before 6.12.100-1~deb12u16.12.100-1~deb12u1
Debian:13linuxbefore 6.12.96-16.12.96-1
Debian:14linuxbefore 7.1.4-17.1.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
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    40Plan
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux10666ac9c552990204e791af653abf8e9d9ff619Vendor (CNA)
Linux Linux1e45aa722c4ce5663e987102aac18c8ad6a83fddVendor (CNA)
Linux Linux42c37c4b75d38b51d84f31a8e29427f5e06a7c2aVendor (CNA)
Linux Linux93cd037da94fcb93183bfb2457e3a56d3eb4c8f4Vendor (CNA)
Linux Linuxd107eb316144c5fb958486e7fe604cd7f1b35cdaVendor (CNA)
Linux Linuxe623e4a203f56d5c57519a9a3cb29600551534adVendor (CNA)
Linux Linuxf7b022ae07685e7526fc39f387ce65b5d309dd3bVendor (CNA)
Linux Linuxf90586129cf9e1fbdb718ef602eea3f15dc1c31cVendor (CNA)
azl3 kernel 6.6.144.1-1 on Azure Linux 3.06.6.145.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.100-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records