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NVD / CVE Program· CNA Linux

CVE-2026-64335: USB: serial: digi_acceleport: fix broken rx after throttle

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 4f3f6f44db71e469933a7c36c5d57d937ba0a21b, 61954033326fc7e637ed2aeeb4b52021e0ee4657, 83a3dfc018943b05b6daf3a6f891833e1aabfa1f.

Low priority for now. Upgrade to Linux Linux 4f3f6f44db71e469933a7c36c5d57d937ba0a21b, 61954033326fc7e637ed2aeeb4b52021e0ee4657, 83a3dfc018943b05b6daf3a6f891833e1aabfa1f 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

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: USB: serial: digi_acceleport: fix broken rx after throttle If the port is closed while throttled, the read urb is never resubmitted and the port will not receive any further data until the device is reconnected (or the driver is rebound). Clear the throttle flags and submit the urb if needed when opening the port.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 25, 2026
Updated
Sep 3, 2026
EPSS
0.1% · 1th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel2.6.12.1 and later · before 5.10.261
  • linux linux kernel5.11 and later · before 5.15.212
  • linux linux kernel5.16 and later · before 6.1.178
  • linux linux kernel6.2 and later · before 6.6.145
  • linux linux kernel6.7 and later · before 6.12.96
  • linux linux kernel6.13 and later · before 6.18.39
  • linux linux kernel6.19 and later · before 7.1.4
  • linux linux kernel2.6.12
  • linux linux kernel7.2

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 4f3f6f44db71e469933a7c36c5d57d937ba0a21baffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d5d2660caef78d4c996d34d123574c8e86f5b5acaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 61954033326fc7e637ed2aeeb4b52021e0ee4657affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 8d50a910194f66566a5eb252b33283855c8d5203affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before abacd67e6f689c62d8a13e3da25f4272bc9ad4afaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before eab394781e9321c0c7e97a24fd092387cb262f40affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 92fa3e1a49848509ea3f7995751963fc65095998affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 83a3dfc018943b05b6daf3a6f891833e1aabfa1faffected · git
    • before 2.6.12not 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-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-64332Jul 25, 2026 · USB: ulpi: fix memory leak on registration failure
    22Monitor
  • ← EarlierCVE-2026-64334Jul 25, 2026 · USB: serial: digi_acceleport: fix hard lockup on disconnect
    22Monitor
  • Later →CVE-2026-64336Jul 25, 2026 · USB: serial: keyspan_pda: fix information leak
    22Monitor

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 Linux4f3f6f44db71e469933a7c36c5d57d937ba0a21bVendor (CNA)
Linux Linux61954033326fc7e637ed2aeeb4b52021e0ee4657Vendor (CNA)
Linux Linux83a3dfc018943b05b6daf3a6f891833e1aabfa1fVendor (CNA)
Linux Linux8d50a910194f66566a5eb252b33283855c8d5203Vendor (CNA)
Linux Linux92fa3e1a49848509ea3f7995751963fc65095998Vendor (CNA)
Linux Linuxabacd67e6f689c62d8a13e3da25f4272bc9ad4afVendor (CNA)
Linux Linuxd5d2660caef78d4c996d34d123574c8e86f5b5acVendor (CNA)
Linux Linuxeab394781e9321c0c7e97a24fd092387cb262f40Vendor (CNA)
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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records