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Fencer Vulns
medium 4.0

CVE-2026-47104 json

libusb < 1.0.30 Out-of-Bounds Read in parse_iad_array()

published 2026-05-27 5 mo ago modified 2026-11-08 24 h ago also EUVD-2026-32500 , GHSA-fh6g-r8pf-wqgw , JLSEC-2026-666 , PYSEC-2026-3979

cvss
4.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

libusb before version 1.0.30 contains a one-byte out-of-bounds read vulnerability in parse_iad_array() in descriptor.c that allows attackers to trigger a denial of service by supplying a malformed USB descriptor whose bLength equals size minus one, causing the bounds check to use the original buffer size instead of the remaining size. Attackers in virtualized environments with USB passthrough can supply crafted descriptors through libusb_get_active_interface_association_descriptors or libusb_get_interface_association_descriptors to read one byte past the end of the malloc allocation, resulting in a denial of service.

Patch / fix

  • julia libusb_jll 1.0.30+0
  • pypi libusb 1.0.30
  • libusb libusb 1.0.30
  • libusb-1.0 Debian 14 2:1.0.30-1

debian advisories DEBIAN-CVE-2026-47104

  • libusb1 hummingbird 1 1.0.30-1.hum1
  • mingw32-libusb1 hummingbird 1 1.0.30-1.hum1
  • mingw64-libusb1 hummingbird 1 1.0.30-1.hum1
  • libusb1-tests-examples hummingbird 1 1.0.30-1.hum1

red hat advisories RHSA-2026:20075

  • libusb-1_0 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.0.28-160000.3.1
  • libusb-1_0 Linux Micro 6.1 1.0.27-slfo.1.1_2.1
  • libusb-1_0 Linux Micro 6.0 1.0.27-2.1

suse advisories SUSE-SU-2026:23501-1SUSE-SU-2026:23644-1SUSE-SU-2026:23660-1SUSE-SU-2026:23519-1SUSE-SU-2026:23450-1

  • libusb-1_0 openSUSE Leap 16.0 1.0.28-160000.3.1

opensuse advisories openSUSE-SU-2026:21783-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47104 updated cvss 5.5

libusb: libusb: Denial of Service via malformed USB descriptor

  • Red Hat Enterprise Linux 6 libusb, libusb1
    affected: workaround, no fix available, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 libusb
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 libusb Red Hat Enterprise Linux 9 libusb Red Hat Enterprise Linux 10 libusb1
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images libusb1 1.0.30-1.hum1, mingw32-libusb1 1.0.30-1.hum1, mingw64-libusb1 1.0.30-1.hum1, libusb1-tests-examples 1.0.30-1.hum1
    fixed: vendor fix RHSA-2026:20075

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.1 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 3.1 4.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 4.0 5.1 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia libusb_jll
<1.0.30+0
1.0.30+0
pypi libusb
<1.0.30
1.0.30

Affected products

  • libusb libusb

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.