CVE-2026-47104: libusb before version 1.0.30 contains a one-byte out-of-bounds read vulnerability in parse_iad_array() in desc

Q: How do I fix CVE-2026-47104?

libusb: upgrade to 1.0.30. Exact commands for each OS are on this page.

Q: Is CVE-2026-47104 being exploited?

CVE-2026-47104 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-47104 affect?

CVE-2026-47104 affects libusb. Severity is medium (CVSS 4.0). 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 mi

Q: How urgent is CVE-2026-47104?

Priority 15/100. No elevated risk signals yet.

Routine

MEDIUM 4.0UPGRADE

CVE-2026-47104 is a medium-severity flaw (CVSS 4.0) affecting libusb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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_acti

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.0 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-05-27
Last modified	2026-10-14

Publisher (CNA): VulnCheck · Vendor: libusb

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-27 14:17 UTCPublished CVE record published
2026-10-14 20:10 UTCUpdated Record last modified

libusb libusb UPGRADE

Affected: < 1.0.30

Fixed in: 1.0.30

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libusb || rpm -q libusb || libusb --version

2. UPGRADE to 1.0.30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libusb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libusb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-47104?

libusb: upgrade to 1.0.30. Exact commands for each OS are on this page.

Is CVE-2026-47104 being exploited?

CVE-2026-47104 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-47104 affect?

CVE-2026-47104 affects libusb. Severity is medium (CVSS 4.0). 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 mi

How urgent is CVE-2026-47104?

Priority 15/100. No elevated risk signals yet.

Related CVEs

CVE-2026-23679 MEDIUM 6.2 UPGRADE libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash

References

← Back to latest CVEs