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

Q: How do I fix CVE-2026-23679?

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

Q: Is CVE-2026-23679 being exploited?

CVE-2026-23679 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-2026-23679 affect?

CVE-2026-23679 affects libusb. Severity is medium (CVSS 6.2). libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but i

Q: How urgent is CVE-2026-23679?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 6.2UPGRADE

CVE-2026-23679 is a medium-severity flaw (CVSS 6.2) 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 NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw throug

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 92%)
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 14:16 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-2026-23679?

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

Is CVE-2026-23679 being exploited?

CVE-2026-23679 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-2026-23679 affect?

CVE-2026-23679 affects libusb. Severity is medium (CVSS 6.2). libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but i

How urgent is CVE-2026-23679?

Priority 24/100. No elevated risk signals yet.

Related CVEs

CVE-2026-47104 MEDIUM 4.0 UPGRADE libusb before version 1.0.30 contains a one-byte out-of-bounds read vulnerability in parse_iad_array() in desc

References

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