PYSEC-2026-3979
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/libusb/PYSEC-2026-3979.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-3979
- Aliases
- Published
- 2026-05-27T14:17:32Z
- Modified
- 2026-09-11T12:00:03Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://github.com/libusb/libusb/releases/tag/v1.0.30
- https://github.com/libusb/libusb/issues/1813
- https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704
- https://github.com/libusb/libusb/pull/1814
- https://www.vulncheck.com/advisories/libusb-out-of-bounds-read-in-parse-iad-array
Affected packages
PyPI / libusb
Package
- Name
- libusb
- View open source insights on deps.dev
- Purl
- pkg:pypi/libusb
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed1.0.30
Affected versions
1.*
1.0.22b2
1.0.22b4
1.0.22b8
1.0.22b9
1.0.23b1
1.0.23b7
1.0.24b1
1.0.24b3
1.0.26b2
1.0.26b3
1.0.26b4
1.0.26b5
1.0.26rc2
1.0.26rc4
1.0.26
1.0.27
1.0.27.post1
1.0.27.post2
1.0.27.post3
1.0.27.post4
1.0.28
1.0.28.post1
1.0.28.post2
1.0.29
1.0.29.post1
1.0.29.post3
1.0.29.post4
1.0.29.post6
1.0.29.post7
1.0.30rc1
1.0.30rc2