Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-23679: 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 through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | libusbx | 0:1.0.21-1.amzn2.0.1 |
| Amazon Linux · 2 | libusbx-debuginfo | 0:1.0.21-1.amzn2.0.1 |
| Amazon Linux · 2 | libusbx-devel | 0:1.0.21-1.amzn2.0.1 |
| Amazon Linux · 2 | libusbx-devel-doc | 0:1.0.21-1.amzn2.0.1 |
Vulnerabilities 1
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Medium 6.2
libusb < 1.0.30 NULL Pointer Dereference in parse_interface()
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 cla…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-23679.html