Description

In the Linux kernel, the following vulnerability has been resolved: Input: pegasus-notetaker - fix potential out-of-bounds access In the pegasus_notetaker driver, the pegasus_probe() function allocates the URB transfer buffer using the wMaxPacketSize value from the endpoint descriptor. An attacker can use a malicious USB descriptor to force the allocation of a very small buffer. Subsequently, if the device sends an interrupt packet with a specific pattern (e.g., where the first byte is 0x80 or 0x42), the pegasus_parse_packet() function parses the packet without checking the allocated buffer size. This leads to an out-of-bounds memory access.

References 8

• git.kernel.org https://git.kernel.org/stable/c/015b719962696b793997e8deefac019f816aca77
• git.kernel.org https://git.kernel.org/stable/c/084264e10e2ae8938a54355123ad977eb9df56d6
• git.kernel.org https://git.kernel.org/stable/c/36bc92b838ff72f62f2c17751a9013b29ead2513
• git.kernel.org https://git.kernel.org/stable/c/69aeb507312306f73495598a055293fa749d454e
• git.kernel.org https://git.kernel.org/stable/c/763c3f4d2394a697d14af1335d3bb42f05c9409f
• git.kernel.org https://git.kernel.org/stable/c/9ab67eff6d654e34ba6da07c64761aa87c2a3c26
• git.kernel.org https://git.kernel.org/stable/c/c4e746651bd74c38f581e1cf31651119a94de8cd
• git.kernel.org https://git.kernel.org/stable/c/d344ea1baf1946c90f0cd6f9daeb5f3e0a0ca479

Remediation