hathach TinyUSB up to 0.21.0 MTP Device Class Helper src/class/mtp/mtp.h mtp_container_get_string out-of-bounds write

Summaryinfo

A vulnerability was found in hathach TinyUSB up to 0.21.0. It has been declared as problematic. Affected by this issue is the function mtp_container_get_string of the file src/class/mtp/mtp.h of the component MTP Device Class Helper. Executing a manipulation can lead to out-of-bounds write. This vulnerability appears as CVE-2026-61495. The attack requires local access. There is no available exploit. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability has been found in hathach TinyUSB up to 0.21.0 and classified as problematic. This vulnerability affects the function mtp_container_get_string of the file src/class/mtp/mtp.h of the component MTP Device Class Helper. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

TinyUSB through 0.21.0, fixed in commit e85c2b8, contains an out-of-bounds write vulnerability in the MTP device class helper mtp_container_get_string() in src/class/mtp/mtp.h that allows a malicious USB host to corrupt adjacent memory by supplying a crafted MTP string with an unbounded character count. Attackers can exploit the unchecked memcpy operation copying up to 510 bytes into a fixed-size destination buffer to achieve code execution or cause a denial of service on the TinyUSB MTP device.

The advisory is available at github.com. This vulnerability was named CVE-2026-61495 since 07/10/2026. The exploitation appears to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

Applying the patch e85c2b8 is able to eliminate this problem.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• hathach

Name

• TinyUSB

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21.0

Website

• Product: https://github.com/hathach/tinyusb/

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