Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: HID: mcp2221: validate report size in mcp2221_raw_event() mcp2221_raw_event() never validates the size of incoming HID reports. In the MCP2221_I2C_GET_DATA path it trusts the device-supplied data[3] as the copy length without checking that 4 + data[3] bytes actually exist in the received report. A malicious or misbehaving USB device can send a short report with a large data[3], causing the memcpy to read past the valid report data in the HID transfer buffer and leak uninitialized kernel memory back to userspace through the I2C/SMBus read path. Add a minimum size check at entry and validate that the source range fits within the received report before the copy.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 67a95c21463d066060b0f66d65a75d45bb386ffb before cb38b1f149b7143355b37e86c841acf0076e5c2a; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before fffcfa367072628c3144cca17d2a3c3c9e50c057; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before c1c508e8923911cb458234997e55b7a4b9aa066f; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 127de5919820f88a9d55e8371ad4ac49f625f4c5; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 7c18fb36708a97ff6772825cc087b6d537bbf0d5; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 2c9a6998c19503626c57a2267bf279e204113079 |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/cb38b1f149b7143355b37e86c841acf0076e5c2a
- https://git.kernel.org/stable/c/b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d
- https://git.kernel.org/stable/c/fffcfa367072628c3144cca17d2a3c3c9e50c057
- https://git.kernel.org/stable/c/c1c508e8923911cb458234997e55b7a4b9aa066f
- https://git.kernel.org/stable/c/bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149
- https://git.kernel.org/stable/c/127de5919820f88a9d55e8371ad4ac49f625f4c5
- https://git.kernel.org/stable/c/7c18fb36708a97ff6772825cc087b6d537bbf0d5
- https://git.kernel.org/stable/c/2c9a6998c19503626c57a2267bf279e204113079