Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: can: kvaser_usb: leaf: Fix potential infinite loop in command parsers The `kvaser_usb_leaf_wait_cmd()` and `kvaser_usb_leaf_read_bulk_callback` functions contain logic to zero-length commands. These commands are used to align data to the USB endpoint's wMaxPacketSize boundary. The driver attempts to skip these placeholders by aligning the buffer position `pos` to the next packet boundary using `round_up()` function. However, if zero-length command is found exactly on a packet boundary (i.e., `pos` is a multiple of wMaxPacketSize, including 0), `round_up` function will return the unchanged value of `pos`. This prevents `pos` to be increased, causing an infinite loop in the parsing logic. This patch fixes this in the function by using `pos + 1` instead. This ensures that even if `pos` is on a boundary, the calculation is based on `pos + 1`, forcing `round_up()` to always return the next aligned boundary.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7259124eac7d1b76b41c7a9cb2511a30556deebe before 58343e0a4d43699f0e2f5b169384bbe4c0217add; affected 7259124eac7d1b76b41c7a9cb2511a30556deebe before 69c7825df64e24dc15d31631a1fc9145324b1345; affected 7259124eac7d1b76b41c7a9cb2511a30556deebe before 028e89c7e8b4346302e88df01cc50e0a1f05791a; affected 7259124eac7d1b76b41c7a9cb2511a30556deebe before e9dd83a75a7274edef21682c823bf0b66d7b6b7f; affected 7259124eac7d1b76b41c7a9cb2511a30556deebe before 0897cea266e39166a36111059ba147192b36592f; affected 7259124eac7d1b76b41c7a9cb2511a30556deebe before bd8135a560cf6e64f0b98ed4daadf126a38f7f48; affected 7259124eac7d1b76b41c7a9cb2511a30556deebe before 0c73772cd2b8cc108d5f5334de89ad648d89b9ec |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 5.10.247 through 5.10.*; unaffected 5.15.197 through 5.15.*; unaffected 6.1.159 through 6.1.*; unaffected 6.6.119 through 6.6.*; unaffected 6.12.61 through 6.12.*; unaffected 6.17.11 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/58343e0a4d43699f0e2f5b169384bbe4c0217add
- https://git.kernel.org/stable/c/69c7825df64e24dc15d31631a1fc9145324b1345
- https://git.kernel.org/stable/c/028e89c7e8b4346302e88df01cc50e0a1f05791a
- https://git.kernel.org/stable/c/e9dd83a75a7274edef21682c823bf0b66d7b6b7f
- https://git.kernel.org/stable/c/0897cea266e39166a36111059ba147192b36592f
- https://git.kernel.org/stable/c/bd8135a560cf6e64f0b98ed4daadf126a38f7f48
- https://git.kernel.org/stable/c/0c73772cd2b8cc108d5f5334de89ad648d89b9ec