Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: accel/ivpu: Validate firmware log buffer metadata The tracing log headers parsed by fw_log_print_buffer() reside in DMA-shared BOs that the NPU firmware can write to. fw_log_from_bo() validated log->header_size and log->size, but fw_log_print_buffer() re-read those same fields from shared memory afterwards, allowing a TOCTOU where firmware changes them between the check and the use, and making the host dereference out-of-bounds addresses while printing logs. Snapshot the validated values once with READ_ONCE() and pass them down explicitly in a new struct ivpu_fw_log_desc instead of re-reading them from the shared struct.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d4e4257afa6ed5205eda993180401fc2c20e4b60 before 07d4190d75021c38b7994045179aa29131634d4f; affected d4e4257afa6ed5205eda993180401fc2c20e4b60 before 8ec3d6972f1440fae6c8dadd1859892775208759; affected d4e4257afa6ed5205eda993180401fc2c20e4b60 before 40868f80a89199630b03d4457876f9a1feba0660; affected d4e4257afa6ed5205eda993180401fc2c20e4b60 before b1555f63ee1a680f280bc18e8dac416f250e2ec3; affected d4e4257afa6ed5205eda993180401fc2c20e4b60 before 0724afc55c77c36c7feb9a7264b02aa7593c5c2d |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/07d4190d75021c38b7994045179aa29131634d4f
- https://git.kernel.org/stable/c/8ec3d6972f1440fae6c8dadd1859892775208759
- https://git.kernel.org/stable/c/40868f80a89199630b03d4457876f9a1feba0660
- https://git.kernel.org/stable/c/b1555f63ee1a680f280bc18e8dac416f250e2ec3
- https://git.kernel.org/stable/c/0724afc55c77c36c7feb9a7264b02aa7593c5c2d