Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix dma_buffer leak on bus acquire failure wilc_wlan_firmware_download() allocates dma_buffer with kmalloc() at the top of the function and uses a 'fail:' label to free it via kfree(dma_buffer) on error. All later error paths correctly use 'goto fail' to route through this cleanup. However, the early failure path after the first acquire_bus() call uses a bare 'return ret;', which leaks dma_buffer whenever the bus acquire fails. Replace the early return with goto fail so the existing cleanup path runs. Found via a custom Coccinelle semantic patch hunting for kmalloc'd locals leaked on early-return error paths in driver firmware-download code.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1241c5650ff7a0236cebb89acca8aade48839fd6 before 95c82d498d74c4e587db30021ca1aec90e29b5a5; affected 1241c5650ff7a0236cebb89acca8aade48839fd6 before 32d7584441b9ecb279a03653b432612546e5efbe; affected 1241c5650ff7a0236cebb89acca8aade48839fd6 before dd7b6a8671939708cc4b7a46786d8c11297e8f69 |
| Linux / Linux | affected 6.13; unaffected 0 before 6.13; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.