Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvdimm/bus: Fix potential use after free in asynchronous initialization Dingisoul with KASAN reports a use after free if device_add() fails in nd_async_device_register(). Commit b6eae0f61db2 ("libnvdimm: Hold reference on parent while scheduling async init") correctly added a reference on the parent device to be held until asynchronous initialization was complete. However, if device_add() results in an allocation failure the ref count of the device drops to 0 prior to the parent pointer being accessed. Thus resulting in use after free. The bug bot AI correctly identified the fix. Save a reference to the parent pointer to be used to drop the parent reference regardless of the outcome of device_add().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before 6fc36c2a925ceaba203eb13d75a8f0879a2c121b; affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before a36cf138500e56f50db9f9a33222df6969b38326; affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before 9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d; affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e; affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before 2c638259ad750833fd46a0cf57672a618542d84c; affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before a226e5b49e5fe8c98b14f8507de670189d191348; affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before 84af19855d1abdee3c9d57c0684e2868e391793c; affected b6eae0f61db27748606cc00dafcfd1e2c032f0a5 before a8aec14230322ed8f1e8042b6d656c1631d41163; affected 8954771abdea5c34280870e35592c7226a816d95; affected 3e63a7f25cc85d3d3e174b9b0e3489ebb7eaf4ab; affected 1490de2bb0836fc0631c04d0559fdf81545b672f; affected e31a8418c8df7e6771414f99ed3d95ba8aca4e05; affected 4f1a55a4f990016406147cf3e0c9487bf83e50f0; affected 4.4.164 before 4.5; affected 4.9.137 before 4.10; affected 4.14.81 before 4.15; affected 4.18.19 before 4.19; affected 4.19.2 before 4.20 |
| Linux / Linux | affected 4.20; unaffected 0 before 4.20; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.167 through 6.1.*; unaffected 6.6.130 through 6.6.*; unaffected 6.12.78 through 6.12.*; unaffected 6.18.20 through 6.18.*; unaffected 6.19.10 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6fc36c2a925ceaba203eb13d75a8f0879a2c121b
- https://git.kernel.org/stable/c/a36cf138500e56f50db9f9a33222df6969b38326
- https://git.kernel.org/stable/c/9a0fb16ba5b372465a3a1ecd761c6fa911a4ab4d
- https://git.kernel.org/stable/c/e48bf8f1d2b12c1c5ba1f609edbd4cde5dadc20e
- https://git.kernel.org/stable/c/2c638259ad750833fd46a0cf57672a618542d84c
- https://git.kernel.org/stable/c/a226e5b49e5fe8c98b14f8507de670189d191348
- https://git.kernel.org/stable/c/84af19855d1abdee3c9d57c0684e2868e391793c
- https://git.kernel.org/stable/c/a8aec14230322ed8f1e8042b6d656c1631d41163