Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: riscv: ptrace: Zero-initialize regset buffers before copyin user_regset_copyin() only copies `count` bytes, so a PTRACE_SETREGSET request with a short iov_len leaves the rest of the stack buffer uninitialized. In riscv_vr_set() that garbage is validated and copied into the target's vstate, and in riscv_cfi_set() it can be stored as the target's shadow stack pointer. Zero both buffers, as the get path already does.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9300f00439743c4a34d735e1a27118eb68a1504e before 89fc70d73f4ac8781f9e15edd1dbc6b6088453b3; affected 9300f00439743c4a34d735e1a27118eb68a1504e before 59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97; affected f2a9cd050901c4734bc175294c3bd6a40a1a9e99; affected 6.5.3 before 6.6 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 7.2.11 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.