CVE-2026-98951
Last modified
CVE-2026-98951 is a vulnerability of currently unknown severity. 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.
Description
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 Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 9300f00439743c4a34d735e1a27118eb68a1504e, < 89fc70d73f4ac8781f9e15edd1dbc6b6088453b3; >= 9300f00439743c4a34d735e1a27118eb68a1504e, < 59052a88ba5fe4a7bb34b3a0a42aa5d453d3bb97; f2a9cd050901c4734bc175294c3bd6a40a1a9e99; >= 6.5.3, < 6.6 |
| Linux | Linux | 6.6 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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