Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
sunrpc: fix uninitialized xprt_create_args structure
The xprt_create_args structure is allocated on the stack without initialization in rpc_sysfs_xprt_switch_add_xprt_store(). While some fields are manually populated, critical fields like srcaddr, bc_xps, and flags contain uninitialized stack garbage.
This can lead to:
- Kernel panic when xs_setup_xprt() dereferences garbage srcaddr
- Information leak if srcaddr points to sensitive stack data
- Unpredictable behavior if flags has random bits set
The fix is to zero-initialize the structure to ensure all unused fields are NULL/0, preventing the transport setup code from acting on garbage data.
Details
- Affected product:
- Debian 10 ELS
- Affected packages:
- linux @ 4.19.0