CVE-2022-50861
Information Leak in Linux Kernel NFSD Due to XDR Encoder Bug
Publication date: 2025-12-30
Last updated on: 2025-12-30
Assigner: kernel.org
Description
Description
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is in the Linux kernel's NFSD component related to NFSv2 GETACL result encoding. The issue was that the xdr_stream conversion code incorrectly set the page_len of the send buffer, causing extra garbage data past the end of the Reply message. This garbage data leaks stale memory contents onto the network wire, although clients typically ignore it. The fix involved ensuring the XDR stream encoders handle the page_len automatically, preventing this memory leakage.
How can this vulnerability impact me? :
The vulnerability can lead to leakage of stale memory contents over the network when using the NFSD NFSv2 GETACL functionality. This could potentially expose sensitive or unintended data to clients, although clients typically ignore the extra garbage data. Nonetheless, it represents an information disclosure risk.