CVE-2026-53398
Description
In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix SECINFO_NO_NAME decode error cleanup nfsd4_decode_secinfo_no_name() currently initializes sin_exp after decoding sin_style. If the XDR stream is truncated, the decoder returns nfserr_bad_xdr before sin_exp is initialized. Since commit 3fdc54646234 ("NFSD: Reduce amount of struct nfsd4_compoundargs that needs clearing"), the inline iops array is not cleared between RPC calls. A failed SECINFO_NO_NAME decode can therefore leave sin_exp holding stale union contents from a previous operation. The error response path still invokes nfsd4_secinfo_no_name_release(), which calls exp_put() on a non-NULL sin_exp. Initialize sin_exp before the first failable decode step, matching nfsd4_decode_secinfo().
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
Affected
| Vendor | Product | Version |
|---|---|---|
| microsoft | Microsoft Exchange Online | |
| microsoft | Windows Server 2012 | |
| microsoft | Windows Server 2012 (Server Core installation) | |
| microsoft | Windows Server 2012 R2 | |
| microsoft | Windows Server 2012 R2 (Server Core installation) | |
| microsoft | Microsoft Excel 2016 (32-bit edition) | |
| microsoft | Microsoft Excel 2016 (64-bit edition) | |
| microsoft | Microsoft PowerPoint 2016 (32-bit edition) | |
| microsoft | Microsoft PowerPoint 2016 (64-bit edition) | |
| microsoft | Microsoft Word 2016 (32-bit edition) | |
| microsoft | Microsoft Word 2016 (64-bit edition) | |
| microsoft | Microsoft Office 2016 (32-bit edition) | |
| microsoft | Microsoft Office 2016 (64-bit edition) | |
| microsoft | Windows Server 2016 | |
| microsoft | Office Online Server | |
| microsoft | Windows 10 Version 1607 for 32-bit Systems | |
| microsoft | Windows 10 Version 1607 for x64-based Systems | |
| microsoft | Windows Server 2016 (Server Core installation) | |
| microsoft | Microsoft SharePoint Enterprise Server 2016 | |
| microsoft | Microsoft SQL Server 2017 for x64-based Systems (GDR) | |
| microsoft | Windows 10 Version 1809 for 32-bit Systems | |
| microsoft | Windows 10 Version 1809 for x64-based Systems | |
| microsoft | Windows Server 2019 | |
| microsoft | Windows Server 2019 (Server Core installation) | |
| microsoft | Microsoft Office 2019 for 32-bit editions | |
| microsoft | Microsoft Office 2019 for 64-bit editions | |
| microsoft | Microsoft SharePoint Server 2019 | |
| microsoft | Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) | |
| microsoft | Visual Studio Code | |
| microsoft | Windows Admin Center | |
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Windows Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53398
- https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10
- https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647
- https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232
- https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439
- https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585
- https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011
- https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6
- https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5
- https://www.suse.com/security/cve/CVE-2026-53398.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.