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().
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 5e76b25d7cc82c148d391c0c43b884e6427cb302, < 8836405abdc53ca3dd5fc68b2cf6f8f012fad011; >= 07b68ff5c71cf4ed5443016d8eb116863c0a4d88, < 49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439; >= 3fdc546462348b8a497c72bc894e0cde9f10fc40, < 5ec37edcb534f3fc92304be236d37f08e6545585; >= 3fdc546462348b8a497c72bc894e0cde9f10fc40, < 1e04be34cafae119e82bcaccd6d28a20f72a3647; >= 3fdc546462348b8a497c72bc894e0cde9f10fc40, < 161d1aaeb04d620d3692639700512bb5038c1e10; >= 3fdc546462348b8a497c72bc894e0cde9f10fc40, < c8a24effd96d4779e2ad779654682304491c55a5; >= 3fdc546462348b8a497c72bc894e0cde9f10fc40, < 46eb17d45be69d28c7a23ea03283b207426a8232; >= 3fdc546462348b8a497c72bc894e0cde9f10fc40, < 9e18e83b8846a5c3fe13fc8a464b4865d33996c6; >= 5.10.220, < 5.10.260; >= 5.15.154, < 5.15.211 |
| Linux | Linux | 6.1 |
References
- https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10Patch
- https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647Patch
- https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232Patch
- https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439Patch
- https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585Patch
- https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011Patch
- https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6Patch
- https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5Patch
Timeline
- Published
- Jul 19, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified