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().
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.10.220 | 5.10.260 |
| linux / linux_kernel | 5.15.154 | 5.15.211 |
| linux / linux_kernel | 6.1 | 6.1.177 |
| linux / linux_kernel | 6.2 | 6.6.144 |
| linux / linux_kernel | 6.7 | 6.12.95 |
| linux / linux_kernel | 6.13 | 6.18.38 |
| linux / linux_kernel | 6.19 | 7.1.3 |
A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
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