Critical severity9.8NVD Advisory· Published Jul 19, 2026· Updated Oct 16, 2026
CVE-2026-53398
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().
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
92- osv-coords90 versionspkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-modulespkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-debug-modules-corepkg:linux/kernelpkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/rtlapkg:rpm/almalinux/rvpkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/libperfpkg:rpm/almalinux/perfpkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/python3-perfpkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-tools
< 6.12.0-160000.37.1+ 89 more
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Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10nvdPatch
- git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647nvdPatch
- git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232nvdPatch
- git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439nvdPatch
- git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585nvdPatch
- git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011nvdPatch
- git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6nvdPatch
- git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5nvdPatch
News mentions
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