Description · from the CVE record
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().
Affected
ProductAffectedFixed inSource
Linux5e76b25d7cc82c148d391c0c43b884e6427cb302 – < 8836405abdc53ca3dd5fc68b2cf6f8f012fad0118836405abdc53ca3dd5fc68b2cf6f8f012fad011CNA
Linux07b68ff5c71cf4ed5443016d8eb116863c0a4d88 – < 49de5d31dd8fdebf78bdeaf196b0ca5cd5c7543949de5d31dd8fdebf78bdeaf196b0ca5cd5c75439CNA
Linux3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 5ec37edcb534f3fc92304be236d37f08e65455855ec37edcb534f3fc92304be236d37f08e6545585CNA
Linux3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 1e04be34cafae119e82bcaccd6d28a20f72a36471e04be34cafae119e82bcaccd6d28a20f72a3647CNA
Linux3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 161d1aaeb04d620d3692639700512bb5038c1e10161d1aaeb04d620d3692639700512bb5038c1e10CNA
Linux3fdc546462348b8a497c72bc894e0cde9f10fc40 – < c8a24effd96d4779e2ad779654682304491c55a5c8a24effd96d4779e2ad779654682304491c55a5CNA
Linux3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 46eb17d45be69d28c7a23ea03283b207426a823246eb17d45be69d28c7a23ea03283b207426a8232CNA
Linux3fdc546462348b8a497c72bc894e0cde9f10fc40 – < 9e18e83b8846a5c3fe13fc8a464b4865d33996c69e18e83b8846a5c3fe13fc8a464b4865d33996c6CNA
Linux5.10.220 – < 5.10.2605.10.260CNA
Linux5.15.154 – < 5.15.2115.15.211CNA
Linux6.16.1.177CNA
by Kastro