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Available supporting content describes a vulnerability in FreeBSD's RPC/NFS handling path, specifically in the kernel function svc_rpc_gss_validate. The flaw is characterized as a stack-based buffer overflow caused by copying attacker-controlled RPCSEC_GSS credential data into a fixed 128-byte stack buffer (rpchdr) without validating that oa_length fits in the remaining buffer space after fixed RPC header fields are written. According to the provided analysis, oa_length is derived from untrusted network input and oa_base is copied with memcpy using that unchecked length, allowing a crafted RPC or NFS request to overwrite adjacent stack memory. The content notes that pointer advancement using RNDUP(oa_length) may also move parsing state beyond the end of the local buffer. The mapping to CVE-2022-23083 is presented in the content as likely rather than definitive.
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Cross-references every affected SKU, including bundled OEM variants.
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