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        "cveId": "CVE-2026-31633",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.125Z",
        "datePublished": "2026-04-24T14:44:48.621Z",
        "dateUpdated": "2026-10-16T15:20:17.544Z"
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                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix integer overflow in rxgk_verify_response()\n\nIn rxgk_verify_response(), there's a potential integer overflow due to\nrounding up token_len before checking it, thereby allowing the length check to\nbe bypassed.\n\nFix this by checking the unrounded value against len too (len is limited as\nthe response must fit in a single UDP packet)."
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                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
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                        {
                            "lang": "en",
                            "value": "AV:N - rxgk_verify_response() is reached by a remote RxRPC RESPONSE packet over UDP on a listening RxRPC service using YFS-RxGK security.\nAC:L - The attacker controls the RESPONSE packet fields needed to trigger the integer overflow; no race or condition outside attacker control is required.\nPR:N - The vulnerable parsing occurs during the service-side challenge/response handshake before the RESPONSE authenticator is verified, so no authenticated credentials are required.\nUI:N - No victim user action is required once an affected RxRPC service is listening and reachable.\nS:U - The impact is within the kernel/RxRPC service security authority and does not cross a separate sandbox, VM, or hardware boundary.\nC:H - The overflow can cause subsequent token/authenticator parsing and crypto scatterlist construction to operate on attacker-controlled impossible lengths, creating out-of-bounds memory access potential.\nI:H - The affected decryption path operates in place over scatterlists derived from corrupted lengths, making kernel memory corruption and control-flow-relevant modification defensible.\nA:H - Related oversized RxGK RESPONSE length paths reach skb_to_sgvec() BUG_ON(len), and this overflow can similarly drive impossible lengths, causing a remote kernel crash."
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                    "programFiles": [
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                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
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                }
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1f864d9daaf622aeaa774404fd51e7d6a435b046"
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                {
                    "url": "https://git.kernel.org/stable/c/c1e242beb6b1efc3c286f617e8d940c8fbf2ed41"
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                {
                    "url": "https://git.kernel.org/stable/c/699e52180f4231c257821c037ed5c99d5eb0edb8"
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            "title": "rxrpc: Fix integer overflow in rxgk_verify_response()",
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