{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-46039",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-13T15:03:33.093Z",
        "datePublished": "2026-05-27T12:56:51.317Z",
        "dateUpdated": "2026-08-05T12:29:17.995Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:29:17.995Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxgk: Fix potential integer overflow in length check\n\nFix potential integer overflow in rxgk_extract_token() when checking the\nlength of the ticket.  Rather than rounding up the value to be tested\n(which might overflow), round down the size of the available data."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - The bug is triggered by a crafted RxRPC RESPONSE packet received over UDP and parsed by the in-kernel rxgk server-side handshake (`rxgk_verify_response`); no local access is needed.\nAC:L - The integer overflow is deterministic for fixed `ticket_len` values (0xFFFFFFFD–0xFFFFFFFF), and all packet fields including the enumerable kvno/enctype used for the server-key lookup are attacker-controlled, so the attacker reliably triggers the OOB.\nPR:N - The RESPONSE packet is processed during the security handshake before the client is authenticated; the attacker needs no credentials, only a kvno/enctype matching a server key (a public, guessable identifier).\nUI:N - The rxrpc service processes incoming RESPONSE packets automatically with no victim interaction.\nS:U - The corruption is confined to the kernel's own memory within the same security authority; no VM/IOMMU boundary is crossed.\nC:H - The truncated negative length yields a ~4 GB scatterlist entry, causing an enormous out-of-bounds read of adjacent kernel memory during AEAD decryption, well beyond a few bounded bytes.\nI:H - The AEAD decrypt is in-place (src==dst scatterlist), so plaintext is written back across the oversized region, corrupting adjacent kernel heap memory (out-of-bounds write) before the fault.\nA:H - Reading/writing a ~4 GB region from a small skb buffer reliably hits unmapped memory, producing a kernel oops/panic (remote, unauthenticated DoS)."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/rxrpc/rxgk_app.c",
                        "net/rxrpc/rxgk_common.h"
                    ],
                    "versions": [
                        {
                            "version": "2429a197648178cd4dc930a9d87c13c547460564",
                            "lessThan": "43222ac484f93b3ec2d240a7575e1cedd31f5fa4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2429a197648178cd4dc930a9d87c13c547460564",
                            "lessThan": "183d37f12d1c8ed24a5bfc7addad05510da22a94",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2429a197648178cd4dc930a9d87c13c547460564",
                            "lessThan": "6929350080f4da292d111a3b33e53138fee51cec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "71571e187106631a8127f2dde780f35caa358d33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.16.9",
                            "lessThan": "6.17",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/rxrpc/rxgk_app.c",
                        "net/rxrpc/rxgk_common.h"
                    ],
                    "versions": [
                        {
                            "version": "6.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.27",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.4",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "6.18.27"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "7.0.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "7.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16.9"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/43222ac484f93b3ec2d240a7575e1cedd31f5fa4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/183d37f12d1c8ed24a5bfc7addad05510da22a94"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6929350080f4da292d111a3b33e53138fee51cec"
                }
            ],
            "title": "rxgk: Fix potential integer overflow in length check",
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}