{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-49405",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-02-26T02:08:31.566Z",
        "datePublished": "2025-02-26T02:12:30.617Z",
        "dateUpdated": "2026-08-05T08:55:02.085Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T08:55:02.085Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan()\n\nThis code has a check to prevent read overflow but it needs another\ncheck to prevent writing beyond the end of the ->Ssid[] array."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The overflow is reached only via local wireless-extensions ioctls (SIOCSIWSCAN or SIOCSIWPRIV→rtw_wx_set_priv) that deliver an attacker-crafted CSCAN buffer into rtw_wx_set_scan(); no received WiFi frame or remote peer path invokes this parser.\nAC:L - The attacker fully controls the CSCAN section type, sec_len, and payload in a single ioctl, and the missing Ssid[32] bound check makes the stack overflow deterministic with no race or attacker-uncontrollable condition.\nPR:L - wext_permission_check() requires capable(CAP_NET_ADMIN), a capability routinely held by non-root WiFi management daemons (wpa_supplicant/NetworkManager) on the phones and embedded devices this USB RTL8188EU driver targets, and this CNA consistently scores CAP_NET_ADMIN-gated WEXT bugs as PR:L.\nUI:N - The attacker issues the ioctl directly against an already-registered r8188eu interface; no victim action such as mounting media or opening a crafted file is required.\nS:U - The stack overflow corrupts kernel stack/memory within the same host kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Attacker-controlled out-of-bounds stack writes (and unbounded ssid_index growth past RTW_SSID_SCAN_AMOUNT) are memory-corruption primitives that can be leveraged for arbitrary kernel memory disclosure under standard stack-smash exploitation.\nI:H - This is a classic stack buffer overflow of Ssid[32] with attacker-chosen length and contents, enabling overwrite of adjacent stack state and return addresses for arbitrary write / control-flow hijack.\nA:H - Corrupting the on-stack ssid[RTW_SSID_SCAN_AMOUNT] array and frames beyond it reliably produces kernel oops/panic even without full code-execution exploitation."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/staging/r8188eu/os_dep/ioctl_linux.c"
                    ],
                    "versions": [
                        {
                            "version": "2b42bd58b32155a1be4dd78991845dec05aaef9e",
                            "lessThan": "ac2eab7de458f5e1210ce1237afab40a307075c8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b42bd58b32155a1be4dd78991845dec05aaef9e",
                            "lessThan": "c4bd6b72df4f01aa866ceb298466d6d07a6bd525",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b42bd58b32155a1be4dd78991845dec05aaef9e",
                            "lessThan": "476bfda0be0f9669add92bff604ca78226cf53d1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b42bd58b32155a1be4dd78991845dec05aaef9e",
                            "lessThan": "bc10916e890948d8927a5c8c40fb5dc44be5e1b8",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/staging/r8188eu/os_dep/ioctl_linux.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.46",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.17.14",
                            "lessThanOrEqual": "5.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.18.3",
                            "lessThanOrEqual": "5.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19",
                            "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": "5.15",
                                    "versionEndExcluding": "5.15.46"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "5.17.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "5.18.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "5.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ac2eab7de458f5e1210ce1237afab40a307075c8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c4bd6b72df4f01aa866ceb298466d6d07a6bd525"
                },
                {
                    "url": "https://git.kernel.org/stable/c/476bfda0be0f9669add92bff604ca78226cf53d1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bc10916e890948d8927a5c8c40fb5dc44be5e1b8"
                }
            ],
            "title": "staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan()",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}