{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50655",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-08T23:57:43.372Z",
        "datePublished": "2025-12-09T00:00:30.337Z",
        "dateUpdated": "2026-05-11T19:23:03.144Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:23:03.144Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nppp: associate skb with a device at tx\n\nSyzkaller triggered flow dissector warning with the following:\n\nr0 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0802, 0x0)\nioctl$PPPIOCNEWUNIT(r0, 0xc004743e, &(0x7f00000000c0))\nioctl$PPPIOCSACTIVE(r0, 0x40107446, &(0x7f0000000240)={0x2, &(0x7f0000000180)=[{0x20, 0x0, 0x0, 0xfffff034}, {0x6}]})\npwritev(r0, &(0x7f0000000040)=[{&(0x7f0000000140)='\\x00!', 0x2}], 0x1, 0x0, 0x0)\n\n[    9.485814] WARNING: CPU: 3 PID: 329 at net/core/flow_dissector.c:1016 __skb_flow_dissect+0x1ee0/0x1fa0\n[    9.485929]  skb_get_poff+0x53/0xa0\n[    9.485937]  bpf_skb_get_pay_offset+0xe/0x20\n[    9.485944]  ? ppp_send_frame+0xc2/0x5b0\n[    9.485949]  ? _raw_spin_unlock_irqrestore+0x40/0x60\n[    9.485958]  ? __ppp_xmit_process+0x7a/0xe0\n[    9.485968]  ? ppp_xmit_process+0x5b/0xb0\n[    9.485974]  ? ppp_write+0x12a/0x190\n[    9.485981]  ? do_iter_write+0x18e/0x2d0\n[    9.485987]  ? __import_iovec+0x30/0x130\n[    9.485997]  ? do_pwritev+0x1b6/0x240\n[    9.486016]  ? trace_hardirqs_on+0x47/0x50\n[    9.486023]  ? __x64_sys_pwritev+0x24/0x30\n[    9.486026]  ? do_syscall_64+0x3d/0x80\n[    9.486031]  ? entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nFlow dissector tries to find skb net namespace either via device\nor via socket. Neigher is set in ppp_send_frame, so let's manually\nuse ppp->dev."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ppp/ppp_generic.c"
                    ],
                    "versions": [
                        {
                            "version": "d58e468b1112dcd1d5193c0a89ff9f98b5a3e8b9",
                            "lessThan": "7da524781c531ebaf2f94c9dc4c541b82edecfed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d58e468b1112dcd1d5193c0a89ff9f98b5a3e8b9",
                            "lessThan": "148dcbd3af039ae39c3af697a3183008c7995805",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d58e468b1112dcd1d5193c0a89ff9f98b5a3e8b9",
                            "lessThan": "4b8f3b939266c90f03b7cc7e26a4c28c7b64137b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d58e468b1112dcd1d5193c0a89ff9f98b5a3e8b9",
                            "lessThan": "18dc946360bfe0de016a59e3cc3ee1f450fceb9d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d58e468b1112dcd1d5193c0a89ff9f98b5a3e8b9",
                            "lessThan": "ee678b1f52f9439e930db2db3fd7e345d03e1a50",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d58e468b1112dcd1d5193c0a89ff9f98b5a3e8b9",
                            "lessThan": "9f225444467b98579cf28d94f4ad053460dfdb84",
                            "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/net/ppp/ppp_generic.c"
                    ],
                    "versions": [
                        {
                            "version": "4.20",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.20",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.229",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.163",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.86",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.16",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.2",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2",
                            "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": "4.20",
                                    "versionEndExcluding": "5.4.229"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "5.10.163"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "5.15.86"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.0.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.1.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "6.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7da524781c531ebaf2f94c9dc4c541b82edecfed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/148dcbd3af039ae39c3af697a3183008c7995805"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4b8f3b939266c90f03b7cc7e26a4c28c7b64137b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/18dc946360bfe0de016a59e3cc3ee1f450fceb9d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ee678b1f52f9439e930db2db3fd7e345d03e1a50"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9f225444467b98579cf28d94f4ad053460dfdb84"
                }
            ],
            "title": "ppp: associate skb with a device at tx",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}