{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-49808",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-05-01T14:05:17.226Z",
        "datePublished": "2025-05-01T14:09:34.130Z",
        "dateUpdated": "2026-05-11T19:07:11.386Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:07:11.386Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: don't leak tagger-owned storage on switch driver unbind\n\nIn the initial commit dc452a471dba (\"net: dsa: introduce tagger-owned\nstorage for private and shared data\"), we had a call to\ntag_ops->disconnect(dst) issued from dsa_tree_free(), which is called at\ntree teardown time.\n\nThere were problems with connecting to a switch tree as a whole, so this\ngot reworked to connecting to individual switches within the tree. In\nthis process, tag_ops->disconnect(ds) was made to be called only from\nswitch.c (cross-chip notifiers emitted as a result of dynamic tag proto\nchanges), but the normal driver teardown code path wasn't replaced with\nanything.\n\nSolve this problem by adding a function that does the opposite of\ndsa_switch_setup_tag_protocol(), which is called from the equivalent\nspot in dsa_switch_teardown(). The positioning here also ensures that we\nwon't have any use-after-free in tagging protocol (*rcv) ops, since the\nteardown sequence is as follows:\n\ndsa_tree_teardown\n-> dsa_tree_teardown_master\n   -> dsa_master_teardown\n      -> unsets master->dsa_ptr, making no further packets match the\n         ETH_P_XDSA packet type handler\n-> dsa_tree_teardown_ports\n   -> dsa_port_teardown\n      -> dsa_slave_destroy\n         -> unregisters DSA net devices, there is even a synchronize_net()\n            in unregister_netdevice_many()\n-> dsa_tree_teardown_switches\n   -> dsa_switch_teardown\n      -> dsa_switch_teardown_tag_protocol\n         -> finally frees the tagger-owned storage"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/dsa/dsa2.c"
                    ],
                    "versions": [
                        {
                            "version": "7f2973149c22e7a6fee4c0c9fa6b8e4108e9c208",
                            "lessThan": "5809fb03942dbac25144db5bebea84fa003ecaca",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7f2973149c22e7a6fee4c0c9fa6b8e4108e9c208",
                            "lessThan": "4e0c19fcb8b5323716140fa82b79aa9f60e60407",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/dsa/dsa2.c"
                    ],
                    "versions": [
                        {
                            "version": "5.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.10",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1",
                            "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": "5.17",
                                    "versionEndExcluding": "6.0.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.17",
                                    "versionEndExcluding": "6.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/5809fb03942dbac25144db5bebea84fa003ecaca"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4e0c19fcb8b5323716140fa82b79aa9f60e60407"
                }
            ],
            "title": "net: dsa: don't leak tagger-owned storage on switch driver unbind",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}