{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31579",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.119Z",
        "datePublished": "2026-04-24T14:42:10.208Z",
        "dateUpdated": "2026-06-14T17:42:04.779Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-14T17:42:04.779Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit\n\nwg_netns_pre_exit() manually acquires rtnl_lock() inside the\npernet .pre_exit callback.  This causes a hung task when another\nthread holds rtnl_mutex - the cleanup_net workqueue (or the\nsetup_net failure rollback path) blocks indefinitely in\nwg_netns_pre_exit() waiting to acquire the lock.\n\nConvert to .exit_rtnl, introduced in commit 7a60d91c690b (\"net:\nAdd ->exit_rtnl() hook to struct pernet_operations.\"), where the\nframework already holds RTNL and batches all callbacks under a\nsingle rtnl_lock()/rtnl_unlock() pair, eliminating the contention\nwindow.\n\nThe rcu_assign_pointer(wg->creating_net, NULL) is safe to move\nfrom .pre_exit to .exit_rtnl (which runs after synchronize_rcu())\nbecause all RCU readers of creating_net either use maybe_get_net()\n- which returns NULL for a dying namespace with zero refcount - or\naccess net->user_ns which remains valid throughout the entire\nops_undo_list sequence.\n\n[ Jason: added __net_exit and __read_mostly annotations that were missing. ]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/wireguard/device.c"
                    ],
                    "versions": [
                        {
                            "version": "900575aa33a3eaaef802b31de187a85c4a4b4bd0",
                            "lessThan": "9a9e69155b2091b8297afaf1533b8d68a3096841",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "900575aa33a3eaaef802b31de187a85c4a4b4bd0",
                            "lessThan": "1c52ef00e391144334f10995985c2f256d4be982",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "900575aa33a3eaaef802b31de187a85c4a4b4bd0",
                            "lessThan": "a1d0f6cbb962af29586e3e65a4bced1a5e39221f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "900575aa33a3eaaef802b31de187a85c4a4b4bd0",
                            "lessThan": "60a25ef8dacb3566b1a8c4de00572a498e2a3bf9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "363cc6efdbb54bb06cd5034a69b41aae974a736f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.7.7",
                            "lessThan": "5.8",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/wireguard/device.c"
                    ],
                    "versions": [
                        {
                            "version": "5.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.24",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.14",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.1",
                            "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": "5.8",
                                    "versionEndExcluding": "6.18.24"
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                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.8",
                                    "versionEndExcluding": "6.19.14"
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                                    "versionStartIncluding": "5.8",
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                                    "vulnerable": true,
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                                    "versionStartIncluding": "5.7.7"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9a9e69155b2091b8297afaf1533b8d68a3096841"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1c52ef00e391144334f10995985c2f256d4be982"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a1d0f6cbb962af29586e3e65a4bced1a5e39221f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/60a25ef8dacb3566b1a8c4de00572a498e2a3bf9"
                }
            ],
            "title": "wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit",
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}