{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-68408",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-30T09:28:09.390Z",
        "datePublished": "2026-08-10T12:04:28.172Z",
        "dateUpdated": "2026-08-17T05:04:58.708Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:04:58.708Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: convert pmsr_free_wk to wiphy_work to fix deadlock\n\nWhen a netlink socket that owns a PMSR session is closed,\ncfg80211_release_pmsr() clears the request's nl_portid and queues\npmsr_free_wk to call cfg80211_pmsr_process_abort() asynchronously.\n\nIf the interface tears down concurrently, cfg80211_pmsr_wdev_down()\nis called under wiphy_lock and calls cancel_work_sync(&pmsr_free_wk)\nto wait for any running work. The work function acquires wiphy_lock\nvia guard(wiphy) before calling process_abort.\n\nThis is a deadlock: wdev_down holds wiphy_lock and blocks inside\ncancel_work_sync(); pmsr_free_wk blocks trying to acquire that same\nwiphy_lock. Neither thread can proceed.\n\nThe same deadlock is reachable from cfg80211_leave_locked(), which\ncalls cfg80211_pmsr_wdev_down() for all interface types under\nwiphy_lock.\n\nFix this by converting pmsr_free_wk from a plain work_struct to a\nwiphy_work. The wiphy_work dispatcher holds wiphy_lock when running\nwork items, so the explicit guard(wiphy) in the work function is no\nlonger needed. wiphy_work_cancel() can be called safely while holding\nwiphy_lock - since wiphy_lock prevents the work from running\nconcurrently, wiphy_work_cancel() never blocks, eliminating the\ndeadlock.\n\nRemove the cancel_work_sync() for pmsr_free_wk from the\nNETDEV_GOING_DOWN handler. cfg80211_leave(), called unconditionally\njust before it, already cancels any pending work under wiphy_lock\nvia wiphy_work_cancel() inside cfg80211_pmsr_wdev_down()."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/cfg80211.h",
                        "net/wireless/core.c",
                        "net/wireless/core.h",
                        "net/wireless/pmsr.c"
                    ],
                    "versions": [
                        {
                            "version": "d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa",
                            "lessThan": "21512b5f7a74fd18c996c22e6854efe57d570816",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf",
                            "lessThan": "133684982dd0c24359fcc641d19d89cc17d6e5ef",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09",
                            "lessThan": "0a77d9fb4d5c0e01306cd406ffdee8f1fe955c0e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09",
                            "lessThan": "2b0eab425e1f658d8fe1df7590e3b9af5959505e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "28d3551f8d8cb3aec7497894d94150fe84d20e5e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "37e776e2e0a523731e2470dce6d563f0e8632a40",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "72b7ea786b8e570ae11149e9089859a4a8634a13",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.12.78",
                            "lessThan": "6.12.101",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.20",
                            "lessThan": "6.18.42",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThan": "6.2",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThan": "6.7",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.10",
                            "lessThan": "6.20",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "include/net/cfg80211.h",
                        "net/wireless/core.c",
                        "net/wireless/core.h",
                        "net/wireless/pmsr.c"
                    ],
                    "versions": [
                        {
                            "version": "7.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "7.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.101",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.42",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.6",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.12.78",
                                    "versionEndExcluding": "6.12.101"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18.20",
                                    "versionEndExcluding": "6.18.42"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.0",
                                    "versionEndExcluding": "7.1.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.0",
                                    "versionEndExcluding": "7.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.167"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.130"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.19.10"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/21512b5f7a74fd18c996c22e6854efe57d570816"
                },
                {
                    "url": "https://git.kernel.org/stable/c/133684982dd0c24359fcc641d19d89cc17d6e5ef"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0a77d9fb4d5c0e01306cd406ffdee8f1fe955c0e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2b0eab425e1f658d8fe1df7590e3b9af5959505e"
                }
            ],
            "title": "wifi: cfg80211: convert pmsr_free_wk to wiphy_work to fix deadlock",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}