CVE-2026-68408

{"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": "2026-10-30T12:28:30.974Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:28:30.974Z"}, "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": "28d3551f8d8cb3aec7497894d94150fe84d20e5e", "lessThan": "efe47df4de5e3e19b0670c5f2f67bdc4c9dc02af", "status": "affected", "versionType": "git"}, {"version": "37e776e2e0a523731e2470dce6d563f0e8632a40", "lessThan": "30c67926d41c456809857976cd3cd71b2290e0c1", "status": "affected", "versionType": "git"}, {"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": "72b7ea786b8e570ae11149e9089859a4a8634a13", "status": "affected", "versionType": "git"}, {"version": "6.1.167", "lessThan": "6.1.191", "status": "affected", "versionType": "semver"}, {"version": "6.6.130", "lessThan": "6.6.160", "status": "affected", "versionType": "semver"}, {"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": "6.19.10", "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": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "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": "6.1.167", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.130", "versionEndExcluding": "6.6.160"}, {"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": "6.19.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/efe47df4de5e3e19b0670c5f2f67bdc4c9dc02af"}, {"url": "https://git.kernel.org/stable/c/30c67926d41c456809857976cd3cd71b2290e0c1"}, {"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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/net/cfg80211.h", "net/wireless/core.c", "net/wireless/core.h", "net/wireless/pmsr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "efe47df4de5e3e19b0670c5f2f67bdc4c9dc02af", "status": "affected", "version": "28d3551f8d8cb3aec7497894d94150fe84d20e5e", "versionType": "git"}, {"lessThan": "30c67926d41c456809857976cd3cd71b2290e0c1", "status": "affected", "version": "37e776e2e0a523731e2470dce6d563f0e8632a40", "versionType": "git"}, {"lessThan": "21512b5f7a74fd18c996c22e6854efe57d570816", "status": "affected", "version": "d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa", "versionType": "git"}, {"lessThan": "133684982dd0c24359fcc641d19d89cc17d6e5ef", "status": "affected", "version": "a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf", "versionType": "git"}, {"lessThan": "0a77d9fb4d5c0e01306cd406ffdee8f1fe955c0e", "status": "affected", "version": "6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09", "versionType": "git"}, {"lessThan": "2b0eab425e1f658d8fe1df7590e3b9af5959505e", "status": "affected", "version": "6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09", "versionType": "git"}, {"status": "affected", "version": "72b7ea786b8e570ae11149e9089859a4a8634a13", "versionType": "git"}, {"lessThan": "6.1.191", "status": "affected", "version": "6.1.167", "versionType": "semver"}, {"lessThan": "6.6.160", "status": "affected", "version": "6.6.130", "versionType": "semver"}, {"lessThan": "6.12.101", "status": "affected", "version": "6.12.78", "versionType": "semver"}, {"lessThan": "6.18.42", "status": "affected", "version": "6.18.20", "versionType": "semver"}, {"lessThan": "6.20", "status": "affected", "version": "6.19.10", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/net/cfg80211.h", "net/wireless/core.c", "net/wireless/core.h", "net/wireless/pmsr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.0"}, {"lessThan": "7.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.101", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.42", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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()."}], "id": "CVE-2026-68408", "lastModified": "2026-10-30T13:19:44.710", "metrics": {}, "published": "2026-08-10T13:20:34.407", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a77d9fb4d5c0e01306cd406ffdee8f1fe955c0e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/133684982dd0c24359fcc641d19d89cc17d6e5ef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21512b5f7a74fd18c996c22e6854efe57d570816"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b0eab425e1f658d8fe1df7590e3b9af5959505e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/30c67926d41c456809857976cd3cd71b2290e0c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/efe47df4de5e3e19b0670c5f2f67bdc4c9dc02af"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: cfg80211: convert pmsr_free_wk to wiphy_work to fix deadlock", "id": "2513479", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513479"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-833", "details": ["A flaw was found in the Linux kernel's `wifi: cfg80211` component. A local attacker could trigger a system deadlock by performing specific concurrent operations related to wireless interface management. This race condition occurs when a wireless interface is being torn down while a related network session is simultaneously closed, causing the system to become unresponsive. This can lead to a Denial of Service (DoS)."], "name": "CVE-2026-68408", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68408\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68408\nhttps://lore.kernel.org/linux-cve-announce/2026081049-CVE-2026-68408-1611@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa,21512b5f7a74fd18c996c22e6854efe57d570816)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf,133684982dd0c24359fcc641d19d89cc17d6e5ef)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09,0a77d9fb4d5c0e01306cd406ffdee8f1fe955c0e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09,2b0eab425e1f658d8fe1df7590e3b9af5959505e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "28d3551f8d8cb3aec7497894d94150fe84d20e5e"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "37e776e2e0a523731e2470dce6d563f0e8632a40"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "72b7ea786b8e570ae11149e9089859a4a8634a13"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.78,6.12.101)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.18.20,6.18.42)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.167,6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.130,6.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.19.10,6.20)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.101,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.42,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.6,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T17:00:03.761703+00:00", "updated": "2026-08-12T11:15:03.199352+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362", "CWE-833"]}