{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-99061", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.388Z", "datePublished": "2026-10-23T12:22:59.770Z", "dateUpdated": "2026-10-30T12:41:26.663Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:41:26.663Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: fix P2P device removal race in brcmf_detach()\n\nWhen the driver is removed while the user space process that created\nthe P2P device (e.g. wpa_supplicant) is still exiting, the P2P device\ninterface is removed twice and the kernel crashes.\n\nThe two paths are:\n\n - wpa_supplicant, on exit, sends NL80211_CMD_DEL_INTERFACE for the P2P\n device. nl80211_del_interface() holds RTNL and the wiphy mutex and\n calls brcmf_p2p_del_vif(), which disables discovery and waits up to\n 1.5 s for BRCMF_E_IF_DEL. Then it calls brcmf_remove_interface(),\n which unregisters the wdev and frees the vif and the ifp.\n\n - brcmf_detach() sets the bus down, so BRCMF_E_IF_DEL never arrives,\n and calls brcmf_remove_interface(ifp, false) for the same ifp.\n brcmf_p2p_ifp_removed() reads ifp->vif and then blocks on\n rtnl_lock(). When brcmf_p2p_del_vif() releases RTNL, it calls\n cfg80211_unregister_wdev() on the wdev that was already unregistered\n and freed.\n\nThe second list_del_rcu() of wdev->list faults on LIST_POISON2:\n\n brcmfmac: brcmf_p2p_del_vif delete P2P vif\n brcmfmac: brcmf_p2p_deinit_discovery enter\n brcmfmac: brcmf_p2p_del_vif P2P: GO_NEG_PHASE status cleared\n brcmfmac: brcmf_detach Enter\n brcmfmac: brcmf_bus_change_state 1 -> 0\n brcmfmac: brcmf_remove_interface Enter, bsscfgidx=1, ifidx=0\n brcmfmac: brcmf_del_if Enter, bsscfgidx=1, ifidx=0\n brcmfmac: brcmf_p2p_ifp_removed P2P: device interface removed\n [1.5 s later, brcmf_p2p_del_vif() timed out]\n brcmfmac: brcmf_remove_interface Enter, bsscfgidx=1, ifidx=0\n brcmfmac: brcmf_del_if Enter, bsscfgidx=1, ifidx=0\n brcmfmac: brcmf_p2p_ifp_removed P2P: device interface removed\n Unable to handle kernel paging request at virtual address dead000000000122\n Internal error: Oops: 96000044 [#1] PREEMPT_RT SMP\n pc : _cfg80211_unregister_wdev+0x6c/0x264 [cfg80211]\n Call trace:\n _cfg80211_unregister_wdev+0x6c/0x264 [cfg80211]\n cfg80211_unregister_wdev+0x10/0x1c [cfg80211]\n brcmf_p2p_ifp_removed+0x84/0xb0 [brcmfmac]\n brcmf_remove_interface+0x1f4/0x254 [brcmfmac]\n brcmf_detach+0x88/0x180 [brcmfmac]\n brcmf_sdio_remove+0x90/0x7b0 [brcmfmac]\n brcmf_sdiod_remove+0x20/0xa0 [brcmfmac]\n brcmf_ops_sdio_remove+0xbc/0x12c [brcmfmac]\n sdio_bus_remove+0x38/0x144\n device_release_driver_internal+0x1e8/0x2c0\n device_release_driver+0x14/0x20\n brcmf_sdio_bus_remove+0x2c/0x40 [brcmfmac]\n brcmf_fwvid_unregister_vendor+0xd8/0x170 [brcmfmac]\n __exit_compat+0x18/0x418 [brcmfmac_cyw]\n __arm64_sys_delete_module+0x1ac/0x244\n\nThe log was taken with debug=0x406 on an i.MX 8M Plus board with a\nCYW55513 (Sona IF513) on SDIO. The driver is the Ezurio backport of\nbrcmfmac from v6.18.22 on a 5.4-rt kernel. The code involved is the same\nin mainline.\n\nTo reproduce:\n\n 1. Start wpa_supplicant on wlan0 and let it associate. It creates the\n P2P device (iw dev shows \"type P2P-device\").\n 2. Stop wpa_supplicant and remove the driver without waiting for\n wpa_supplicant to exit:\n\n kill $(pidof wpa_supplicant)\n rmmod brcmfmac_cyw brcmfmac\n\nThe crash is reproducible on that board.\n\nFor the interface without a netdev (the P2P device), take RTNL and the\nwiphy mutex in brcmf_detach() before reading iflist, and remove it with\nlocked=true. If brcmf_p2p_del_vif() runs first, brcmf_detach() finds the\nslot empty. If brcmf_detach() runs first, nl80211 does not find the wdev\nany more. The interfaces with a netdev are removed as before, because\nbrcmf_del_if() takes RTNL on its own for the primary interface." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c" ], "versions": [ { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "75e917473e20dea61f837f9afb5fc3435c9200d2", "status": "affected", "versionType": "git" }, { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "c4c0659eb74f807e0e73742b101a07b0bb703d97", "status": "affected", "versionType": "git" }, { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "0f84eec09039deb9229fd35c55912a2397d3ae55", "status": "affected", "versionType": "git" }, { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "7b79131e357c4786765b20a994ad40d4d35f2163", "status": "affected", "versionType": "git" }, { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "2e0c8c60a11b3177e7432c71d41249e276a0825f", "status": "affected", "versionType": "git" }, { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "eef16a74ff8ed2a838d6bb862bb2c7783fce7466", "status": "affected", "versionType": "git" }, { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "47ca6395a1d91545cc9403f9218bc61be941a0c3", "status": "affected", "versionType": "git" }, { "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d", "lessThan": "08a3f02fea636e97a7422d1512f76dacdb5b0887", "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/wireless/broadcom/brcm80211/brcmfmac/core.c" ], "versions": [ { "version": "4.4", "status": "affected" }, { "version": "0", "lessThan": "4.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.224", "lessThanOrEqual": "5.15.*", "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": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "4.4", "versionEndExcluding": "5.10.273" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.15.224" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.1.191" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.6.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.12.113" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.18.57" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.2.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/75e917473e20dea61f837f9afb5fc3435c9200d2" }, { "url": "https://git.kernel.org/stable/c/c4c0659eb74f807e0e73742b101a07b0bb703d97" }, { "url": "https://git.kernel.org/stable/c/0f84eec09039deb9229fd35c55912a2397d3ae55" }, { "url": "https://git.kernel.org/stable/c/7b79131e357c4786765b20a994ad40d4d35f2163" }, { "url": "https://git.kernel.org/stable/c/2e0c8c60a11b3177e7432c71d41249e276a0825f" }, { "url": "https://git.kernel.org/stable/c/eef16a74ff8ed2a838d6bb862bb2c7783fce7466" }, { "url": "https://git.kernel.org/stable/c/47ca6395a1d91545cc9403f9218bc61be941a0c3" }, { "url": "https://git.kernel.org/stable/c/08a3f02fea636e97a7422d1512f76dacdb5b0887" } ], "title": "wifi: brcmfmac: fix P2P device removal race in brcmf_detach()", "x_generator": { "engine": "bippy-1.2.0" } } } }