356 lines
18 KiB
JSON
356 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2021-47194",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-03-25T09:12:14.114Z",
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"datePublished": "2024-04-10T18:56:31.361Z",
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"dateUpdated": "2026-08-05T08:46:38.073Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:46:38.073Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncfg80211: call cfg80211_stop_ap when switch from P2P_GO type\n\nIf the userspace tools switch from NL80211_IFTYPE_P2P_GO to\nNL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it\ndoes not call the cleanup cfg80211_stop_ap(), this leads to the\ninitialization of in-use data. For example, this path re-init the\nsdata->assigned_chanctx_list while it is still an element of\nassigned_vifs list, and makes that linked list corrupt."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerability is triggered exclusively via local nl80211 Generic Netlink (NL80211_CMD_SET_INTERFACE → nl80211_set_interface → cfg80211_change_iface), not by processing over-the-air WiFi frames or remote network packets.\nAC:L - An attacker fully controls the sequence—set the interface to P2P_GO, start AP (assigning the chanctx), then SET_INTERFACE to ADHOC—and reliably causes INIT_LIST_HEAD on an still-linked assigned_chanctx_list with no attacker-independent race or external timing.\nPR:L - NL80211_CMD_SET_INTERFACE uses GENL_UNS_ADMIN_PERM, requiring only CAP_NET_ADMIN in the socket netns user namespace; with mac80211_hwsim (also GENL_UNS_ADMIN_PERM) or a wiphy in that netns this is reachable via unshare -Urn, so privileges score Low per CNA guidance.\nUI:N - The attacker issues the netlink commands themselves to change the interface type; no separate victim action such as mounting a filesystem or approving a prompt is required.\nS:U - Impact stays within the host kernel wireless/mac80211 authority (local list corruption / privilege-escalation class) and does not cross a VM, IOMMU, or other separate security boundary.\nC:H - INIT_LIST_HEAD on an in-use assigned_chanctx_list corrupts the chanctx assigned_vifs list, and subsequent walks dereference poisoned/reused pointers; this list-corruption class enables heap reuse and arbitrary kernel memory disclosure primitives.\nI:H - Corrupted list_head unlink/walk paths over attacker-influenced heap state yield classic arbitrary-write and control-flow hijack primitives, matching High integrity impact for kernel list corruption.\nA:H - Syzbot reproduces a general protection fault in ieee80211_chanctx_num_assigned when walking the corrupted assigned_vifs list, causing a kernel oops/panic and full denial of service."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/wireless/util.c"
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],
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"versions": [
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{
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"version": "ac800140c20e7ae51117e71289065bedd4930fc2",
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"lessThan": "8f06bb8c216bcd172394f61e557727e691b4cb24",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ac800140c20e7ae51117e71289065bedd4930fc2",
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"lessThan": "0738cdb636c21ab552eaecf905efa4a6070e3ebc",
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"status": "affected",
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"lessThan": "4e458abbb4a523f1413bfe15c079cf4e24c15b21",
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{
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"lessThan": "52affc201fc22a1ab9a59ef0ed641a9adfcb8d13",
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"status": "affected",
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},
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"lessThan": "7b97b5776daa0b39dbdadfea176f9cc0646d4a66",
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"status": "affected",
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{
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"version": "ac800140c20e7ae51117e71289065bedd4930fc2",
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"lessThan": "5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd",
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"status": "affected",
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},
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{
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"version": "ac800140c20e7ae51117e71289065bedd4930fc2",
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"lessThan": "563fbefed46ae4c1f70cffb8eb54c02df480b2c2",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/wireless/util.c"
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],
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"versions": [
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{
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"version": "3.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.4.293",
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"lessThanOrEqual": "4.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.9.291",
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"lessThanOrEqual": "4.9.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.14.256",
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"lessThanOrEqual": "4.14.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.19.218",
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"lessThanOrEqual": "4.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.4.162",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.82",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.5",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.16",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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"nodes": [
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{
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"url": "https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13"
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"url": "https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66"
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"url": "https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2"
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}
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],
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"title": "cfg80211: call cfg80211_stop_ap when switch from P2P_GO type",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-21T16:05:05.968362Z",
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"id": "CVE-2021-47194",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-06-21T16:05:16.617Z"
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"dateUpdated": "2024-08-04T05:32:07.292Z"
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"title": "CVE Program Container",
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