222 lines
13 KiB
JSON
222 lines
13 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-2026-98331",
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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": "2026-09-25T10:25:14.341Z",
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"datePublished": "2026-10-06T08:46:23.481Z",
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"dateUpdated": "2026-10-19T09:17:41.508Z"
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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": "2026-10-19T09:17:41.508Z"
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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\nwifi: mac80211: unlist vifs when their netdev is unregistered\n\nmac80211 only removes vifs from the local->interfaces list when\nan interface is removed via ieee80211_if_remove(), before it\nunregisters the netdev. However, it's possible for a netdev to\nbe unregistered without going through that: When the netns that\nholds the wiphy is destroyed, the wiphy is supposed to move to\nthe init_ns, but that can run into allocation failures.\n\nThen, mac80211 has an interface listed that doesn't exist, and\nwill eventually hit\n\n BUG: failure at net/wireless/core.h:141/wiphy_to_rdev()!\n ...\n _cfg80211_unregister_wdev+0x24/0x36a [cfg80211]\n cfg80211_unregister_wdev+0x15/0x1d [cfg80211]\n ieee80211_remove_interfaces+0x1ff/0x257 [mac80211]\n ieee80211_unregister_hw+0x73/0x1d1 [mac80211]\n mac80211_hwsim_del_radio+0x114/0x166 [mac80211_hwsim]\n\nRemove the interface from the list in ->ndo_uninit if it's still\naround to avoid this."
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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:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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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 trigger is local: tearing down a netns that holds a mac80211 wiphy runs cfg80211_pernet_exit()->cfg80211_switch_netns(). When dev_change_net_namespace() fails there, default_device_exit_batch() unregisters the netdev while ieee80211_uninit() leaves its sdata on local->interfaces. No WiFi frame supplies the failing state.\nAC:H - It needs a wiphy already moved into an attacker-controlled netns (an admin step), plus a failed move back. The attacker can force the failure: an altname on the wlan netdev that clashes with an init_net name makes __dev_change_net_namespace() return -EEXIST, because cfg80211 doesn't strip altnames. The rare alternative is an allocation failure.\nPR:L - With a phy delegated to a container, root in that user-namespace-owned netns, which is unprivileged on the host, can add the altname via RTM_NEWLINKPROP and destroy the netns. Moving a phy out of init_net yourself needs init-ns CAP_NET_ADMIN, and hwsim radios made in a user netns are deleted by hwsim_exit_net() before cfg80211 runs.\nUI:N - The container root adds the altname and exits the namespace on their own. No other user has to do anything.\nS:U - This is memory corruption in the host kernel's mac80211 interface list. Exploiting it is ordinary kernel privilege escalation within the same kernel authority; no hypervisor or IOMMU boundary is involved.\nC:H - The netdev is freed via needs_free_netdev, but its sdata stays on local->interfaces. Every received frame then makes __ieee80211_rx_handle_packet() read the freed sdata through list_for_each_entry_rcu(), which gives a use-after-free read of an object an attacker can reallocate.\nI:H - Later removal of a neighbouring interface (list_del_rcu) and ieee80211_remove_interfaces() write into and dereference the stale sdata. That is a use-after-free write that heap reallocation could turn into memory corruption.\nA:H - The dangling entry crashes the kernel: the commit shows a BUG in wiphy_to_rdev() reached from ieee80211_remove_interfaces() during ieee80211_unregister_hw(), and frame RX can touch freed memory."
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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/mac80211/iface.c"
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],
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"versions": [
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{
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"version": "463d018323851a608eef52a9427b0585005c647f",
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"lessThan": "a22c02863439993095acd0c3db97fa53cd515f4f",
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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": "463d018323851a608eef52a9427b0585005c647f",
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"lessThan": "20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0",
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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": "463d018323851a608eef52a9427b0585005c647f",
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"lessThan": "b735ad1a9aca6080192c1316cf2706e5e1318762",
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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": "463d018323851a608eef52a9427b0585005c647f",
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"lessThan": "d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1",
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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": "463d018323851a608eef52a9427b0585005c647f",
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"lessThan": "821bab0456dfca12acef6df702c8f2477d313227",
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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": "463d018323851a608eef52a9427b0585005c647f",
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"lessThan": "eee2efd82867b623982ac51925b5a1812a74c50d",
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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/mac80211/iface.c"
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],
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"versions": [
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{
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"version": "2.6.32",
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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": "2.6.32",
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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": "6.1.189",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.54",
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"lessThanOrEqual": "6.18.*",
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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": "7.2.8",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.32",
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"versionEndExcluding": "6.1.189"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.32",
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"versionEndExcluding": "6.6.158"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.32",
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"versionEndExcluding": "6.12.112"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.32",
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"versionEndExcluding": "6.18.54"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.32",
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"versionEndExcluding": "7.2.8"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.32",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/a22c02863439993095acd0c3db97fa53cd515f4f"
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},
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{
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"url": "https://git.kernel.org/stable/c/20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0"
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},
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{
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"url": "https://git.kernel.org/stable/c/b735ad1a9aca6080192c1316cf2706e5e1318762"
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},
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{
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"url": "https://git.kernel.org/stable/c/d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1"
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},
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{
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"url": "https://git.kernel.org/stable/c/821bab0456dfca12acef6df702c8f2477d313227"
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},
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{
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"url": "https://git.kernel.org/stable/c/eee2efd82867b623982ac51925b5a1812a74c50d"
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}
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],
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"title": "wifi: mac80211: unlist vifs when their netdev is unregistered",
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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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}
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} |