306 lines
15 KiB
JSON
306 lines
15 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-2024-26666",
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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": "2024-02-19T14:20:24.149Z",
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"datePublished": "2024-04-02T06:22:14.974Z",
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"dateUpdated": "2026-08-05T11:26:41.038Z"
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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": "2026-08-05T11:26:41.038Z"
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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: fix RCU use in TDLS fast-xmit\n\nThis looks up the link under RCU protection, but isn't\nguaranteed to actually have protection. Fix that."
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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:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H",
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"baseScore": 7.1,
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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:A - This is mac80211 client-side TDLS/MLO transmit code; both sides of the exposure (AP-MLD link reconfiguration that tears down `sdata->link[]`, and TDLS-peer state/power-save transitions that re-run `ieee80211_check_fast_xmit()`) are driven by 802.11 peers on the same WLAN. Per WiFi guidance this is Adjacent, not Network.\nAC:H - Exploitation requires conditions the attacker cannot influence: an 802.11be MLD association with a TDLS peer on a separately-allocated link (non-MLO stations use the embedded `sdata->deflink`, which is never freed), plus a kernel config where the enclosing `spin_lock_bh(&sta->lock)` does not already imply an RCU read-side section — on non-preemptible RCU it does, and on PREEMPT_RT `local_bh_disable()` explicitly calls `rcu_read_lock()`, so `synchronize_rcu()` in `ieee80211_tear_down_links()` cannot complete during the window on common configurations.\nPR:N - An over-the-air attacker (rogue/controlled AP MLD triggering link reconfiguration, or a TDLS peer) holds no privileges or account on the victim host. No local credentials or capabilities on the vulnerable system are needed.\nUI:N - Association to the AP MLD and TDLS session setup are performed automatically by the supplicant for configured networks, and the `ieee80211_check_fast_xmit()` triggers (STA authorization, PS transitions, key install, CLEAR_PS_FILT on TX) all occur without any operator action.\nS:U - The unprotected dereference, the freed `link_container`, and any resulting fault all live within the kernel's own security authority. No VM, sandbox, or IOMMU boundary is crossed.\nC:H - Winning the race yields a use-after-free read of the freed `link_container`, and the 6 stale bytes are written into `addr3` of the cached 802.11 header and then transmitted, exposing freed kernel heap contents to any passive sniffer; the fast-xmit cache is rebuilt repeatedly, so the slot can be resampled as it is reallocated to different objects.\nI:L - There is no write to freed memory and no out-of-bounds write — the only integrity effect is that outbound TDLS frames carry a corrupted BSSID, and on the pre-fix `WARN_ON_ONCE(!link)` path a `hdr_len == 0` cache entry produces malformed frames whose 802.11 header is overwritten by the RFC1042 SNAP.\nA:H - Dereferencing the freed link can oops when the backing slab page has been returned to the allocator or is poisoned under KASAN/KFENCE/SLUB_DEBUG, and the `WARN_ON_ONCE(!link)` on a torn-down link is fatal on the widely-used `panic_on_warn` configurations."
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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/tx.c"
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],
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"versions": [
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{
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"version": "8cc07265b69141f8ed9597d0f27185239c241c80",
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{
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"product": "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/tx.c"
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],
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"versions": [
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{
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"version": "6.5",
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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": "6.5",
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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": "6.6.17",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.7.5",
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"lessThanOrEqual": "6.7.*",
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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": "6.8",
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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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"nodes": [
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"operator": "OR",
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"versionStartIncluding": "6.5",
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"versionEndExcluding": "6.6.17"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fc3432ae8232ff4025e7c55012dd88db0e3d18eb"
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},
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{
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"url": "https://git.kernel.org/stable/c/c255c3b653c6e8b52ac658c305e2fece2825f7ad"
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},
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"url": "https://git.kernel.org/stable/c/9480adfe4e0f0319b9da04b44e4eebd5ad07e0cd"
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}
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],
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"title": "wifi: mac80211: fix RCU use in TDLS fast-xmit",
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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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"type": "CWE",
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"lang": "en",
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"description": "CWE-noinfo Not enough information"
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}
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]
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"affected": [
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{
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"vendor": "linux",
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"product": "linux_kernel",
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{
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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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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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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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": "2024-11-04T16:57:36.655308Z",
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"id": "CVE-2024-26666",
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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": "total"
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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": "2024-11-04T17:03:18.143Z"
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"dateUpdated": "2024-08-02T00:14:12.542Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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