305 lines
15 KiB
JSON
305 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-2024-40929",
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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": "2024-07-12T12:17:45.583Z",
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"datePublished": "2024-07-12T12:25:08.434Z",
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"dateUpdated": "2026-08-05T11:34:05.245Z"
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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": "2026-08-05T11:34:05.245Z"
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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: iwlwifi: mvm: check n_ssids before accessing the ssids\n\nIn some versions of cfg80211, the ssids poinet might be a valid one even\nthough n_ssids is 0. Accessing the pointer in this case will cuase an\nout-of-bound access. Fix this by checking n_ssids first."
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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:L/PR:N/UI:N/S:U/C:L/I:N/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 - The vulnerable branch is only reached through cfg80211's split 6 GHz scan, whose request layout and channel count are built from co-located-AP (RNR) information carried in beacons/probe responses received over the air, so an attacker within WiFi radio range shapes the allocation that is read out of bounds. Per WiFi-frame guidance this is Adjacent rather than Local.\nAC:L - The attacker can beacon crafted RNR elements continuously and vary the advertised co-located-AP count to sweep allocation layouts, while 6 GHz-capable iwlwifi clients perform passive scans routinely, so the condition can be retried until it hits.\nPR:N - An adjacent attacker needs no account or credentials on the target; the passive 6 GHz scan that walks the buggy code is initiated automatically by the system's normal background scanning rather than by any attacker-held privilege.\nUI:N - Periodic passive scanning by NetworkManager/wpa_supplicant drives the vulnerable path with no action from the logged-in user.\nS:U - The out-of-bounds read stays inside the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:L - The read is a single byte at a fixed offset 32 past the ssids pointer and is never copied to userspace or the air; it only selects between two hard-coded dwell budgets (100 vs 300 TU), which yields at most a timing-observable one-bit oracle on adjacent kernel heap memory.\nI:N - Nothing is written out of bounds — the only side effect is that one of two legitimate constant values is placed in the firmware scan command's adwell_max_budget field.\nA:H - The access reads up to 33 bytes past the end of a kzalloc'd scan request; on KASAN or hardened kernels this is a slab-out-of-bounds report that panics under panic_on_warn/kasan.fault=panic, and a page-order allocation ending on a page boundary can fault and oops."
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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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"drivers/net/wireless/intel/iwlwifi/mvm/scan.c"
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],
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"versions": [
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{
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"version": "c1a7515393e403758a684fd0a2372af466675b15",
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"lessThan": "3c4771091ea8016c8601399078916f722dd8833b",
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"status": "affected",
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"versionType": "git"
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"programFiles": [
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"drivers/net/wireless/intel/iwlwifi/mvm/scan.c"
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],
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"versions": [
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{
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"version": "4.17",
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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": "4.17",
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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": "5.10.221",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.15.162",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "6.1.95",
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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": "6.6.35",
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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": "6.9.6",
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"lessThanOrEqual": "6.9.*",
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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": "6.10",
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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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"versionStartIncluding": "4.17",
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}
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],
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"title": "wifi: iwlwifi: mvm: check n_ssids before accessing the ssids",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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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"id": "CVE-2024-40929",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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"Technical Impact": "partial"
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"timestamp": "2024-09-10T17:05:05.324309Z"
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],
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"title": "CISA ADP Vulnrichment",
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} |