264 lines
15 KiB
JSON
264 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-2026-90016",
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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": "2026-09-11T19:38:34.781Z",
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"datePublished": "2026-09-16T10:33:22.148Z",
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"dateUpdated": "2026-10-30T12:33:49.384Z"
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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": "2026-10-30T12:33:49.384Z"
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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\nstaging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()\n\nrtw_restruct_wmm_ie() scans in_ie for a WMM IE with:\n\n\twhile (i < in_len) {\n\t\t...\n\t\tif (i + 5 < in_len && in_ie[i] == 0xDD && ...) {\n\t\t\t...\n\t\t\tbreak;\n\t\t}\n\t\ti += (in_ie[i + 1] + 2); /* to the next IE element */\n\t}\n\nWhen the \"i + 5 < in_len\" match check fails simply because i is\nwithin 5 bytes of the end of the buffer (i.e. no WMM IE was found\nnear the tail of in_ie), execution falls through to\n\"i += (in_ie[i + 1] + 2)\", which reads in_ie[i + 1]. If i == in_len\n- 1 at that point, this is a 1-byte out-of-bounds read of an\nattacker-influenced IE buffer built from association/scan data.\n\nCommit a75281626fc8f (\"staging: rtl8723bs: fix potential\nout-of-bounds read in rtw_restruct_wmm_ie\") added the \"i + 5 <\nin_len\" guard to the match condition itself, but did not add an\nequivalent guard before the fallthrough advance, so the same class\nof OOB read remained reachable through the non-matching path.\n\nAdd an explicit bounds check before advancing to the next IE."
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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 - rtw_restruct_wmm_ie() walks WMM IEs from scanned BSS candidates filled by collect_bss_info() from over-the-air beacon and probe-response frames (OnBeacon/OnProbeRsp). The attacker must be in WiFi radio range; kernel guidance maps WiFi frame injection to Adjacent.\nAC:L - The attacker fully controls beacon/probe IE layout and can place a truncated tail IE so the walker lands at in_len-1, making the unguarded in_ie[i+1] read deterministic. wmm_enable defaults to 1, and no race or attacker-uncontrollable memory layout is required.\nPR:N - Scan and join/roam consume attacker beacon IEs before any authentication with the rogue BSS. No local account, capability, or user-namespace privilege is required.\nUI:N - RTW_ROAM_ON_EXPIRED is enabled by default, so association expiry or an attacker-driven reconnect automatically calls rtw_select_and_join_from_scanned_queue() without a new victim click. An evil-twin BSS matching the desired SSID is selected by RSSI during normal WiFi operation.\nS:U - The out-of-bounds read and any resulting kernel impact remain inside the rtl8723bs driver on the host. This is not a VM escape, IOMMU bypass, or other cross-authority boundary crossing.\nC:L - The fallthrough path reads exactly one byte past the declared IE length (in_ie[i+1] when i==in_len-1). Kernel guidance scores a strictly bounded few-byte out-of-bounds read as Low confidentiality rather than an arbitrary-read primitive.\nI:N - The bug only reads in_ie[i+1] to compute the next IE offset and then exits the loop. It does not write out of bounds or provide a data-modification or control-flow hijack primitive.\nA:H - An out-of-bounds kernel read can oops or panic on hardened, KASAN, or redzone kernels, and an adjacent attacker can retrigger the join/roam path with further crafted management frames to deny availability."
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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/staging/rtl8723bs/core/rtw_mlme.c"
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],
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"versions": [
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{
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"status": "affected",
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{
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"product": "Linux",
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"defaultStatus": "affected",
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"drivers/staging/rtl8723bs/core/rtw_mlme.c"
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],
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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": "4.12",
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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": "5.10.273",
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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": "5.15.224",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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"version": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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},
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"version": "6.6.160",
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"status": "unaffected",
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},
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"version": "6.12.112",
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"status": "unaffected",
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},
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{
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"version": "6.18.52",
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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": "7.2.5",
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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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"url": "https://git.kernel.org/stable/c/a8d76480d1abbbf617c2d6d9f60bf95ab45cff04"
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{
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"url": "https://git.kernel.org/stable/c/716850842d2f103f915fe7c857ff1a0a036491b4"
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},
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"url": "https://git.kernel.org/stable/c/4420cc71841b50e31a7868ef7acb011c0e08d294"
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},
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{
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"url": "https://git.kernel.org/stable/c/fd19b8895f8a91087e8a62f1e27b128025dabb95"
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},
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{
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"url": "https://git.kernel.org/stable/c/28a289beaf226b30b1e6e7d7b1a2946fe2d6e852"
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}
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],
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"title": "staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()",
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