{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90016", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.781Z", "datePublished": "2026-09-16T10:33:22.148Z", "dateUpdated": "2026-09-16T14:41:34.346Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-16T14:41:34.346Z"}, "descriptions": [{"lang": "en", "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme.c"], "versions": [{"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "4420cc71841b50e31a7868ef7acb011c0e08d294", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "fd19b8895f8a91087e8a62f1e27b128025dabb95", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "28a289beaf226b30b1e6e7d7b1a2946fe2d6e852", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.3-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4420cc71841b50e31a7868ef7acb011c0e08d294"}, {"url": "https://git.kernel.org/stable/c/fd19b8895f8a91087e8a62f1e27b128025dabb95"}, {"url": "https://git.kernel.org/stable/c/28a289beaf226b30b1e6e7d7b1a2946fe2d6e852"}], "title": "staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4420cc71841b50e31a7868ef7acb011c0e08d294", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "fd19b8895f8a91087e8a62f1e27b128025dabb95", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}, {"lessThan": "28a289beaf226b30b1e6e7d7b1a2946fe2d6e852", "status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-90016", "lastModified": "2026-09-16T15:18:25.227", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-16T11:17:14.360", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/28a289beaf226b30b1e6e7d7b1a2946fe2d6e852"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4420cc71841b50e31a7868ef7acb011c0e08d294"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd19b8895f8a91087e8a62f1e27b128025dabb95"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}