244 lines
13 KiB
JSON
244 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-2026-93063",
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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": "2026-09-17T15:57:05.660Z",
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"datePublished": "2026-09-17T16:10:49.112Z",
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"dateUpdated": "2026-10-19T09:04:59.220Z"
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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": "2026-10-19T09:04:59.220Z"
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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: mei: check SAP message length before reading it\n\nVerify the SAP message size is not larger than the local buffer before\nreading the message to avoid buffer overflow."
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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:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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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 oversized iwl_sap_hdr.len is written by CSME into the DMA-mapped ME-to-host SAP notification queue and consumed in iwl_mei_handle_sap_rx_cmd after iwl_mei_rx() handles SAP_ME_MSG_CHECK_SHARED_AREA on the MEI RX callback (mei_cldev_register_rx_cb). 802.11 frames use the separate data queue and iwl_mei_handle_sap_data(), so this is a local coprocessor path.\nAC:L - CSME fully controls the little-endian hdr->len used as the memcpy length in iwl_mei_read_from_q(). The valid_rx_sz check only keeps the copy inside the 62720-byte SAP_M2H_NOTIF_Q_SZ, which still far exceeds the alloc_page() destination, so an oversized len overflows that page deterministically with no race.\nPR:N - iwl_mei_enable() registers iwl_mei_rx as the MEI RX callback at probe with no Linux credential or capability check. Compromised CSME firmware can emit SAP_ME_MSG_CHECK_SHARED_AREA and a crafted notification without any host account.\nUI:N - iwl_mei_probe() maps shared memory, enables the MEI client, and sends SAP_ME_MSG_START; CSME can then post CHECK_SHARED_AREA and the oversized notification on its own. No victim open, mount, or click is required.\nS:U - The overflow writes past a host-kernel alloc_page() buffer into adjacent pages in the same kernel that contains iwlmei. The mei_cldev_dma_map() window is the intended CSME shared area, not an IOMMU bypass, VM escape, or other changed-scope boundary.\nC:H - iwl_mei_read_from_q() copies tens of KB of CSME-chosen payload past the 4 KiB page into neighboring page-allocator contents. That kernel-memory corruption is leverageable for high-confidentiality disclosure of adjacent objects.\nI:H - The same memcpy is an out-of-bounds write of CSME-controlled bytes past the alloc_page() buffer into adjacent kernel pages, a primitive that can corrupt neighboring objects and hijack kernel control flow.\nA:H - Writing tens of KB past a single alloc_page() into unmapped or neighboring pages produces a kernel oops or panic in iwl_mei_handle_sap_rx_cmd, so availability impact is high."
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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/mei/main.c"
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],
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"versions": [
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{
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"version": "a29e442ee110aafdf7785fac6de44b22d3da43db",
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"lessThan": "a4034f1cc8a422cefc519290d8e6cfb7ff773586",
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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": "bcd68b3dbe78b7b0f7b6b55162cf1eff1e7fff9e",
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"lessThan": "b90ebae632318dc2e5cd4ac96e454ec50f705579",
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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": "bcd68b3dbe78b7b0f7b6b55162cf1eff1e7fff9e",
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"lessThan": "9c6bea89a16815688a5240dd4a74c922a92fcdc3",
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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": "bcd68b3dbe78b7b0f7b6b55162cf1eff1e7fff9e",
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"lessThan": "242125bbf19a2974d22f3d5025c9c14c0a4aea58",
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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": "bcd68b3dbe78b7b0f7b6b55162cf1eff1e7fff9e",
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"lessThan": "f7f770d12e6e928006f89a59291074e5fea82886",
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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": "bcd68b3dbe78b7b0f7b6b55162cf1eff1e7fff9e",
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"lessThan": "7d8cc301bcba233f31b589a45f4c1c97f2bb90d6",
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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": "9f71cebcac2148e68d0d67f113d0f9aabfcc7a2a",
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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": "6.1.2",
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"lessThan": "6.1.188",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.0.16",
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"lessThan": "6.1",
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"status": "affected",
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"versionType": "semver"
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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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"drivers/net/wireless/intel/iwlwifi/mei/main.c"
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],
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"versions": [
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{
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"version": "6.2",
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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": "6.2",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.110",
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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": "6.18.52",
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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": "7.2.6",
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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": "6.1.2",
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"versionEndExcluding": "6.1.188"
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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": "6.2",
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"versionEndExcluding": "6.6.157"
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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": "6.2",
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"versionEndExcluding": "6.12.110"
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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": "6.2",
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"versionEndExcluding": "6.18.52"
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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": "6.2",
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"versionEndExcluding": "7.2.6"
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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": "6.2",
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"versionEndExcluding": "7.3"
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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": "6.0.16"
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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/a4034f1cc8a422cefc519290d8e6cfb7ff773586"
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},
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{
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"url": "https://git.kernel.org/stable/c/b90ebae632318dc2e5cd4ac96e454ec50f705579"
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},
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{
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"url": "https://git.kernel.org/stable/c/9c6bea89a16815688a5240dd4a74c922a92fcdc3"
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},
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{
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"url": "https://git.kernel.org/stable/c/242125bbf19a2974d22f3d5025c9c14c0a4aea58"
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},
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{
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"url": "https://git.kernel.org/stable/c/f7f770d12e6e928006f89a59291074e5fea82886"
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},
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{
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"url": "https://git.kernel.org/stable/c/7d8cc301bcba233f31b589a45f4c1c97f2bb90d6"
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}
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],
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"title": "wifi: iwlwifi: mei: check SAP message length before reading it",
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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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} |