298 lines
17 KiB
JSON
298 lines
17 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-2026-74488",
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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": "2026-08-15T05:44:03.905Z",
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"datePublished": "2026-08-15T12:27:18.867Z",
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"dateUpdated": "2026-10-16T19:05:49.470Z"
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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": "2026-08-19T16:37:43.361Z"
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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: mwifiex: use the subframe length when parsing A-MSDU TDLS frames\n\nmwifiex_11n_dispatch_amsdu_pkt() splits an A-MSDU with\nieee80211_amsdu_to_8023s() and walks the resulting subframes. For each\nsubframe it passes the subframe data pointer to\nmwifiex_process_tdls_action_frame(), but pairs it with skb->len, the\nlength of the A-MSDU parent, instead of rx_skb->len:\n\n\trx_skb = __skb_dequeue(&list);\n\trx_hdr = (struct rx_packet_hdr *)rx_skb->data;\n\tif (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&\n\t ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {\n\t\tmwifiex_process_tdls_action_frame(priv, (u8 *)rx_hdr,\n\t\t\t\t\t\t skb->len);\n\t}\n\nThe parent is not a valid description of that buffer, and may not be\nvalid memory at all. ieee80211_amsdu_to_8023s() ends with\n\n\tif (!reuse_skb)\n\t\tdev_kfree_skb(skb);\n\nand it only sets reuse_skb when the parent is linear, is not a\nhead_frag, and is being consumed as the *last* subframe. So when the\nparent does not qualify for reuse it has already been freed, and the\nread of skb->len is a use-after-free. When it is reused, skb->len is\nthe length of the last subframe, applied to every earlier subframe,\nwhich over-states the buffer whenever an earlier subframe is shorter.\n\nThe callee cannot absorb a wrong length, because it derives its own\nceiling from the value it is given. Each frame type computes\n\n\ties_len = len - sizeof(struct ethhdr) - TDLS_*_FIX_LEN;\n\nand the element walk is then bounded entirely against that ceiling,\n\n\tfor (end = pos + ies_len; pos + 1 < end; pos += 2 + pos[1]) {\n\t\tu8 ie_len = pos[1];\n\n\t\tif (pos + 2 + ie_len > end)\n\t\t\tbreak;\n\nso a too-large len moves end past the end of the subframe and the walk\nreads and copies beyond it. The A-MSDU layout is chosen by the sender,\nwhich makes the difference between the last subframe and a shorter\nearlier one remotely selectable. Reaching this requires TDLS support in\nfirmware and the TDLS ethertype on the subframe.\n\nThe other caller, mwifiex_process_rx_packet(), is correct: it passes a\npointer and a length that describe the same region of the RX buffer.\n\nPass rx_skb->len, the length of the subframe actually being parsed."
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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:H/I:H/A:H",
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"baseScore": 8.8,
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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 bug is reached when the mwifiex driver processes attacker-supplied A-MSDU TDLS frames received over WiFi from a nearby peer, AP, or injector on the same wireless segment, which is an adjacent RF attack vector rather than remote Internet or local syscall access.\nAC:L - Once TDLS-capable mwifiex firmware receives an A-MSDU, the attacker fully controls subframe sizes and TDLS content to trigger either the skb use-after-free or the overstated-length out-of-bounds parse reliably without depending on uncontrollable timing or memory layout.\nPR:N - Exploitation requires only the ability to deliver crafted 802.11 data frames to the victim radio; it does not require any local account, capability, or root access on the Linux host and is not gated by user-namespace privilege boundaries.\nUI:N - No victim user action beyond normal wireless operation is required; the driver parses malicious TDLS subframes automatically during receive and A-MSDU decomposition before forwarding traffic to the network stack.\nS:U - Impact is confined to kernel memory corruption and driver state within the host kernel security authority; it does not by itself cross a VM, container, or IOMMU boundary to affect a separate security domain.\nC:H - The skb use-after-free reads freed sk_buff metadata and the inflated length drives an out-of-bounds IE walk that reads kernel memory beyond the subframe, including attacker-positioned bytes from subsequent A-MSDU subframes, enabling substantial information disclosure.\nI:H - The same out-of-bounds parse copies attacker-controlled IE data from beyond the subframe into heap-allocated sta_node/tdls_cap structures via memcpy, providing a memory-corruption primitive that can be developed into arbitrary kernel write or code execution.\nA:H - Reading skb->len after the parent A-MSDU skb may already be freed can immediately fault or corrupt memory, and the out-of-bounds TDLS element parsing can provoke kernel oopses or panics even when full exploitation is not attempted."
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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/marvell/mwifiex/11n_rxreorder.c"
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],
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"versions": [
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{
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"version": "776f742040ca5eb6242c60f29ac73d5752a5b621",
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"lessThan": "707664027bb9307f7268eda403af7c4ccd9b8644",
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"status": "affected",
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"versionType": "git"
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"lessThan": "3b02275833a0d3e6583627995d614fa99bdf364f",
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"status": "affected",
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},
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"lessThan": "a1f0f7dc7eb15754e6931b433edb7beb754c996a",
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"status": "affected",
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"lessThan": "25e5a3fe4f15e30f74eca42cbf3bcc3a3fbeda79",
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"status": "affected",
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},
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{
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"version": "776f742040ca5eb6242c60f29ac73d5752a5b621",
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"lessThan": "ece2ebb34247d573142617dfc534a9dc11ba59be",
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"status": "affected",
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{
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"version": "776f742040ca5eb6242c60f29ac73d5752a5b621",
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"lessThan": "c9dcfe6b8b71369e1d732e2ff622c3696a2f032c",
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"status": "affected",
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},
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{
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"version": "776f742040ca5eb6242c60f29ac73d5752a5b621",
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"lessThan": "5a21ab03829cb6d2682c127f22e2b9cd63b4393f",
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"status": "affected",
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{
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"version": "776f742040ca5eb6242c60f29ac73d5752a5b621",
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"lessThan": "99a948382af8a225e2d5e54a7052158cd6281cc6",
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"status": "affected",
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"versionType": "git"
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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/marvell/mwifiex/11n_rxreorder.c"
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],
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"versions": [
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{
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"version": "4.5",
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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": "4.5",
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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": "5.10.265",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
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{
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"version": "6.6.151",
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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": "6.12.103",
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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": "6.18.44",
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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": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"negate": false,
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"references": [
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"url": "https://git.kernel.org/stable/c/707664027bb9307f7268eda403af7c4ccd9b8644"
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},
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"url": "https://git.kernel.org/stable/c/3b02275833a0d3e6583627995d614fa99bdf364f"
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},
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{
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"url": "https://git.kernel.org/stable/c/a1f0f7dc7eb15754e6931b433edb7beb754c996a"
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},
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{
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"url": "https://git.kernel.org/stable/c/25e5a3fe4f15e30f74eca42cbf3bcc3a3fbeda79"
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},
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{
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"url": "https://git.kernel.org/stable/c/ece2ebb34247d573142617dfc534a9dc11ba59be"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9dcfe6b8b71369e1d732e2ff622c3696a2f032c"
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},
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{
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"url": "https://git.kernel.org/stable/c/5a21ab03829cb6d2682c127f22e2b9cd63b4393f"
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},
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{
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"url": "https://git.kernel.org/stable/c/99a948382af8a225e2d5e54a7052158cd6281cc6"
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}
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],
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"title": "wifi: mwifiex: use the subframe length when parsing A-MSDU TDLS frames",
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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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"adp": [
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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-2026-74488",
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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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},
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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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"version": "2.0.3",
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"timestamp": "2026-10-16T18:57:58.234804Z"
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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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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T19:05:49.470Z"
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}
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}
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]
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}
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} |