256 lines
13 KiB
JSON
256 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-2026-74678",
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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": "2026-08-15T05:44:03.925Z",
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"datePublished": "2026-08-22T15:32:46.765Z",
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"dateUpdated": "2026-10-16T19:16:08.884Z"
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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": "2026-08-25T05:41:29.048Z"
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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\nnet: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()\n\nWhen the interface has NETIF_F_SG enabled and skb_linearize() fails in\nax88179_tx_fixup(), the function returns NULL without freeing the skb.\n\nusbnet_start_xmit() treats a NULL return from tx_fixup() as a drop\n(info->flags does not set FLAG_MULTI_PACKET for this driver), jumping\nto the \"drop\" label where it does `if (skb) dev_kfree_skb_any(skb)`.\nBecause tx_fixup() returned NULL, the local skb variable in\nusbnet_start_xmit() is NULL, so the original skb is never freed — a\nmemory leak on every TX frame whose linearization fails (i.e. under\nmemory pressure).\n\nFree the skb before returning, matching the error handling already used\nfor the pskb_expand_head() failure path in the same function."
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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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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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:N - On systems using the common ASIX AX88179/AX88178A USB 3.0 GbE adapter as their uplink, remote peers induce outbound TSO/GSO traffic that reaches ax88179_tx_fixup() via __dev_queue_xmit→netdev_start_xmit→usbnet_start_xmit; attacker-supplied or reply traffic over the bound NIC is standard network reachability.\nAC:L - NETIF_F_SG and NETIF_F_TSO are always enabled at bind; an attacker can send non-linear egress skbs and deliberately exhaust GFP_ATOMIC/slab memory so skb_linearize() fails on demand—both prerequisites are fully under attacker control without races or rare layout.\nPR:N - No capability or authentication gates the netdev TX path; any remote host exchanging IP traffic with a victim whose ax88179 interface is up can trigger usbnet_start_xmit without local shell access, credentials, or init-namespace privileges.\nUI:N - Exploitation needs only that the adapter is plugged in and carrying traffic—the normal always-on state for USB-Ethernet docks, kiosks, and laptops—not any one-time victim action such as mounting media or opening a file.\nS:U - Leaked sk_buff objects remain in kernel SLAB caches within the same kernel security authority; there is no VM escape, container breakout, IOMMU bypass, or cross-boundary corruption.\nC:N - Orphaned skbs are not freed but are not exposed to userspace or adjacent objects; there is no out-of-bounds read, use-after-free, or other disclosure primitive—only silent kernel heap consumption.\nI:N - The defect drops an skb reference on an error return without corrupting heap metadata, overwriting kernel objects, or enabling arbitrary writes or control-flow hijacking.\nA:H - Each skb_linearize() failure permanently leaks one skb; under attacker-driven memory pressure an unauthenticated remote peer can repeat TSO egress to exhaust kernel memory, provoking OOM-killer thrashing and denial of service on the host."
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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/usb/ax88179_178a.c"
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],
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"versions": [
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{
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"version": "16b1c4e01c89ba07367461e0bc4cb84993c2d027",
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"lessThan": "83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b",
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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": "16b1c4e01c89ba07367461e0bc4cb84993c2d027",
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"lessThan": "1c63303659a2264bd55d9813df74cb4caeed5922",
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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": "16b1c4e01c89ba07367461e0bc4cb84993c2d027",
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"lessThan": "2be5091fa693b9119ad25a8bb8c149d236a23ade",
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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": "16b1c4e01c89ba07367461e0bc4cb84993c2d027",
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"lessThan": "58733b1dd46bb231d9d279c132a20ee46da1b664",
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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": "16b1c4e01c89ba07367461e0bc4cb84993c2d027",
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"lessThan": "4039cd807a5a46dc5f7618fffae926b8ad8455eb",
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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": "16b1c4e01c89ba07367461e0bc4cb84993c2d027",
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"lessThan": "1f428e30947395d9b9aacee03e25a4e6cfcad7a4",
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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/usb/ax88179_178a.c"
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],
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"versions": [
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{
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"version": "5.17",
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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": "5.17",
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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": "6.1.183",
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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": "6.6.152",
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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": "6.12.104",
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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": "6.18.45",
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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": "7.1.9",
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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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{
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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": "5.17",
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"versionEndExcluding": "6.1.183"
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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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"versionEndExcluding": "6.6.152"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b"
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},
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{
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"url": "https://git.kernel.org/stable/c/1c63303659a2264bd55d9813df74cb4caeed5922"
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},
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{
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"url": "https://git.kernel.org/stable/c/2be5091fa693b9119ad25a8bb8c149d236a23ade"
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},
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{
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"url": "https://git.kernel.org/stable/c/58733b1dd46bb231d9d279c132a20ee46da1b664"
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},
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{
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"url": "https://git.kernel.org/stable/c/4039cd807a5a46dc5f7618fffae926b8ad8455eb"
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},
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{
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"url": "https://git.kernel.org/stable/c/1f428e30947395d9b9aacee03e25a4e6cfcad7a4"
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}
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],
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"title": "net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()",
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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-2026-74678",
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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": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T19:14:27.464572Z"
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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": "2026-10-16T19:16:08.884Z"
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}
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}
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]
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}
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} |