305 lines
16 KiB
JSON
305 lines
16 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-2022-50355",
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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": "2025-09-17T14:53:06.993Z",
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"datePublished": "2025-09-17T14:56:08.356Z",
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"dateUpdated": "2026-08-05T08:58:21.802Z"
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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": "2026-08-05T08:58:21.802Z"
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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: vt6655: fix some erroneous memory clean-up loops\n\nIn some initialization functions of this driver, memory is allocated with\n'i' acting as an index variable and increasing from 0. The commit in\n\"Fixes\" introduces some clean-up codes in case of allocation failure,\nwhich free memory in reverse order with 'i' decreasing to 0. However,\nthere are some problems:\n - The case i=0 is left out. Thus memory is leaked.\n - In case memory allocation fails right from the start, the memory\n freeing loops will start with i=-1 and invalid memory locations will\n be accessed.\n\nOne of these loops has been fixed in commit c8ff91535880 (\"staging:\nvt6655: fix potential memory leak\"). Fix the remaining erroneous loops."
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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:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The flaw is reached only when bringing up the vt6655 mac80211 interface (SIOCSIFFLAGS/ip link set up → ieee80211_open → drv_start → vnt_start → device_init_rd0/rd1/td1_ring), which is local driver initialization—not packet parsing or adjacent-link frame injection.\nAC:L - A local attacker can induce memory pressure (memcg/mmap) so the first kzalloc or device_alloc_rx_buf in ring init fails after device_init_rings succeeds, then deterministically hit the broken while (--i) path; no race or attacker-uncontrollable layout is required.\nPR:L - Triggering vnt_start requires CAP_NET_ADMIN to set IFF_UP, but in realistic deployments (NetworkManager/polkit seat policies, delegated net admin) an unprivileged local user can enable the wireless interface; per guidance when uncertain this is scored Low rather than High.\nUI:N - The attacker brings the interface up and forces the allocation-failure cleanup themselves; no separate victim mount, click, or other interactive action is required.\nS:U - Impact is host-kernel heap corruption inside the staging PCI WiFi driver under the same OS authority, with no VM escape, IOMMU bypass, or other security-boundary crossing.\nC:H - On i==0 failure, while (--i) indexes aRD1Ring[-1]/apTD1Rings[-1] into the previously initialized adjacent DMA ring and frees live rd_info/td_info (double-free), and continues further OOB—classic heap corruption enabling arbitrary kernel read primitives.\nI:H - The same OOB/double-free of descriptor side objects (kfree, dma_unmap, kfree_skb on adjacent or garbage pointers) is exploitable for heap corruption and control-flow hijacking beyond a pure crash.\nA:H - The buggy loop from i==0 decrements indefinitely through invalid indices and frees garbage/adjacent objects, causing kernel oops/panic even without full exploitation; any such crash is Availability 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/staging/vt6655/device_main.c"
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],
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"versions": [
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{
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"version": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
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"lessThan": "637672a71f5016a40b0a6c0f3c8ad25eacedc8c3",
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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": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
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"lessThan": "88b9cc60f26e8a05d1ddbddf91b09ca2915f20e0",
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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": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
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"lessThan": "95ac62e8545be2b0a8cae0beef7c682e2e470e48",
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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": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
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"lessThan": "f19e5b7df54590c831f350381963f25585c8f7d5",
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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": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
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"lessThan": "a9e9806d1c315bc50dce05479a079b9a104474b8",
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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": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
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"lessThan": "ed11b73c963292e7b49c0f37025c58ed3b7921d6",
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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": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
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"lessThan": "2a2db520e3ca5aafba7c211abfd397666c9b5f9d",
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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/staging/vt6655/device_main.c"
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],
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"versions": [
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{
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"version": "4.18",
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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": "4.18",
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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": "4.19.262",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.220",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.150",
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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": "5.15.75",
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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": "5.19.17",
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"lessThanOrEqual": "5.19.*",
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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": "6.0.3",
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"lessThanOrEqual": "6.0.*",
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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",
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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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"operator": "OR",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.18",
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"versionEndExcluding": "4.19.262"
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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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"references": [
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"url": "https://git.kernel.org/stable/c/637672a71f5016a40b0a6c0f3c8ad25eacedc8c3"
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},
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{
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"url": "https://git.kernel.org/stable/c/88b9cc60f26e8a05d1ddbddf91b09ca2915f20e0"
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"url": "https://git.kernel.org/stable/c/a9e9806d1c315bc50dce05479a079b9a104474b8"
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"url": "https://git.kernel.org/stable/c/ed11b73c963292e7b49c0f37025c58ed3b7921d6"
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"url": "https://git.kernel.org/stable/c/2a2db520e3ca5aafba7c211abfd397666c9b5f9d"
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}
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],
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"title": "staging: vt6655: fix some erroneous memory clean-up loops",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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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-2022-50355",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-01-14T18:31:51.758929Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-401",
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"description": "CWE-401 Missing Release of Memory after Effective Lifetime"
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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": "2026-01-14T18:33:00.943Z"
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}
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}
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]
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}
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} |