272 lines
14 KiB
JSON
272 lines
14 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-2023-54306",
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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": "2025-12-30T12:06:44.529Z",
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"datePublished": "2025-12-30T12:23:39.833Z",
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"dateUpdated": "2026-10-15T21:41:44.334Z"
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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": "2026-08-05T09:19:05.796Z"
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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: tls: avoid hanging tasks on the tx_lock\n\nsyzbot sent a hung task report and Eric explains that adversarial\nreceiver may keep RWIN at 0 for a long time, so we are not guaranteed\nto make forward progress. Thread which took tx_lock and went to sleep\nmay not release tx_lock for hours. Use interruptible sleep where\npossible and reschedule the work if it can't take the lock.\n\nTesting: existing selftest passes"
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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 - The condition that causes the tx_lock holder to sleep indefinitely is a zero TCP receive window advertised by the remote TLS peer, so a remote attacker on the network triggers the hang purely through TCP-level behavior against a kTLS-using service (nginx/OpenSSL kTLS, NFS-over-TLS tlshd, etc.). Per kernel scoring guidance, net/tls bugs driven by a remote peer are Network.\nAC:L - The attacker deterministically creates and holds the zero-window condition simply by not reading from the socket; there is no race to win, no memory-layout dependency, and no condition outside the attacker's control. A single sender is sufficient because the partial-send path itself schedules tx_work, which then blocks a kworker on the mutex.\nPR:N - The attacker is just an ordinary TLS peer of the victim service and needs no credentials on the target; for a public HTTPS/TLS endpoint the kTLS session is established with no authentication. No local account or capability on the victim system is required.\nUI:N - The victim service simply serves data over its normal kTLS send path; no administrator or user action beyond routine operation is needed. The hang occurs automatically once the attacker stalls the window.\nS:U - The impact is confined to the kernel/system that owns the vulnerable socket — blocked tasks, pinned kworkers, and a potential panic. No security boundary such as a VM, IOMMU, or sandbox is crossed.\nC:N - The defect is a lock-hold/scheduling problem with no out-of-bounds access, no use-after-free, and no uninitialized data exposure. No kernel memory contents are disclosed to the attacker.\nI:N - Nothing is written out of bounds or modified incorrectly; the record data itself is unaffected and eventually sent or discarded normally. There is no write primitive or control-flow influence available from this bug.\nA:H - The uninterruptible mutex waiters (tx_work_handler kworker, concurrent senders, and close()/exit via cancel_delayed_work_sync) become unkillable D-state tasks, tripping the hung-task watchdog and causing a kernel panic on systems with hung_task_panic=1. Even without panic, each stalled connection permanently pins a global system_wq worker (max_active 256), so repeated attacker connections starve the shared workqueue and wedge unrelated kernel work."
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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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"net/tls/tls_sw.c"
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],
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"versions": [
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{
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"version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
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"lessThan": "bde541a57b4204d0a800afbbd3d1c06c9cdb133f",
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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": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
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"lessThan": "7123a4337bf73132bbfb5437e4dc83ba864a9a1e",
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"status": "affected",
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},
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{
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"version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
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"lessThan": "be5d5d0637fd88c18ee76024bdb22649a1de00d6",
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"status": "affected",
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{
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"lessThan": "1f800f6aae57d2d8f63d32fff383017cbc11cf65",
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"status": "affected",
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},
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{
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"version": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
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"lessThan": "ccf1ccdc5926907befbe880b562b2a4b5f44c087",
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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": "79ffe6087e9145d2377385cac48d0d6a6b4225a5",
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"lessThan": "f3221361dc85d4de22586ce8441ec2c67b454f5d",
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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": "c8d6817345f4ba228d07380e571676405e112872",
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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": "5.3.11",
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"lessThan": "5.4",
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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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"net/tls/tls_sw.c"
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],
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"versions": [
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{
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"version": "5.4",
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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": "5.4",
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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": "5.4.235",
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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": "5.10.173",
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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": "5.15.100",
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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": "6.1.18",
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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": "6.2.5",
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"lessThanOrEqual": "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": "6.3",
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.4",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/bde541a57b4204d0a800afbbd3d1c06c9cdb133f"
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},
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{
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"url": "https://git.kernel.org/stable/c/7123a4337bf73132bbfb5437e4dc83ba864a9a1e"
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},
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{
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"url": "https://git.kernel.org/stable/c/be5d5d0637fd88c18ee76024bdb22649a1de00d6"
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},
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{
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"url": "https://git.kernel.org/stable/c/1f800f6aae57d2d8f63d32fff383017cbc11cf65"
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},
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{
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"url": "https://git.kernel.org/stable/c/ccf1ccdc5926907befbe880b562b2a4b5f44c087"
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},
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{
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"url": "https://git.kernel.org/stable/c/f3221361dc85d4de22586ce8441ec2c67b454f5d"
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}
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],
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"title": "net: tls: avoid hanging tasks on the tx_lock",
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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-2023-54306",
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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": "2026-10-15T21:40:10.978521Z"
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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": "2026-10-15T21:41:44.334Z"
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}
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}
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]
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}
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} |