268 lines
14 KiB
JSON
268 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-2025-71132",
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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": "2026-01-13T15:30:19.655Z",
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"datePublished": "2026-01-14T15:07:47.860Z",
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"dateUpdated": "2026-10-19T18:15:15.774Z"
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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": "2026-08-05T12:12:17.694Z"
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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\nsmc91x: fix broken irq-context in PREEMPT_RT\n\nWhen smc91x.c is built with PREEMPT_RT, the following splat occurs\nin FVP_RevC:\n\n[ 13.055000] smc91x LNRO0003:00 eth0: link up, 10Mbps, half-duplex, lpa 0x0000\n[ 13.062137] BUG: workqueue leaked atomic, lock or RCU: kworker/2:1[106]\n[ 13.062137] preempt=0x00000000 lock=0->0 RCU=0->1 workfn=mld_ifc_work\n[ 13.062266] C\n** replaying previous printk message **\n[ 13.062266] CPU: 2 UID: 0 PID: 106 Comm: kworker/2:1 Not tainted 6.18.0-dirty #179 PREEMPT_{RT,(full)}\n[ 13.062353] Hardware name: , BIOS\n[ 13.062382] Workqueue: mld mld_ifc_work\n[ 13.062469] Call trace:\n[ 13.062494] show_stack+0x24/0x40 (C)\n[ 13.062602] __dump_stack+0x28/0x48\n[ 13.062710] dump_stack_lvl+0x7c/0xb0\n[ 13.062818] dump_stack+0x18/0x34\n[ 13.062926] process_scheduled_works+0x294/0x450\n[ 13.063043] worker_thread+0x260/0x3d8\n[ 13.063124] kthread+0x1c4/0x228\n[ 13.063235] ret_from_fork+0x10/0x20\n\nThis happens because smc_special_trylock() disables IRQs even on PREEMPT_RT,\nbut smc_special_unlock() does not restore IRQs on PREEMPT_RT.\nThe reason is that smc_special_unlock() calls spin_unlock_irqrestore(),\nand rcu_read_unlock_bh() in __dev_queue_xmit() cannot invoke\nrcu_read_unlock() through __local_bh_enable_ip() when current->softirq_disable_cnt becomes zero.\n\nTo address this issue, replace smc_special_trylock() with spin_trylock_irqsave()."
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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 - Internet-routable ICMP/TCP traffic can force transmission through smc91x, while a pre-authentication network service makes the persistent process-context RCU leak remotely repeatable. An adjacent MLD query also directly schedules report work that reaches the vulnerable path.\nAC:L - On an affected SMP PREEMPT_RT system, every successful transmit-side trylock produces the IRQ-state mismatch without a race or uncontrolled timing requirement. Required packet fields and repeated transmissions are attacker-controlled.\nPR:N - Unauthenticated network traffic reaches the transmit path without target credentials or capabilities. The MLD path likewise has protocol-validity checks but no authentication or privilege check.\nUI:N - Kernel protocol handling and network-service responses occur automatically without victim action.\nS:U - The IRQ and RCU corruption affects the same host kernel security authority and does not cross a VM, IOMMU, or other security boundary.\nC:N - The bug leaks RCU read-side state and disables interrupts but provides no memory disclosure or read primitive.\nI:N - No memory is corrupted and no attacker-controlled write or data-modification primitive is created.\nA:H - Leaked RCU nesting can indefinitely block grace periods and accumulate callbacks, while broken IRQ state can stall critical processing. Repeated triggering can therefore cause RCU stalls or a system-wide hang."
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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/ethernet/smsc/smc91x.c"
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],
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"versions": [
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{
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"version": "342a93247e0837101f27bbcca26f402902df98dc",
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"lessThan": "1c4cb705e733250d13243f6a69b8b5a92e39b9f6",
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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": "342a93247e0837101f27bbcca26f402902df98dc",
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"lessThan": "9d222141b00156509d67d80c771fbefa92c43ace",
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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": "342a93247e0837101f27bbcca26f402902df98dc",
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"lessThan": "ef277ae121b3249c99994652210a326b52d527b0",
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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": "342a93247e0837101f27bbcca26f402902df98dc",
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"lessThan": "36561b86cb2501647662cfaf91286dd6973804a6",
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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": "342a93247e0837101f27bbcca26f402902df98dc",
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"lessThan": "b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3",
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"status": "affected",
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},
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{
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"version": "342a93247e0837101f27bbcca26f402902df98dc",
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"lessThan": "6402078bd9d1ed46e79465e1faaa42e3458f8a33",
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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/ethernet/smsc/smc91x.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "5.15",
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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": "5.15.198",
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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": "6.1.160",
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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": "6.6.120",
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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": "6.12.64",
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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": "6.18.4",
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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": "6.19",
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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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "5.15.198"
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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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]
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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/1c4cb705e733250d13243f6a69b8b5a92e39b9f6"
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},
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{
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"url": "https://git.kernel.org/stable/c/9d222141b00156509d67d80c771fbefa92c43ace"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef277ae121b3249c99994652210a326b52d527b0"
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},
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{
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"url": "https://git.kernel.org/stable/c/36561b86cb2501647662cfaf91286dd6973804a6"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3"
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},
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{
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"url": "https://git.kernel.org/stable/c/6402078bd9d1ed46e79465e1faaa42e3458f8a33"
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}
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],
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"title": "smc91x: fix broken irq-context in PREEMPT_RT",
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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-2025-71132",
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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": "2026-06-10T20:42:13.928914Z"
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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-667",
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"description": "CWE-667 Improper Locking"
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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": "2026-10-19T18:15:15.774Z"
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}
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}
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]
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}
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} |