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CVE-2025-71132 (GCVE-0-2025-71132)

Vulnerability from cvelistv5 – Published: 2026-01-14 15:07 – Updated: 2026-08-05 12:12
VLAI
Title
smc91x: fix broken irq-context in PREEMPT_RT
Summary
In the Linux kernel, the following vulnerability has been resolved: smc91x: fix broken irq-context in PREEMPT_RT When smc91x.c is built with PREEMPT_RT, the following splat occurs in FVP_RevC: [ 13.055000] smc91x LNRO0003:00 eth0: link up, 10Mbps, half-duplex, lpa 0x0000 [ 13.062137] BUG: workqueue leaked atomic, lock or RCU: kworker/2:1[106] [ 13.062137] preempt=0x00000000 lock=0->0 RCU=0->1 workfn=mld_ifc_work [ 13.062266] C ** replaying previous printk message ** [ 13.062266] CPU: 2 UID: 0 PID: 106 Comm: kworker/2:1 Not tainted 6.18.0-dirty #179 PREEMPT_{RT,(full)} [ 13.062353] Hardware name: , BIOS [ 13.062382] Workqueue: mld mld_ifc_work [ 13.062469] Call trace: [ 13.062494] show_stack+0x24/0x40 (C) [ 13.062602] __dump_stack+0x28/0x48 [ 13.062710] dump_stack_lvl+0x7c/0xb0 [ 13.062818] dump_stack+0x18/0x34 [ 13.062926] process_scheduled_works+0x294/0x450 [ 13.063043] worker_thread+0x260/0x3d8 [ 13.063124] kthread+0x1c4/0x228 [ 13.063235] ret_from_fork+0x10/0x20 This happens because smc_special_trylock() disables IRQs even on PREEMPT_RT, but smc_special_unlock() does not restore IRQs on PREEMPT_RT. The reason is that smc_special_unlock() calls spin_unlock_irqrestore(), and rcu_read_unlock_bh() in __dev_queue_xmit() cannot invoke rcu_read_unlock() through __local_bh_enable_ip() when current->softirq_disable_cnt becomes zero. To address this issue, replace smc_special_trylock() with spin_trylock_irqsave().
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:42 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 342a93247e0837101f27bbcca26f402902df98dc , < 1c4cb705e733250d13243f6a69b8b5a92e39b9f6 (git)
Affected: 342a93247e0837101f27bbcca26f402902df98dc , < 9d222141b00156509d67d80c771fbefa92c43ace (git)
Affected: 342a93247e0837101f27bbcca26f402902df98dc , < ef277ae121b3249c99994652210a326b52d527b0 (git)
Affected: 342a93247e0837101f27bbcca26f402902df98dc , < 36561b86cb2501647662cfaf91286dd6973804a6 (git)
Affected: 342a93247e0837101f27bbcca26f402902df98dc , < b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3 (git)
Affected: 342a93247e0837101f27bbcca26f402902df98dc , < 6402078bd9d1ed46e79465e1faaa42e3458f8a33 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.4 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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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-\u003e0 RCU=0-\u003e1 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-\u003esoftirq_disable_cnt becomes zero.\n\nTo address this issue, replace smc_special_trylock() with spin_trylock_irqsave()."
        }
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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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    "cveId": "CVE-2025-71132",
    "datePublished": "2026-01-14T15:07:47.860Z",
    "dateReserved": "2026-01-13T15:30:19.655Z",
    "dateUpdated": "2026-08-05T12:12:17.694Z",
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    "epss": {
      "cve": "CVE-2025-71132",
      "date": "2026-09-16",
      "epss": "0.00273",
      "percentile": "0.19782"
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      "cve": "CVE-2025-71132",
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      "title": "smc91x: fix broken irq-context in PREEMPT_RT",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71132\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-14T15:16:02.947\",\"lastModified\":\"2026-07-30T06:24:53.863\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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-\u003e0 RCU=0-\u003e1 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-\u003esoftirq_disable_cnt becomes zero.\\n\\nTo address this issue, replace smc_special_trylock() with spin_trylock_irqsave().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nsmc91x: corregir el contexto de IRQ roto en PREEMPT_RT\\n\\nCuando smc91x.c se compila con PREEMPT_RT, ocurre el siguiente \u0027splat\u0027 en 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-\u0026gt;0 RCU=0-\u0026gt;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\\nEsto ocurre porque smc_special_trylock() deshabilita las IRQ incluso en PREEMPT_RT, pero smc_special_unlock() no restaura las IRQ en PREEMPT_RT.\\nLa raz\u00f3n es que smc_special_unlock() llama a spin_unlock_irqrestore(), y rcu_read_unlock_bh() en __dev_queue_xmit() no puede invocar a rcu_read_unlock() a trav\u00e9s de __local_bh_enable_ip() cuando current-\u0026gt;softirq_disable_cnt se vuelve cero.\\n\\nPara abordar este problema, reemplace smc_special_trylock() con spin_trylock_irqsave().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/smsc/smc91x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"342a93247e0837101f27bbcca26f402902df98dc\",\"lessThan\":\"1c4cb705e733250d13243f6a69b8b5a92e39b9f6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342a93247e0837101f27bbcca26f402902df98dc\",\"lessThan\":\"9d222141b00156509d67d80c771fbefa92c43ace\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342a93247e0837101f27bbcca26f402902df98dc\",\"lessThan\":\"ef277ae121b3249c99994652210a326b52d527b0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342a93247e0837101f27bbcca26f402902df98dc\",\"lessThan\":\"36561b86cb2501647662cfaf91286dd6973804a6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342a93247e0837101f27bbcca26f402902df98dc\",\"lessThan\":\"b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342a93247e0837101f27bbcca26f402902df98dc\",\"lessThan\":\"6402078bd9d1ed46e79465e1faaa42e3458f8a33\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/smsc/smc91x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.198\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.160\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.120\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.64\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.4\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-10T20:42:13.928914Z\",\"id\":\"CVE-2025-71132\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.1\",\"versionEndExcluding\":\"5.15.198\",\"matchCriteriaId\":\"5BEC28A5-0DC2-4D3D-A401-40D4AEA6C42A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.160\",\"matchCriteriaId\":\"C10CC03E-16A9-428A-B449-40D3763E15F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.120\",\"matchCriteriaId\":\"43C3A206-5EEE-417B-AA0F-EF8972E7A9F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.64\",\"matchCriteriaId\":\"32BF4A52-377C-44ED-B5E6-7EA5D896E98B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.4\",\"matchCriteriaId\":\"DC988EA0-0E32-457A-BF95-89BEB31A227B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"40D9C0D1-0F32-4A2B-9840-1072F5497540\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB5B7DFC-C36B-45D8-922C-877569FDDF43\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1c4cb705e733250d13243f6a69b8b5a92e39b9f6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/36561b86cb2501647662cfaf91286dd6973804a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6402078bd9d1ed46e79465e1faaa42e3458f8a33\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9d222141b00156509d67d80c771fbefa92c43ace\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef277ae121b3249c99994652210a326b52d527b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-03T04:55:19+00:00",
      "cve": "CVE-2025-71132",
      "id": "CVE-2025-71132",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: smc91x: fix broken irq-context in PREEMPT_RT",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71132.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:47:40Z",
      "cve": "CVE-2025-71132",
      "id": "CVE-2025-71132",
      "initial_release_date": "2026-01-19T00:23:44Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "446",
      "product_status:known_not_affected": "312",
      "product_status:recommended": "309",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-71132",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-71132.json",
      "version": "31"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-71132\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-10T20:42:13.928914Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-11T17:39:11.472Z\"}}], \"cna\": {\"title\": \"smc91x: fix broken irq-context in PREEMPT_RT\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\"}}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"342a93247e0837101f27bbcca26f402902df98dc\", \"lessThan\": \"1c4cb705e733250d13243f6a69b8b5a92e39b9f6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"342a93247e0837101f27bbcca26f402902df98dc\", \"lessThan\": \"9d222141b00156509d67d80c771fbefa92c43ace\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"342a93247e0837101f27bbcca26f402902df98dc\", \"lessThan\": \"ef277ae121b3249c99994652210a326b52d527b0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"342a93247e0837101f27bbcca26f402902df98dc\", \"lessThan\": \"36561b86cb2501647662cfaf91286dd6973804a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"342a93247e0837101f27bbcca26f402902df98dc\", \"lessThan\": \"b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"342a93247e0837101f27bbcca26f402902df98dc\", \"lessThan\": \"6402078bd9d1ed46e79465e1faaa42e3458f8a33\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/smsc/smc91x.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.160\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/smsc/smc91x.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1c4cb705e733250d13243f6a69b8b5a92e39b9f6\"}, {\"url\": \"https://git.kernel.org/stable/c/9d222141b00156509d67d80c771fbefa92c43ace\"}, {\"url\": \"https://git.kernel.org/stable/c/ef277ae121b3249c99994652210a326b52d527b0\"}, {\"url\": \"https://git.kernel.org/stable/c/36561b86cb2501647662cfaf91286dd6973804a6\"}, {\"url\": \"https://git.kernel.org/stable/c/b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3\"}, {\"url\": \"https://git.kernel.org/stable/c/6402078bd9d1ed46e79465e1faaa42e3458f8a33\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"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-\u003e0 RCU=0-\u003e1 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-\u003esoftirq_disable_cnt becomes zero.\\n\\nTo address this issue, replace smc_special_trylock() with spin_trylock_irqsave().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.160\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.64\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.4\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"5.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-07-30T06:05:27.381Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-71132\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-30T06:05:27.381Z\", \"dateReserved\": \"2026-01-13T15:30:19.655Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-01-14T15:07:47.860Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.