FKIE_CVE-2025-71132

Vulnerability from fkie_nvd - Published: 2026-01-14 15:16 - Updated: 2026-03-25 19:56
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c4cb705e733250d13243f6a69b8b5a92e39b9f6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36561b86cb2501647662cfaf91286dd6973804a6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6402078bd9d1ed46e79465e1faaa42e3458f8a33Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d222141b00156509d67d80c771fbefa92c43acePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b6018d5c1a8f09d5efe4d6961d7ee45fdf3a7ce3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef277ae121b3249c99994652210a326b52d527b0Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.15
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5BEC28A5-0DC2-4D3D-A401-40D4AEA6C42A",
              "versionEndExcluding": "5.15.198",
              "versionStartIncluding": "5.15.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C10CC03E-16A9-428A-B449-40D3763E15F6",
              "versionEndExcluding": "6.1.160",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "43C3A206-5EEE-417B-AA0F-EF8972E7A9F0",
              "versionEndExcluding": "6.6.120",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "32BF4A52-377C-44ED-B5E6-7EA5D896E98B",
              "versionEndExcluding": "6.12.64",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DC988EA0-0E32-457A-BF95-89BEB31A227B",
              "versionEndExcluding": "6.18.4",
              "versionStartIncluding": "6.13",
              "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",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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()."
    }
  ],
  "id": "CVE-2025-71132",
  "lastModified": "2026-03-25T19:56:03.873",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-01-14T15:16:02.947",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.