CVE-2026-64429 (GCVE-0-2026-64429)
Vulnerability from cvelistv5
Published
2026-07-25 08:51
Modified
2026-08-17 04:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: gpio: eic-sprd: use raw_spinlock_t in the irq startup path sprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller state through sprd_eic_update(), which takes sprd_eic->lock with spin_lock_irqsave(). The callback can be reached from irq_startup() while setting up a requested IRQ. That path is not sleepable, but on PREEMPT_RT a regular spinlock_t becomes a sleeping lock. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the request_threaded_irq() -> __setup_irq() -> irq_startup() -> sprd_eic_irq_unmask() -> sprd_eic_update() carrier and used the original spin_lock_irqsave(&sprd_eic->lock) edge. Lockdep BUG: sleeping function called from invalid context hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv] sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv] sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv] sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv] __setup_irq.constprop.0+0xd/0x30 [vuln_msv] Convert the Spreadtrum EIC controller lock to raw_spinlock_t. The locked section only serializes MMIO register updates and does not contain sleepable operations, so keeping it non-sleeping is appropriate for the irqchip callbacks.
References
Impacted products
Vendor Product Version
Linux Linux Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
Version: 25518e024e3a6e5715d672f1daa91e1d100f7436
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpio/gpio-eic-sprd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "version": "6.6.145",
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
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          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: eic-sprd: use raw_spinlock_t in the irq startup path\n\nsprd_eic_irq_unmask() enables the GPIO IRQ and then updates controller\nstate through sprd_eic_update(), which takes sprd_eic-\u003elock with\nspin_lock_irqsave().  The callback can be reached from irq_startup()\nwhile setting up a requested IRQ.  That path is not sleepable, but on\nPREEMPT_RT a regular spinlock_t becomes a sleeping lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the request_threaded_irq() -\u003e __setup_irq() -\u003e\nirq_startup() -\u003e sprd_eic_irq_unmask() -\u003e sprd_eic_update() carrier and\nused the original spin_lock_irqsave(\u0026sprd_eic-\u003elock) edge.  Lockdep\n\n  BUG: sleeping function called from invalid context\n  hardirqs last disabled at ... __setup_irq.constprop.0 ... [vuln_msv]\n  sprd_rt_spin_lock_irqsave+0x1c/0x30 [vuln_msv]\n  sprd_eic_update.constprop.0+0x48/0x90 [vuln_msv]\n  sprd_eic_irq_unmask.constprop.0+0x35/0x50 [vuln_msv]\n  __setup_irq.constprop.0+0xd/0x30 [vuln_msv]\n\nConvert the Spreadtrum EIC controller lock to raw_spinlock_t.  The\nlocked section only serializes MMIO register updates and does not contain\nsleepable operations, so keeping it non-sleeping is appropriate for the\nirqchip callbacks."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:55:29.849Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/96612bf2712cd961dbd9b52f3a9b4ab668f57628"
        },
        {
          "url": "https://git.kernel.org/stable/c/581ac2ad001ff1128931191f249a7f2074672b7a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e244cd8b51001ba480f274c44dba9002813a4739"
        },
        {
          "url": "https://git.kernel.org/stable/c/19d63fd528719ce7d06d9aeb88d25b7d6478198a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6112fba4150039ccd90e29f2d1b788c73ad7b3dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/4750909a40da9016185e0ac991510a278cecb1e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e"
        },
        {
          "url": "https://git.kernel.org/stable/c/90f0109019e6817eb40a486671b7722d1544ae29"
        }
      ],
      "title": "gpio: eic-sprd: use raw_spinlock_t in the irq startup path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64429",
    "datePublished": "2026-07-25T08:51:06.016Z",
    "dateReserved": "2026-07-19T15:36:31.787Z",
    "dateUpdated": "2026-08-17T04:55:29.849Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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