{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64429",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-64429"
  ],
  "published": "2026-07-25T08:51:45Z",
  "summary": "gpio: eic-sprd: use raw_spinlock_t in the irq startup path",
  "details": "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->lock 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() -> __setup_irq() ->\nirq_startup() -> sprd_eic_irq_unmask() -> sprd_eic_update() carrier and\nused the original spin_lock_irqsave(&sprd_eic->lock) 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.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64429"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/96612bf2712cd961dbd9b52f3a9b4ab668f57628"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/581ac2ad001ff1128931191f249a7f2074672b7a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e244cd8b51001ba480f274c44dba9002813a4739"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/19d63fd528719ce7d06d9aeb88d25b7d6478198a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6112fba4150039ccd90e29f2d1b788c73ad7b3dd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4750909a40da9016185e0ac991510a278cecb1e7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c3c9ec1172a4c3384b8b800b3a8896cc2c1b20e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/90f0109019e6817eb40a486671b7722d1544ae29"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}