{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c296d5f9957c03994a699d6739c27d4581a9f6c7"
            },
            {
              "fixed": "2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7"
            },
            {
              "fixed": "f0c869df2c33793c8828acaab3e4a5e0176f9f00"
            },
            {
              "fixed": "dcb48fde8003492256dee45815144aa5ed26ce7c"
            },
            {
              "fixed": "f576944a59f31bcffff121117ebf452c5dd162b7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98094.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: fbtft: make dirty_lock IRQ-safe\n\nfbtft_mkdirty() can be reached from the fbcon rendering path while\nprocessing printk() in hardirq context. Meanwhile, dirty_lock is also\ntaken by fbtft_deferred_io() in workqueue context with local interrupts\nenabled.\n\nLockdep reports a possible IRQ lock inversion involving dirty_lock and\nconsole_owner. A hardirq can interrupt a CPU holding dirty_lock and\nenter the console rendering path, which can attempt to acquire\ndirty_lock again.\n\nThe following lockdep report was observed on an RK3566 system with\nCONFIG_PROVE_LOCKING enabled:\n\n  WARNING: possible irq lock inversion dependency detected\n  swapper/2/0 just changed the state of lock:\n  (console_owner){-...}-{0:0}\n  but this lock took another, HARDIRQ-unsafe lock in the past:\n  (\u0026par-\u003edirty_lock){+.+.}-{2:2}\n\n  CPU0                    CPU1\n  ----                    ----\n  lock(\u0026par-\u003edirty_lock);\n                         local_irq_disable();\n                         lock(console_owner);\n                         lock(\u0026par-\u003edirty_lock);\n  \u003cInterrupt\u003e\n    lock(console_owner);\n\n  *** DEADLOCK ***\n\nUse spin_lock_irqsave() for fbtft_mkdirty() and spin_lock_irq() for\nfbtft_deferred_io(). They only access the dirty line range, so the\nIRQ-off regions remain short.",
  "id": "CVE-2026-98094",
  "modified": "2026-09-27T03:30:16.431802467Z",
  "published": "2026-09-25T10:24:25.889Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcb48fde8003492256dee45815144aa5ed26ce7c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0c869df2c33793c8828acaab3e4a5e0176f9f00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f576944a59f31bcffff121117ebf452c5dd162b7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98094.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98094"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "staging: fbtft: make dirty_lock IRQ-safe"
}