{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.85-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.19.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  spi: spidev: fix lock inversion between spi_lock and buf_lock  The spidev driver previously used two mutexes, spi_lock and buf_lock, but acquired them in different orders depending on the code path:    write()/read(): buf_lock -\u003e spi_lock   ioctl():       spi_lock -\u003e buf_lock  This AB-BA locking pattern triggers lockdep warnings and can cause real deadlocks:    WARNING: possible circular locking dependency detected   spidev_ioctl() -\u003e mutex_lock(\u0026spidev-\u003ebuf_lock)   spidev_sync_write() -\u003e mutex_lock(\u0026spidev-\u003espi_lock)   *** DEADLOCK ***  The issue is reproducible with a simple userspace program that performs write() and SPI_IOC_WR_MAX_SPEED_HZ ioctl() calls from separate threads on the same spidev file descriptor.  Fix this by simplifying the locking model and removing the lock inversion entirely. spidev_sync() no longer performs any locking, and all callers serialize access using spi_lock.  buf_lock is removed since its functionality is fully covered by spi_lock, eliminating the possibility of lock ordering issues.  This removes the lock inversion and prevents deadlocks without changing userspace ABI or behaviour.",
  "id": "DEBIAN-CVE-2026-43319",
  "modified": "2026-09-14T16:47:41.620702657Z",
  "published": "2026-05-08T14:16:40.480Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-43319"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-43319"
  ]
}