{
  "cveId": "CVE-2024-26998",
  "url": "https://patchblox.com/security/cve/CVE-2024-26998",
  "summary": "CVE-2024-26998 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-26998, released May 1, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  serial: core: Clearing the circular buffer befor...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  serial: core: Clearing the circular buffer before NULLifying it  The circular buffer is NULLified in uart_tty_port_shutdown() under the spin lock. However, the PM or other timer based callbacks may still trigger after this event without knowning that buffer pointer is not valid. Since the serial code is a bit inconsistent in checking the buffer state (some rely on the head-tail positions, some on the buffer pointer), it\u0027s better to have both aligned, i.e. buffer pointer to be NULL and head-tail possitions to be the same, meaning it\u0027s empty. This will prevent asynchronous calls to dereference NULL pointer as reported recently in 8250 case:    BUG: kernel NULL pointer dereference, address: 00000cf5   Workqueue: pm pm_runtime_work   EIP: serial8250_tx_chars (drivers/tty/serial/8250/8250_port.c:1809)   ...   ? serial8250_tx_chars (drivers/tty/serial/8250/8250_port.c:1809)   __start_tx (drivers/tty/serial/8250/8250_port.c:1551)   serial8250_start_tx (drivers/tty/serial/8250/8250_port.c:1654)   serial_port_runtime_suspend (include/linux/serial_core.h:667 drivers/tty/serial/serial_port.c:63)   __rpm_callback (drivers/base/power/runtime.c:393)   ? serial_port_remove (drivers/tty/serial/serial_port.c:50)   rpm_suspend (drivers/base/power/runtime.c:447)  The proposed change will prevent -\u003Estart_tx() to be called during suspend on shut down port.",
  "published": "2024-05-01T06:15:17Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0023,
  "epssPercentile": 0.13879,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.8.9-1",
      "fix": "DEBIAN-CVE-2024-26998",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-26998",
      "released": "2024-05-01T06:15:17Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.8.9-1",
      "fix": "DEBIAN-CVE-2024-26998",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-26998",
      "released": "2024-05-01T06:15:17Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}