CVE-2024-42135 vhost_task: Handle SIGKILL by flushing work and exiting

2024-07-3007:46:30

Linux

www.cve.org

linux kernel

cve-2024-42135

vhost_task vulnerability

EPSS

Percentile

16.2%

JSON

In the Linux kernel, the following vulnerability has been resolved:

vhost_task: Handle SIGKILL by flushing work and exiting

Instead of lingering until the device is closed, this has us handle
SIGKILL by:

marking the worker as killed so we no longer try to use it with
new virtqueues and new flush operations.
setting the virtqueue to worker mapping so no new works are queued.
running all the exiting works.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/vhost/vhost.c",
      "drivers/vhost/vhost.h",
      "include/linux/sched/vhost_task.h",
      "kernel/vhost_task.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "abe067dc3a66",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "dec987fe2df6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "db5247d9bf5c",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/vhost/vhost.c",
      "drivers/vhost/vhost.h",
      "include/linux/sched/vhost_task.h",
      "kernel/vhost_task.c"
    ],
    "versions": [
      {
        "version": "6.6.39",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.9",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]