CVE-2023-1583

2023-03-2400:00:00

CWE-476

redhat

www.cve.org

linux kernel

io_uring

null pointer dereference

filetable

system crash

AI Score

6.3

Confidence

High

EPSS

Percentile

9.0%

JSON

A NULL pointer dereference was found in io_file_bitmap_get in io_uring/filetable.c in the io_uring sub-component in the Linux Kernel. When fixed files are unregistered, some context information (file_alloc_{start,end} and alloc_hint) is not cleared. A subsequent request that has auto index selection enabled via IORING_FILE_INDEX_ALLOC can cause a NULL pointer dereference. An unprivileged user can use the flaw to cause a system crash.

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "Linux kernel",
    "versions": [
      {
        "version": "affected kernel 5.19, 6.0, 6.1, 6.2, 6.3",
        "status": "affected"
      }
    ]
  }
]