Vulnerability Database

309,540

Total vulnerabilities in the database

CVE-2023-53111

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

loop: Fix use-after-free issues

do_req_filebacked() calls blk_mq_complete_request() synchronously or asynchronously when using asynchronous I/O unless memory allocation fails. Hence, modify loop_handle_cmd() such that it does not dereference 'cmd' nor 'rq' after do_req_filebacked() finished unless we are sure that the request has not yet been completed. This patch fixes the following kernel crash:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000054 Call trace: css_put.42938+0x1c/0x1ac loop_process_work+0xc8c/0xfd4 loop_rootcg_workfn+0x24/0x34 process_one_work+0x244/0x558 worker_thread+0x400/0x8fc kthread+0x16c/0x1e0 ret_from_fork+0x10/0x20

  • Published: May 2, 2025
  • Updated: Nov 11, 2025
  • CVE: CVE-2023-53111
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.8
  • AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWEs:

Software From Fixed in
linux / linux_kernel 4.4 5.15.104
linux / linux_kernel 5.16 6.1.21
linux / linux_kernel 6.2 6.2.8
linux / linux_kernel 6.3-rc1 6.3-rc1.x
linux / linux_kernel 6.3-rc2 6.3-rc2.x