CVE-2022-49223

HIGH EPSS 15.6%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: cxl/port: Hold port reference until decoder release KASAN + DEBUG_KOBJECT_RELEASE reports a potential use-after-free in cxl_decoder_release() where it goes to reference its parent, a cxl_port, to free its id back to port->decoder_ida. BUG: KASAN: use-after-free in to_cxl_port+0x18/0x90 [cxl_core] Read of size 8 at addr ffff888119270908 by task kworker/35:2/379 CPU: 35 PID: 379 Comm: kworker/35:2 Tainted: G OE 5.17.0-rc2+ #198 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Workqueue: events kobject_delayed_cleanup Call Trace: <TASK> dump_stack_lvl+0x59/0x73 print_address_description.constprop.0+0x1f/0x150 ? to_cxl_port+0x18/0x90 [cxl_core] kasan_report.cold+0x83/0xdf ? to_cxl_port+0x18/0x90 [cxl_core] to_cxl_port+0x18/0x90 [cxl_core] cxl_decoder_release+0x2a/0x60 [cxl_core] device_release+0x5f/0x100 kobject_cleanup+0x80/0x1c0 The device core only guarantees parent lifetime until all children are unregistered. If a child needs a parent to complete its ->release() callback that child needs to hold a reference to extend the lifetime of the parent.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
15.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥5.14  –  <5.15.54
linuxlinux_kernel*≥5.16  –  <5.16.19
linuxlinux_kernel*≥5.17  –  <5.17.2

References 4

  • git.kernel.org https://git.kernel.org/stable/c/49f2dab77a5e1354f5da6ccdc9346a8212697be2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/518bb96367123062b48b0a9842f2864249b565f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/74be98774dfbc5b8b795db726bd772e735d2edd4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b0022ca445d5fc4d0c89d15dcd0f855977b22c1d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/49f2dab77a5e1354f5da6ccdc9346a8212697be2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/518bb96367123062b48b0a9842f2864249b565f6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/74be98774dfbc5b8b795db726bd772e735d2edd4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b0022ca445d5fc4d0c89d15dcd0f855977b22c1d
    Patch