Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-50421

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
01/10/2025
Last modified:
14/01/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> rpmsg: char: Avoid double destroy of default endpoint<br /> <br /> The rpmsg_dev_remove() in rpmsg_core is the place for releasing<br /> this default endpoint.<br /> <br /> So need to avoid destroying the default endpoint in<br /> rpmsg_chrdev_eptdev_destroy(), this should be the same as<br /> rpmsg_eptdev_release(). Otherwise there will be double destroy<br /> issue that ept-&gt;refcount report warning:<br /> <br /> refcount_t: underflow; use-after-free.<br /> <br /> Call trace:<br /> refcount_warn_saturate+0xf8/0x150<br /> virtio_rpmsg_destroy_ept+0xd4/0xec<br /> rpmsg_dev_remove+0x60/0x70<br /> <br /> The issue can be reproduced by stopping remoteproc before<br /> closing the /dev/rpmsgX.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.18 (including) 5.19.17 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.0 (including) 6.0.3 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools