What is CVE-2022-4696?

CVE-2022-4696 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Release of Invalid Pointer or Reference flaw (CWE-763), affecting Linux kernel versions from 5.7-rc1 onward. CVE-2022-4696 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-4696?

CVE-2022-4696 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2022-4696?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2022-4696 patch availability.

Is CVE-2022-4696 actively exploited?

CVE-2022-4696 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Release of Invalid Pointer or Reference (CWE-763)?

The product attempts to return a memory resource to the system but calls the wrong release function. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/763.html

CVE-2022-4696

High

There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above

Package Linux Kernel

Published 2023-01-11

Last modified 2024-11-21

CVSS version 3.1

Patch available

Not yet patched

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-763

CVE-2022-4696 is a Release of Invalid Pointer or Reference vulnerability

What is Release of Invalid Pointer or Reference?

The product attempts to return a memory resource to the system but calls the wrong release function. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.7-rc1 and later are affected. No fixed version recorded yet.

Affected from

≥ 5.7-rc1

References

3 total

Kernel
https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a

Exploit Third Party Advisory
Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=75454b4bbfc7e6a4dd8338556f36ea9107ddf61a

Mailing List Patch Vendor Advisory
Security
https://security.netapp.com/advisory/ntap-20230223-0003/

Details

CVE ID CVE-2022-4696

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2023-01-11

Modified 2024-11-21

KEV No

Patch

Not yet patched

Package linux

Frequently asked questions

What is CVE-2022-4696?

CVE-2022-4696 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Release of Invalid Pointer or Reference flaw (CWE-763) . It affects Linux kernel versions from 5.7-rc1 onward . CVE-2022-4696 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-4696?

CVE-2022-4696 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2022-4696?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2022-4696 patch availability.
Is CVE-2022-4696 actively exploited?

No. CVE-2022-4696 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.