CVE & CISA-KEV Catalog

CVE-2022-4696

HIGH
7.8
CVSS v3
NVD

Description

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

CWE-763CWE-416Use After Free

How to fix

Remediation Available
linuxDebian
Fixed in:5.10.162-1CVE-2022-4696
Fixed in:5.14.6-1CVE-2022-4696
Fixed in:5.14.6-1CVE-2022-4696
Fixed in:5.14.6-1CVE-2022-4696

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

0.41%probability of exploitation in 30 days
32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Exploit1
Other references1
Embed a live status badge for CVE-2022-4696
CVE-2022-4696 severity badge

Markdown

[![CVE-2022-4696](https://tridentstack.com/cve/badge/CVE-2022-4696.svg)](https://tridentstack.com/cve/CVE-2022-4696)

HTML

<a href="https://tridentstack.com/cve/CVE-2022-4696"><img src="https://tridentstack.com/cve/badge/CVE-2022-4696.svg" alt="CVE-2022-4696"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.