PT-2022-7479 · Linux+5 · Linux Kernel+5
Syzbot
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Published
2022-02-28
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Updated
2025-09-29
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CVE-2022-48912
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.17.1
Description
A critical vulnerability in the Linux kernel has been resolved, affecting versions prior to 5.17.1. The vulnerability is related to a use-after-free issue in the
nf register net hook() function, which can be exploited by attackers to compromise the confidentiality, integrity, and availability of protected information. The vulnerability is caused by dereferencing @new hooks after nf hook mutex has been released, allowing other threads to free the allocated hooks.Recommendations
To resolve this issue, upgrade to Linux kernel version 5.17.1 or later. As a temporary workaround, consider disabling the
nf register net hook() function until a patch is available. Restrict access to the vulnerable netfilter module to minimize the risk of exploitation. Avoid using the nf hook entries get hook ops and hooks validate functions in the affected API endpoints until the issue is resolved.Exploit
Fix
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Centos
Linux Kernel
Red Hat
Red Os
Suse