CVE-2022-4128: Null Pointer Dereference
First published: Mon Jul 11 2022(Updated: )
A NULL pointer dereference issue was discovered in the Linux kernel in the MPTCP protocol when traversing the subflow list at disconnect time. A local user could use this flaw to potentially crash the system causing a denial of service.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:5.14.0-284.11.1.el9_2 | 0:5.14.0-284.11.1.el9_2 |
| redhat/kernel-rt | <0:5.14.0-284.11.1.rt14.296.el9_2 | 0:5.14.0-284.11.1.rt14.296.el9_2 |
| redhat/kernel | <5.19 | 5.19 |
| Linux MPTCP Protocol | <5.19 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-4128 https://nvd.nist.gov/vuln/detail/CVE-2022-4128
- https://bugzilla.redhat.com/show_bug.cgi?id=2134380
- https://access.redhat.com/errata/RHSA-2023:2458
- https://access.redhat.com/errata/RHSA-2023:2148
- https://access.redhat.com/security/cve/cve-2022-4128
- https://github.com/torvalds/linux/commit/5c835bb142d4
- https://lore.kernel.org/netdev/20220708233610.410786-2-mathew.j.martineau@linux.intel.com/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2145216
- https://lore.kernel.org/netdev/20220708233610.410786-2-mathew.j.martineau%40linux.intel.com/
Frequently Asked Questions
What is the severity of CVE-2022-4128?
CVE-2022-4128 has been classified with a severity level of high due to its potential to cause a denial of service.
How do I fix CVE-2022-4128?
To remediate CVE-2022-4128, upgrade to kernel version 0:5.14.0-284.11.1.el9_2 or higher.
Who is affected by CVE-2022-4128?
CVE-2022-4128 affects local users on systems running vulnerable versions of the Linux kernel with MPTCP protocol.
What is the impact of CVE-2022-4128?
The impact of CVE-2022-4128 is that it could allow a local user to crash the system, resulting in a denial of service.
Is CVE-2022-4128 a remote or local vulnerability?
CVE-2022-4128 is a local vulnerability, as it requires access to the affected system to exploit.
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