CVE-2022-4129: Race Condition
First published: Wed Aug 10 2022(Updated: )
A flaw was found in the Linux kernel's Layer 2 Tunneling Protocol (L2TP). A missing lock when clearing sk_user_data can lead to a race condition and NULL pointer dereference. A local user could use this flaw to potentially crash the system causing a denial of service.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-477.10.1.rt7.274.el8_8 | 0:4.18.0-477.10.1.rt7.274.el8_8 |
| redhat/kernel | <0:4.18.0-477.10.1.el8_8 | 0:4.18.0-477.10.1.el8_8 |
| 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 |
| Linux Layer 2 Tunneling Protocol | <6.0 | |
| Fedora | =35 | |
| Fedora | =36 | |
| Fedora | =37 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.17-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-4129 https://nvd.nist.gov/vuln/detail/CVE-2022-4129
- https://bugzilla.redhat.com/show_bug.cgi?id=2134528
- https://access.redhat.com/errata/RHSA-2023:2736
- https://access.redhat.com/errata/RHSA-2023:2951
- https://access.redhat.com/errata/RHSA-2023:2458
- https://access.redhat.com/errata/RHSA-2023:2148
- https://access.redhat.com/security/cve/cve-2022-4129
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7X5SPXMXXFANDASPCKER2JIQO2F3UHCP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AM5KFIE6JNZXHBA5A2KYDZAT3MEX2B67/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG/
- https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t
- https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t
- https://launchpad.net/bugs/cve/CVE-2022-4129
- https://lore.kernel.org/all/20220823101459.211986-1-jakub@cloudflare.com/t
- https://lore.kernel.org/all/20220815130107.149345-1-jakub@cloudflare.com/t
- https://lore.kernel.org/all/20220810102848.282778-1-jakub@cloudflare.com/t
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2134528#c0
- https://lore.kernel.org/all/20221114191619.124659-1-jakub@cloudflare.com/t
- https://lore.kernel.org/netdev/20221121085426.21315-1-jakub@cloudflare.com/t
- https://lore.kernel.org/netdev/20221119130317.39158-1-jakub@cloudflare.com/t
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2145237
- https://access.redhat.com/errata/RHSA-2024:0412
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4129
- https://nvd.nist.gov/vuln/detail/CVE-2022-4129
- https://security-tracker.debian.org/tracker/CVE-2022-4129
- https://ubuntu.com/security/CVE-2022-4129
- https://git.kernel.org/linus/b68777d54fac21fc833ec26ea1a2a84f975ab035
- https://git.kernel.org/linus/af295e854a4e3813ffbdef26dbb6a4d6226c3ea1
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2022-4129?
CVE-2022-4129 is classified as a high severity vulnerability due to its potential to cause a denial of service.
How do I fix CVE-2022-4129?
To fix CVE-2022-4129, update the kernel to the latest version specified in the remediation details.
What could happen if CVE-2022-4129 is exploited?
Exploitation of CVE-2022-4129 could lead to a race condition that results in a NULL pointer dereference, potentially crashing the system.
Which systems are affected by CVE-2022-4129?
CVE-2022-4129 affects various versions of the Linux kernel, including specific Fedora and Red Hat kernel packages.
Is CVE-2022-4129 a local or remote vulnerability?
CVE-2022-4129 is a local vulnerability that requires an authenticated user to exploit.
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