CVE-2022-1055: Use after Free in tc_new_tfilter allowing for privilege escalation in Linux Kernel
First published: Mon Jan 31 2022(Updated: )
A use-after-free exists in the Linux Kernel in tc_new_tfilter that could allow a local attacker to gain privilege escalation. The exploit requires unprivileged user namespaces. We recommend upgrading past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-425.3.1.rt7.213.el8 | 0:4.18.0-425.3.1.rt7.213.el8 |
| redhat/kernel | <0:4.18.0-425.3.1.el8 | 0:4.18.0-425.3.1.el8 |
| redhat/kernel | <0:5.14.0-70.22.1.el9_0 | 0:5.14.0-70.22.1.el9_0 |
| redhat/kernel-rt | <0:5.14.0-70.22.1.rt21.94.el9_0 | 0:5.14.0-70.22.1.rt21.94.el9_0 |
| redhat/kernel | <5.17 | 5.17 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.13-1 | |
| Linux Kernel | >=5.1<5.17 | |
| Linux Kernel | =5.17 | |
| Linux Kernel | =5.17-rc1 | |
| Linux Kernel | =5.17-rc2 | |
| Red Hat Enterprise Linux | =8.0 | |
| Fedora | =35 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =20.04 | |
| Ubuntu | =21.10 | |
| Ubuntu | =22.04 | |
| All of | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| All of | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| All of | ||
| netapp h700s | ||
| netapp h700s firmware | ||
| All of | ||
| netapp h300e | ||
| netapp h300e firmware | ||
| All of | ||
| netapp h500e | ||
| netapp h500e firmware | ||
| All of | ||
| netapp h700e | ||
| netapp h700e firmware | ||
| All of | ||
| netapp h410s | ||
| netapp h410s firmware | ||
| All of | ||
| netapp h410c | ||
| netapp h410c firmware | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| netapp h300e firmware | ||
| netapp h300e | ||
| netapp h500e firmware | ||
| netapp h500e | ||
| netapp h700e firmware | ||
| netapp h700e | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| netapp h410c firmware | ||
| netapp h410c |
Remedy
On non-containerized deployments of Red Hat Enterprise Linux 8, you can disable user namespaces by setting user.max_user_namespaces to 0: # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf On containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-1055 https://nvd.nist.gov/vuln/detail/CVE-2022-1055 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5 https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc
- https://bugzilla.redhat.com/show_bug.cgi?id=2070220
- https://access.redhat.com/errata/RHSA-2022:7444
- https://access.redhat.com/errata/RHSA-2022:7683
- https://access.redhat.com/errata/RHSA-2022:6003
- https://access.redhat.com/errata/RHSA-2022:6002
- https://access.redhat.com/security/cve/cve-2022-1055
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
- https://kernel.dance/#04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
- https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc
- https://security.netapp.com/advisory/ntap-20220506-0007/
- http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html
- https://launchpad.net/bugs/cve/CVE-2022-1055
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2070221
- https://access.redhat.com/errata/RHSA-2024:1188
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1055
- https://nvd.nist.gov/vuln/detail/CVE-2022-1055
- https://security-tracker.debian.org/tracker/CVE-2022-1055
- https://ubuntu.com/security/CVE-2022-1055
- https://git.kernel.org/linus/04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2022-1055?
CVE-2022-1055 has a high severity due to its potential for local privilege escalation in the Linux Kernel.
How do I fix CVE-2022-1055?
To fix CVE-2022-1055, upgrade your kernel to a version higher than 0:4.18.0-425.3.1.rt7.213.el8 or 0:4.18.0-425.3.1.el8.
Which software is affected by CVE-2022-1055?
CVE-2022-1055 affects several versions of the Linux Kernel, specifically versions up to 5.17.
What types of systems are vulnerable to CVE-2022-1055?
Systems running unprivileged user namespaces on affected Linux kernel versions are vulnerable to CVE-2022-1055.
Is there a specific patch for CVE-2022-1055?
Yes, the recommended patches for CVE-2022-1055 are included in kernel versions starting from specific updates as detailed in the vulnerability report.
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