CVE-2021-37576: Input Validation
First published: Fri Jul 23 2021(Updated: )
A flaw was found on the Linux kernel. On the PowerPC platform, the KVM guest allows the OS users to cause host OS memory corruption via rtas_args.nargs. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:3.10.0-1160.45.1.el7 | 0:3.10.0-1160.45.1.el7 |
| redhat/kernel | <0:3.10.0-514.93.1.el7 | 0:3.10.0-514.93.1.el7 |
| redhat/kernel | <0:3.10.0-693.94.1.el7 | 0:3.10.0-693.94.1.el7 |
| redhat/kernel | <0:3.10.0-957.84.1.el7 | 0:3.10.0-957.84.1.el7 |
| redhat/kernel | <0:3.10.0-1062.59.1.el7 | 0:3.10.0-1062.59.1.el7 |
| redhat/kernel | <0:4.18.0-305.17.1.el8_4 | 0:4.18.0-305.17.1.el8_4 |
| redhat/kernel | <0:4.18.0-147.54.2.el8_1 | 0:4.18.0-147.54.2.el8_1 |
| redhat/kernel | <0:4.18.0-193.65.2.el8_2 | 0:4.18.0-193.65.2.el8_2 |
| redhat/kernel 5.14 | <4 | 4 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| Linux Kernel | >=3.10<4.4.277 | |
| Linux Kernel | >=4.5<4.9.277 | |
| Linux Kernel | >=4.10<4.14.241 | |
| Linux Kernel | >=4.15<4.19.199 | |
| Linux Kernel | >=4.20<5.4.136 | |
| Linux Kernel | >=5.5<5.10.54 | |
| Linux Kernel | >=5.11<5.13.6 | |
| Fedora | =33 | |
| Fedora | =34 |
Remedy
Mitigation for this issue is either not available or the currently available options does not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-37576 https://nvd.nist.gov/vuln/detail/CVE-2021-37576 https://www.openwall.com/lists/oss-security/2021/07/26/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1986506
- https://access.redhat.com/errata/RHSA-2021:3768
- https://access.redhat.com/errata/RHSA-2021:3801
- https://access.redhat.com/errata/RHSA-2021:3766
- https://access.redhat.com/errata/RHSA-2021:3725
- https://access.redhat.com/errata/RHSA-2021:3812
- https://access.redhat.com/errata/RHSA-2021:3814
- https://access.redhat.com/errata/RHSA-2021:3987
- https://access.redhat.com/errata/RHSA-2021:4000
- https://access.redhat.com/errata/RHSA-2021:3436
- https://access.redhat.com/errata/RHSA-2021:3447
- https://access.redhat.com/errata/RHSA-2021:3442
- https://access.redhat.com/errata/RHSA-2021:3444
- https://access.redhat.com/errata/RHSA-2021:3443
- https://access.redhat.com/errata/RHSA-2021:3446
- https://access.redhat.com/security/cve/cve-2021-37576
- http://www.openwall.com/lists/oss-security/2021/07/27/2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10a
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/
- https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf@mpe.ellerman.id.au/T/#u
- https://security.netapp.com/advisory/ntap-20210917-0005/
- https://www.debian.org/security/2021/dsa-4978
- https://launchpad.net/bugs/cve/CVE-2021-37576
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1986507
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDFA7DSQIPM7XPNXJBXFWXHJFVUBCAG6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2YZ2DNURMYYVDT2NYAFDESJC35KCUDS/
- https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf%40mpe.ellerman.id.au/T/#u
- https://git.kernel.org/linus/f62f3c20647ebd5fb6ecb8f0b477b9281c44c10a
- https://security-tracker.debian.org/tracker/CVE-2021-37576
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-37576
- https://nvd.nist.gov/vuln/detail/CVE-2021-37576
- https://ubuntu.com/security/CVE-2021-37576
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2021-37576?
CVE-2021-37576 has a high severity due to its potential impact on data confidentiality, integrity, and system availability.
How do I fix CVE-2021-37576?
To fix CVE-2021-37576, update your kernel to the recommended versions specified by your distribution.
Which systems are affected by CVE-2021-37576?
CVE-2021-37576 affects systems running specific versions of the Linux kernel, particularly on the PowerPC platform.
What type of vulnerability is CVE-2021-37576?
CVE-2021-37576 is a memory corruption vulnerability in the Linux kernel's KVM implementation.
Is there a workaround for CVE-2021-37576?
Currently, there are no documented workarounds for CVE-2021-37576; the best mitigation is to apply the necessary updates.
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