CVE-2021-3659: Null Pointer Dereference
First published: Tue Apr 06 2021(Updated: )
A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the system. The highest threat from this vulnerability is to system availability.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-348.rt7.130.el8 | 0:4.18.0-348.rt7.130.el8 |
| redhat/kernel | <0:4.18.0-348.el8 | 0:4.18.0-348.el8 |
| Linux Linux kernel | <5.12 | |
| Fedoraproject Fedora | =34 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux For Ibm Z Systems | =8.0 | |
| Redhat Enterprise Linux For Ibm Z Systems Eus | =8.6 | |
| Redhat Enterprise Linux For Power Little Endian Eus | =8.6 | |
| Redhat Enterprise Linux For Real Time | =8.0 | |
| Redhat Enterprise Linux For Real Time For Nfv | =8.0 | |
| Redhat Enterprise Linux For Real Time For Nfv Tus | =8.6 | |
| Redhat Enterprise Linux For Real Time Tus | =8.6 | |
| Redhat Enterprise Linux Server Aus | =8.6 | |
| Redhat Enterprise Linux Server Eus | =8.6 | |
| Redhat Enterprise Linux Server Tus | =8.6 | |
| Redhat Codeready Linux Builder | ||
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux Eus | =8.6 | |
| Redhat Enterprise Linux For Power Little Endian | =8.0 | |
| Redhat Enterprise Linux For Power Little Endian Eus | =8.6 | |
| Redhat Virtualization Host | =4.0 | |
| All of | ||
| Any of | ||
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux Eus | =8.6 | |
| Redhat Enterprise Linux For Power Little Endian | =8.0 | |
| Redhat Enterprise Linux For Power Little Endian Eus | =8.6 | |
| Redhat Codeready Linux Builder | ||
| All of | ||
| Redhat Enterprise Linux | =8.0 | |
| Redhat Virtualization Host | =4.0 | |
| redhat/Kernel | <5.12 | 5.12 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.106-3 6.1.112-1 6.11.4-1 6.11.5-1 |
Remedy
To mitigate this issue, prevent the module mac802154 from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3659 https://nvd.nist.gov/vuln/detail/CVE-2021-3659 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8
- https://bugzilla.redhat.com/show_bug.cgi?id=1975949
- https://access.redhat.com/errata/RHSA-2021:4140
- https://access.redhat.com/errata/RHSA-2021:4356
- https://access.redhat.com/security/cve/cve-2021-3659
- https://access.redhat.com/security/cve/CVE-2021-3659
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8
- https://launchpad.net/bugs/cve/CVE-2021-3659
- https://syzkaller.appspot.com/bug?extid=12cf5fbfdeba210a89dd
- https://access.redhat.com/security/cve/CVE-2021-33033
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1984560
- https://git.kernel.org/linus/1165affd484889d4986cf3b724318935a0b120d8
- https://security-tracker.debian.org/tracker/CVE-2021-3659
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3659
- https://nvd.nist.gov/vuln/detail/CVE-2021-3659
- https://ubuntu.com/security/CVE-2021-3659
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