CVE-2021-29646: Input Validation
First published: Mon Mar 15 2021(Updated: )
A flaw buffer overflow in the Linux kernel TIPC protocol functionality was found in the way user uses protocol with encryption enabled. A local user could use this flaw to crash the system.
Credit: cve@mitre.org
| 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 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 | |
| Linux kernel | <5.11.11 | |
| Fedora | =32 | |
| Fedora | =33 | |
| Fedora | =34 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-29646 https://nvd.nist.gov/vuln/detail/CVE-2021-29646
- https://bugzilla.redhat.com/show_bug.cgi?id=1945345
- https://access.redhat.com/errata/RHSA-2021:4140
- https://access.redhat.com/errata/RHSA-2021:4356
- https://access.redhat.com/security/cve/cve-2021-29646
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.11
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0217ed2848e8538bcf9172d97ed2eeb4a26041bb
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RZGMUP6QEHJJEKPMLKOSPWYMW7PXFC2M/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VTADK5ELGTATGW2RK3K5MBJ2WGYCPZCM/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WKRNELXLVFDY6Y5XDMWLIH3VKIMQXLLR/
- https://launchpad.net/bugs/cve/CVE-2021-29646
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1945346
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RZGMUP6QEHJJEKPMLKOSPWYMW7PXFC2M/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VTADK5ELGTATGW2RK3K5MBJ2WGYCPZCM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WKRNELXLVFDY6Y5XDMWLIH3VKIMQXLLR/
- https://git.kernel.org/linus/0217ed2848e8538bcf9172d97ed2eeb4a26041bb
- https://security-tracker.debian.org/tracker/CVE-2021-29646
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29646
- https://nvd.nist.gov/vuln/detail/CVE-2021-29646
- https://ubuntu.com/security/CVE-2021-29646
Frequently Asked Questions
What is the severity of CVE-2021-29646?
CVE-2021-29646 is classified as a high severity vulnerability due to the potential for a local user to crash the system.
How do I fix CVE-2021-29646?
To fix CVE-2021-29646, update the kernel to a version that is patched, such as 0:4.18.0-348.rt7.130.el8 for kernel-rt or 0:4.18.0-348.el8 for kernel.
Which systems are affected by CVE-2021-29646?
CVE-2021-29646 affects various Linux kernel versions prior to 5.11.11 and specific Fedora releases such as Fedora 32, 33, and 34.
Can CVE-2021-29646 be exploited remotely?
CVE-2021-29646 cannot be exploited remotely as it requires local access to the system.
What is the impact of exploiting CVE-2021-29646?
Exploiting CVE-2021-29646 can lead to a buffer overflow that crashes the affected system, resulting in denial of service.
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