CVE-2021-4149
First published: Mon Oct 18 2021(Updated: )
A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree.c in the Linux kernel due to an improper lock operation in btrfs. In this flaw, a user with a local privilege may cause a denial of service (DOS) due to a deadlock problem.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.15 | |
| Linux Linux kernel | =5.15 | |
| Linux Linux kernel | =5.15-rc1 | |
| Linux Linux kernel | =5.15-rc2 | |
| Linux Linux kernel | =5.15-rc3 | |
| Linux Linux kernel | =5.15-rc4 | |
| Linux Linux kernel | =5.15-rc5 | |
| Debian Debian Linux | =9.0 | |
| redhat/kernel | <5.15 | 5.15 |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't 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-2021-4149 https://nvd.nist.gov/vuln/detail/CVE-2021-4149 https://lkml.org/lkml/2021/10/18/885 https://lkml.org/lkml/2021/9/13/2565
- https://bugzilla.redhat.com/show_bug.cgi?id=2026485
- https://access.redhat.com/security/cve/cve-2021-4149
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html
- https://lkml.org/lkml/2021/10/18/885
- https://lkml.org/lkml/2021/9/13/2565
- https://launchpad.net/bugs/cve/CVE-2021-4149
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4149
- https://nvd.nist.gov/vuln/detail/CVE-2021-4149
- https://security-tracker.debian.org/tracker/CVE-2021-4149
- https://ubuntu.com/security/CVE-2021-4149
- https://git.kernel.org/linus/19ea40dddf1833db868533958ca066f368862211
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