Vulnerability Description
A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer before a cloning operation, aka CID-dbcc7d57bffc.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.11.8 |
| Fedoraproject | Fedora | 32 |
| Debian | Debian Linux | 9.0 |
| Netapp | Cloud Backup | - |
| Netapp | Solidfire Baseboard Management Controller Firmware | - |
| Netapp | Aff A250 Firmware | - |
| Netapp | Aff A250 | - |
| Netapp | Fas 500F Firmware | - |
| Netapp | Fas 500F | - |
Related Weaknesses (CWE)
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbMailing ListVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20210430-0003/Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbMailing ListVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20210430-0003/Third Party Advisory
FAQ
What is CVE-2021-28964?
CVE-2021-28964 is a vulnerability with a CVSS score of 4.7 (MEDIUM). A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent...
How severe is CVE-2021-28964?
CVE-2021-28964 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-28964?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Debian Debian Linux, Netapp Cloud Backup, Netapp Solidfire Baseboard Management Controller Firmware.