CVE-2021-28964
Medium
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.
SeverityMedium
CVSS4.7
Exploit probability—
Product
Linux Kernel
PublishedMar 22, 2021
First seenMar 22, 2021
How to fix
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v ≤ 5.11.8 | — |
| fedoraproject fedora | 32, 33, 34 | — |
| debian debian_linux | 9.0 | — |
| netapp cloud_backup | No range specified | — |
| netapp solidfire_baseboard_management_controller_firmware | No range specified | — |
| netapp aff_a250_firmware | No range specified | — |
| netapp fas_500f_firmware | No range specified | — |
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