CVE-2021-28951
Medium
Description
An issue was discovered in fs/io_uring.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (deadlock) because exit may be waiting to park a SQPOLL thread, but concurrently that SQPOLL thread is waiting for a signal to start, aka CID-3ebba796fa25.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMar 20, 2021
First seenMar 20, 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 | — |
| netapp a250_firmware | No range specified | — |
| netapp aff_500f_firmware | No range specified | — |
| netapp fas_500f_firmware | No range specified | — |
| netapp cloud_backup | No range specified | — |
| netapp solidfire_baseboard_management_controller_firmware | No range specified | — |
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