CVE-2021-28951
MEDIUMLinux Kernel < 5.11.8 - Denial of Service via io_uring SQPOLL Deadlock
Title source: llmDescription
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.
References (5)
Core 5
Core References
Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3ebba796fa251d042be42b929a2d916ee5c34a49
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210430-0003/
Scores
CVSS v3
5.5
EPSS
0.0005
EPSS Percentile
14.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-667
Status
published
Products (9)
fedoraproject/fedora
32
fedoraproject/fedora
33
fedoraproject/fedora
34
linux/linux_kernel
< 5.11.8
netapp/a250_firmware
netapp/aff_500f_firmware
netapp/cloud_backup
netapp/fas_500f_firmware
netapp/solidfire_baseboard_management_controller_firmware
Published
Mar 20, 2021
Tracked Since
Feb 18, 2026