Medium severity5.5NVD Advisory· Published Mar 20, 2021· Updated Jun 17, 2026
CVE-2021-28951
CVE-2021-28951
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.
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Affected products
2- Linux/Linux kerneldescription
Patches
Vulnerability mechanics
References
5- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/nvdPatchVendor Advisory
- security.netapp.com/advisory/ntap-20210430-0003/nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/nvd
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