CVE-2021-28951
First published: Sat Mar 20 2021(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| Linux Kernel | <=5.11.8 | |
| Fedora | =32 | |
| Fedora | =33 | |
| Fedora | =34 | |
| All of | ||
| netapp a250 firmware | ||
| netapp a250 | ||
| All of | ||
| netapp aff 500f firmware | ||
| netapp aff 500f | ||
| All of | ||
| netapp fas 500f firmware | ||
| netapp fas 500f | ||
| netapp cloud backup | ||
| All of | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller | ||
| netapp a250 firmware | ||
| netapp a250 | ||
| netapp aff 500f firmware | ||
| netapp aff 500f | ||
| netapp fas 500f firmware | ||
| netapp fas 500f | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller |
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Reference Links
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3ebba796fa251d042be42b929a2d916ee5c34a49
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/
- https://security.netapp.com/advisory/ntap-20210430-0003/
- https://launchpad.net/bugs/cve/CVE-2021-28951
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/
- https://git.kernel.org/linus/3ebba796fa251d042be42b929a2d916ee5c34a49
- https://security-tracker.debian.org/tracker/CVE-2021-28951
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28951
- https://nvd.nist.gov/vuln/detail/CVE-2021-28951
- https://ubuntu.com/security/CVE-2021-28951
Frequently Asked Questions
What is the severity of CVE-2021-28951?
CVE-2021-28951 has a severity rating of medium due to its potential to cause a denial of service through deadlocks.
How do I fix CVE-2021-28951?
To mitigate CVE-2021-28951, update to a non-vulnerable version of the Linux kernel, such as versions 5.10.223-1 or newer.
Which versions of the Linux kernel are affected by CVE-2021-28951?
CVE-2021-28951 affects Linux kernel versions up to and including 5.11.8.
What products are impacted by CVE-2021-28951?
CVE-2021-28951 impacts Linux Kernel and specific versions of Fedora including 32, 33, and 34.
How does CVE-2021-28951 affect system performance?
CVE-2021-28951 can lead to system crashes or unresponsiveness due to deadlocks in the IO_uring subsystem.
- agent/type
- collector/launchpad-cve
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- agent/severity
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- source/MITRE
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/remedy
- agent/first-publish-date
- agent/description
- agent/trending
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- collector/security-tracker-debian
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- agent/software-canonical-lookup
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- agent/event
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- source/NVD
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- collector/nvd-index
- package-manager/debian
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.11.8
- vendor/fedoraproject
- canonical/fedora
- version/fedora/32
- version/fedora/33
- version/fedora/34
- vendor/netapp
- canonical/netapp a250 firmware
- canonical/netapp a250
- canonical/netapp aff 500f firmware
- canonical/netapp aff 500f
- canonical/netapp fas 500f firmware
- canonical/netapp fas 500f
- canonical/netapp cloud backup
- canonical/netapp solidfire baseboard management controller firmware
- canonical/netapp solidfire baseboard management controller