medium
5.5
CWE
667
Advisory Published
Updated

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 SoftwareAffected VersionHow to fix
Linux Kernel<=5.11.8
Red Hat Fedora=32
Red Hat Fedora=33
Red Hat Fedora=34
NetApp A250
NetApp
NetApp FAS 500F Firmware
NetApp AFF 500F Firmware
NetApp FAS500F Firmware
NetApp FAS500F Firmware
NetApp Cloud Backup
NetApp SolidFire Baseboard Management Controller Firmware
NetApp SolidFire
All of
NetApp A250
NetApp
All of
NetApp FAS 500F Firmware
NetApp AFF 500F Firmware
All of
NetApp FAS500F Firmware
NetApp FAS500F Firmware
All of
NetApp SolidFire Baseboard Management Controller Firmware
NetApp SolidFire
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.20-1
6.12.21-1

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3ebba796fa251d042be42b929a2d916ee5c34a49

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Reference Links

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.

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