high
7.2
CWE
119 120
Advisory Published
Updated

CVE-2021-28972: Buffer Overflow

First published: Mon Mar 22 2021(Updated: )

In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow 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<4.4.263
Linux Kernel>4.5<=4.9.263
Linux Kernel>=4.10<4.14.227
Linux Kernel>4.15<=4.19.183
Linux Kernel>=4.20<5.4.108
Linux Kernel>=5.5.0<5.10.26
Linux Kernel>=5.11<5.11.9
Fedora=32
Fedora=33
Fedora=34
netapp cloud backup
NetApp FAS/AFF Baseboard Management Controller
netapp solidfire baseboard management controller firmware

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc7a0bb058b85ea03db87169c60c7cfdd5d34678

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-28972?

    CVE-2021-28972 has a high severity due to the user-tolerable buffer overflow vulnerability that poses significant risks to system security.

  • How do I fix CVE-2021-28972?

    To fix CVE-2021-28972, you should upgrade your Linux kernel to versions 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, or 6.12.10-1.

  • Which systems are affected by CVE-2021-28972?

    CVE-2021-28972 affects various versions of the Linux kernel up to 5.11.8, including specific Fedora and NetApp versions.

  • What type of vulnerability is CVE-2021-28972?

    CVE-2021-28972 is classified as a buffer overflow vulnerability in the RPA PCI Hotplug driver.

  • Can CVE-2021-28972 lead to privileged access?

    Yes, CVE-2021-28972 can allow userspace to write data into the kernel stack frame, potentially leading to privilege escalation.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203