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CVE-2021-28972

MEDIUM
6.7
CVSS Score
Published: March 22, 2021 at 04:53 PM UTC
Updated: October 8, 2026 at 09:17 PM UTC
5 products affected across 3 vendorsLinux KernelFedoraCloud Backup

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
323334
Linux Kernel· Linux
95%
v < 4.4.2634.10 ≤ v < 4.14.2274.20 ≤ v < 5.4.1085.11 ≤ v < 5.11.95.5.0 ≤ v < 5.10.264.15 < v ≤ 4.19.1834.5 < v ≤ 4.9.263*
Affected range stops below 4.14.227, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.263, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.10.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.11.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.108, so it looks safe — our inference, not a vendor statement
Cloud Backup· NetAppdrupal
95%
-
Fas /aff Baseboard Management Controller· NetApp
95%
-
Solidfire Baseboard Management Controller Firmware· NetApp
95%
-

References (5)

x_refsource_MISCMailing ListPatchVendor Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc7a0bb058b85ea03db87169c60c7cfdd5d34678
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210430-0003/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.7MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-120

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