CVE-2021-28972

medium

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.

References

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

https://lists.fedoraproject.org/archives/list/[email protected]/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/

https://lists.fedoraproject.org/archives/list/[email protected]/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/

https://lists.fedoraproject.org/archives/list/[email protected]/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/

https://security.netapp.com/advisory/ntap-20210430-0003/

Details

Source: MITRE

Published: 2021-03-22

Updated: 2022-06-03

Type: CWE-120

Risk Information

CVSS v2

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3

Base Score: 6.7

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 0.8

Severity: MEDIUM