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HIGH · 7.8

CVE-2021-33200

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes...

Vulnerability Description

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
LinuxLinux Kernel>= 5.4.116, < 5.4.123
FedoraprojectFedora33
NetappCloud Backup-
NetappSolidfire \& Hci Management Node-
NetappSolidfire Baseboard Management Controller-
NetappH300S Firmware-
NetappH300S-
NetappH500S Firmware-
NetappH500S-
NetappH300E Firmware-
NetappH300E-
NetappH500E Firmware-
NetappH500E-
NetappH700E Firmware-
NetappH700E-
NetappH410S Firmware-
NetappH410S-
NetappH700S Firmware-
NetappH700S-

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2021-33200?

CVE-2021-33200 is a vulnerability with a CVSS score of 7.8 (HIGH). kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes...

How severe is CVE-2021-33200?

CVE-2021-33200 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-33200?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Netapp Cloud Backup, Netapp Solidfire \& Hci Management Node, Netapp Solidfire Baseboard Management Controller.