CVE-2021-31440
Last modified
CVE-2021-31440 is a high-severity vulnerability rated 7/10 on the CVSS scale. This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. EPSS estimates a 1.75% chance of exploitation in the next 30 days.
Description
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.7, < 5.10.37 |
| Linux | Linux Kernel | >= 5.11, < 5.11.21 |
| Linux | Linux Kernel | >= 5.12, < 5.12.4 |
| Netapp | Solidfire Baseboard Management Controller Firmware | All versions |
| Netapp | Cloud Backup | All versions |
| Netapp | H500s Firmware | All versions |
| Netapp | H700s Firmware | All versions |
| Netapp | H300e Firmware | All versions |
| Netapp | H500e Firmware | All versions |
| Netapp | H700e Firmware | All versions |
| Netapp | H410s Firmware | All versions |
| Netapp | H300s Firmware | All versions |
References
- https://security.netapp.com/advisory/ntap-20210706-0003/Third Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-503/Third Party Advisory, VDB Entry
- https://security.netapp.com/advisory/ntap-20210706-0003/Third Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-503/Third Party Advisory, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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