CVE-2021-41073
HIGHCVSS 7.8/10EPSS 1.69%
Last modified
CVE-2021-41073 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.. EPSS estimates a 1.69% chance of exploitation in the next 30 days.
Description
loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10, < 5.10.68 |
| Linux | Linux Kernel | >= 5.11, < 5.14.7 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Netapp | Cloud Backup | All versions |
| Netapp | Solidfire Baseboard Management Controller | All versions |
| Netapp | H410c Firmware | All versions |
| Netapp | H300s Firmware | 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 |
References
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/4Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211014-0003/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/06/04/4Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211014-0003/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-41073?
loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.
How severe is CVE-2021-41073?
CVE-2021-41073 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.69% probability of exploitation in the next 30 days.
How do I fix CVE-2021-41073?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-41073?
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Scan your code nowSource: NVD / NIST