CVE-2021-27364
HIGHCVSS 7.1/10EPSS 0.96%
Last modified
CVE-2021-27364 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.
Description
An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Netapp | Cloud Backup | All versions |
| Linux | Linux Kernel | < 4.4.260 |
| Linux | Linux Kernel | >= 4.5, < 4.9.260 |
| Linux | Linux Kernel | >= 4.10, < 4.14.224 |
| Linux | Linux Kernel | >= 4.15, < 4.19.179 |
| Linux | Linux Kernel | >= 4.20, < 5.4.103 |
| Linux | Linux Kernel | >= 5.5, < 5.10.21 |
| Linux | Linux Kernel | >= 5.11, < 5.11.4 |
| Debian | Debian Linux | 9.0 |
| Netapp | Solidfire Baseboard Management Controller Firmware | All versions |
| Oracle | Tekelec Platform Distribution | >= 7.4.0, <= 7.7.1 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 20.04 |
References
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlThird Party Advisory, VDB Entry
- https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlExploit, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1182717Issue Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aaMailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/03/06/1Mailing List, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlThird Party Advisory, VDB Entry
- https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlExploit, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1182717Issue Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aaMailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/03/06/1Mailing List, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2021-27364?
An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.
How severe is CVE-2021-27364?
CVE-2021-27364 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27364?
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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