CVE-2021-43389
MEDIUMCVSS 5.5/10EPSS 0.67%
Last modified
CVE-2021-43389 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in the detach_capi_ctr function in drivers/isdn/capi/kcapi.c.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.
Description
An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in the detach_capi_ctr function in drivers/isdn/capi/kcapi.c.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.14.15 |
| Redhat | Enterprise Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Oracle | Communications Cloud Native Core Binding Support Function | 22.1.3 |
| Oracle | Communications Cloud Native Core Network Exposure Function | 22.1.1 |
| Oracle | Communications Cloud Native Core Policy | 22.2.0 |
References
- http://www.openwall.com/lists/oss-security/2021/11/05/1Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2013180Issue Tracking, Patch, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15Mailing List, Release Notes, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1f3e2e97c003f80c4b087092b225c8787ff91e4dMailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing List, Third Party Advisory
- https://seclists.org/oss-sec/2021/q4/39Exploit, Mailing List, Third Party Advisory
- https://www.debian.org/security/2022/dsa-5096Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/11/05/1Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2013180Issue Tracking, Patch, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15Mailing List, Release Notes, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1f3e2e97c003f80c4b087092b225c8787ff91e4dMailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing List, Third Party Advisory
- https://seclists.org/oss-sec/2021/q4/39Exploit, Mailing List, Third Party Advisory
- https://www.debian.org/security/2022/dsa-5096Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43389?
An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in the detach_capi_ctr function in drivers/isdn/capi/kcapi.c.
How severe is CVE-2021-43389?
CVE-2021-43389 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43389?
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.
Related CVEs from 2021
- CVE-2021-43360Sunnet eHRD e-mail delivery task schedule’s serialization fu…8.8
- CVE-2021-43361Improper Neutralization of Special Elements used in an SQL C…9.8
- CVE-2021-43362Improper Neutralization of Special Elements used in an SQL C…9.8
- CVE-2021-4337Sixteen XforWooCommerce Add-On Plugins for WordPress are vul…8.8
- CVE-2021-4338The 404 to 301 plugin for WordPress is vulnerable to authori…5.4
- CVE-2021-43388Unisys Cargo Mobile Application before 1.2.29 uses cleartext…7.5
- CVE-2021-4339The uListing plugin for WordPress is vulnerable to authoriza…5.3
- CVE-2021-43390An Out-of-Bounds Write vulnerability exists when reading a D…7.8
- CVE-2021-43391An Out-of-Bounds Read vulnerability exists when reading a DX…7.8
- CVE-2021-43392STMicroelectronics STSAFE-J 1.1.4, J-SAFE3 1.2.5, and J-SIGN…6.2
- CVE-2021-43393STMicroelectronics STSAFE-J 1.1.4, J-SAFE3 1.2.5, and J-SIGN…6.2
- CVE-2021-43394Unisys OS 2200 Messaging Integration Services (NTSI) 7R3B IC…9.8
Are you affected by CVE-2021-43389?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST