CVE-2021-34693
MEDIUMCVSS 5.5/10EPSS 0.47%
Last modified
CVE-2021-34693 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.
Description
net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.25, <= 5.12.10 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
References
- http://www.openwall.com/lists/oss-security/2021/06/15/1Exploit, Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00014.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00016.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4941Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/06/15/1Exploit, Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00014.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00016.htmlMailing List, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4941Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-34693?
net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized.
How severe is CVE-2021-34693?
CVE-2021-34693 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34693?
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-2021-34693?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST