Information disclosure in Linux Kernel
CVE-2021-3923
A flaw was found in the Linux kernel's implementation of RDMA over infiniband. An attacker with a privileged local account can leak kernel stack information when issuing commands to the /dev/infiniband/rdma_cm device node. While this access is unlikely to leak sensitive user information, it can be further used to defeat existing kernel protection mechanisms.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (8.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Linux Kernel
- Fedoraproject Fedora — versions 37
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Kernel
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- lore.kernel.org/all/20220204100036.GA12348@kili/
Frequently asked questions
- What is CVE-2021-3923?
- CVE-2021-3923 is a low-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 2.3/10. Published 2023-03-27.
- How severe is CVE-2021-3923?
- Low severity. CVSS v3 base score is 2.3 out of 10.