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CVE-2021-4028
A flaw in the Linux kernel's implementation of RDMA communications manager listener code allowed an attacker with local access to setup a…
High7.8EPSS 0.32%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A flaw in the Linux kernel's implementation of RDMA communications manager listener code allowed an attacker with local access to setup a socket to listen on a high port allowing for a list element to be used after free. Given the ability to execute code, a local attacker could leverage this use-after-free to crash the system or possibly escalate privileges on the system.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.32% · top 75% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
kernel
- affected Fixed in kernel 5.15-rc1
References (6)
- https://lkml.org/lkml/2021/10/4/697 (opens in a new tab)x_transferred
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74 (opens in a new tab)x_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=2027201 (opens in a new tab)x_transferred
- https://access.redhat.com/security/cve/CVE-2021-4028 (opens in a new tab)x_transferred
- https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20221228-0002/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-4028)Record last updated .