Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10, < 5.10.71 |
| Suse | Linux Enterprise | 15.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2021-4028Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2027201Issue TrackingThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bcMailing ListPatchVendor Advisory
- https://lkml.org/lkml/2021/10/4/697Mailing ListPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20221228-0002/Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-4028Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2027201Issue TrackingThird Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bcMailing ListPatchVendor Advisory
- https://lkml.org/lkml/2021/10/4/697Mailing ListPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20221228-0002/Third Party Advisory
FAQ
What is CVE-2021-4028?
CVE-2021-4028 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2021-4028?
CVE-2021-4028 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4028?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Suse Linux Enterprise.