High severity · published Aug 24, 2022
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 socket to listen on a high port allowing…
7.8
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.10 before 5.10.71; 5.11 before 5.14.10 · source: NVD
LE
Linux Enterprise · Suse
15.0; 15.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4028
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4028
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4028
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2027201
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0
Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74
Mailing List
https://lkml.org/lkml/2021/10/4/697
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221228-0002/
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