Vulnerability Details : 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 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.
Vulnerability category: Memory CorruptionExecute code
Products affected by CVE-2021-4028
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:suse:linux_enterprise:15.0:sp4:*:*:*:*:*:*
- cpe:2.3:o:suse:linux_enterprise:15.0:sp3:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-4028
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-4028
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-4028
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by:
- nvd@nist.gov (Secondary)
- secalert@redhat.com (Primary)
References for CVE-2021-4028
-
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74
kernel/git/torvalds/linux.git - Linux kernel source treeMailing List;Patch;Vendor Advisory
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https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0
Bug 1193167 – VUL-0: CVE-2021-4028: kernel-source,kernel-source-rt,kernel-source-azure: kernel: use-after-free in RDMA listen()Issue Tracking;Patch;Third Party Advisory
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https://security.netapp.com/advisory/ntap-20221228-0002/
CVE-2021-4028 Linux Kernel Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
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https://access.redhat.com/security/cve/CVE-2021-4028
CVE-2021-4028- Red Hat Customer PortalThird Party Advisory
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https://bugzilla.redhat.com/show_bug.cgi?id=2027201
2027201 – (CVE-2021-4028) CVE-2021-4028 kernel: use-after-free in RDMA listen()Issue Tracking;Third Party Advisory
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https://lkml.org/lkml/2021/10/4/697
LKML: Greg Kroah-Hartman: [PATCH 5.10 22/93] RDMA/cma: Do not change route.addr.src_addr.ss_familyMailing List;Patch;Vendor Advisory
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