VulnerabilityModified

CVE-2021-4028

HIGH 7.8EPSS 0.31%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.1: 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.31% probability · 24th percentile
CISA KEV: Not listed
Weakness: CWE-416
Affected: linux/linux kernel · suse/linux enterprise
Source: secalert@redhat.com

References

https://access.redhat.com/security/cve/CVE-2021-4028Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2027201Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74Mailing List, Patch, Vendor Advisory
https://lkml.org/lkml/2021/10/4/697Mailing List, Patch, Vendor 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 Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0bdc5afaa74Mailing List, Patch, Vendor Advisory
https://lkml.org/lkml/2021/10/4/697Mailing List, Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20221228-0002/Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.