CVE-2021-4028

CWE-416 — Use After Free6 documents6 sources
Severity
7.8HIGH
EPSS
0.0%
top 90.41%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Linux Linux KernelSuse Linux Enterprise
Timeline
PublishedAug 24
Latest updateAug 25

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:HExploitability: 1.8 | Impact: 5.9

Affected Packages3 packages

▶NVDlinux/linux_kernel5.10 — 5.10.71+1
▶Debianlinux< 5.10.84-1+3
▶CVEListV5kernelFixed in kernel 5.15-rc1

Also affects: Linux Enterprise 15.0

Patches

Patch: bugzilla.suse.com ↗Patch: git.kernel.org ↗Patch: lkml.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-qfcc-9m6r-r23m: 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 li↗2022-08-25
▶
CVEList
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 li↗2022-08-24
▶
OSV
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 li↗2022-08-24
▶

📋Vendor Advisories

2
Red Hat
kernel: use-after-free in RDMA listen()↗2021-10-04
▶
Debian
CVE-2021-4028: linux - A flaw in the Linux kernel's implementation of RDMA communications manager liste...↗2021
▶