A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2941-1 linux-4.19 security update
Debian DSA Debian DSA DSA-5096-1 linux security update
EUVD EUVD EUVD-2021-34061 A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.
Ubuntu USN Ubuntu USN USN-6001-1 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-6013-1 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-6014-1 Linux kernel vulnerabilities
Fixes

Solution

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-03T17:16:04.262Z

Reserved: 2022-01-10T00:00:00

Link: CVE-2021-4203

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-03-25T19:15:09.833

Modified: 2024-11-21T06:37:08.430

Link: CVE-2021-4203

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-09-29T00:00:00Z

Links: CVE-2021-4203 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses