CVE-2021-4203

kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses

Published Mar 25, 2022 CVSS 3.1 · 6.8 Medium EPSS 1.7% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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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
History

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