← Vulnerability feed

Vulnerability record · CVE-2021-3744 · published 4 March 2022

CVE-2021-3744: Linux kernel memory leak vulnerability

Linux · Linux Kernel

A memory leak flaw was found in the Linux kernel in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c, which allows attackers to cause a denial of service (memory consumption). This vulnerability is similar with the older CVE-2019-18808.

5.5 CVSS 3.1 Medium EPSS 0.53% · top 57.3% CWE-401 · Memory leak
5.5CVSS 3.1 base score, v2 2.1
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
23Affected product versions listed by NVD
22References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

A memory leak flaw was found in the Linux kernel in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c, which allows attackers to cause a denial of service (memory consumption). This vulnerability is similar with the older CVE-2019-18808.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

23 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/09/14/1 ExploitMailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2000627 Issue TrackingThird Party Advisory
https://github.com/torvalds/linux/commit/505d9dcb0f7ddf9d075e729523a33d38642ae680 PatchThird Party Advisory
https://kernel.googlesource.com/pub/scm/linux/kernel/git/herbert/crypto-2.6/+/505d9dcb0f7ddf9d075e729523a33d38642ae680%5 Mailing ListPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7BLLVKYAIETEORUPTFO3TR3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAT3RERO6QBKSPJBNNRWY3D
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYKURLXBB2555ASWMPDNMBU
https://seclists.org/oss-sec/2021/q3/164 ExploitMailing ListPatchThird Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html PatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/14/1 ExploitMailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2000627 Issue TrackingThird Party Advisory
https://github.com/torvalds/linux/commit/505d9dcb0f7ddf9d075e729523a33d38642ae680 PatchThird Party Advisory
https://kernel.googlesource.com/pub/scm/linux/kernel/git/herbert/crypto-2.6/+/505d9dcb0f7ddf9d075e729523a33d38642ae680%5 Mailing ListPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7BLLVKYAIETEORUPTFO3TR3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAT3RERO6QBKSPJBNNRWY3D
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYKURLXBB2555ASWMPDNMBU
https://seclists.org/oss-sec/2021/q3/164 ExploitMailing ListPatchThird Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html PatchThird Party Advisory

Track CVE-2021-3744 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-32433Erlang/OTP SSH server missing authentication allows remote code executionErlang/OTP SSH servers before OTP-27.3.3, OTP-26.2.5.11 and OTP-25.3.2.20 mishandle SSH protocol messages, letting an unauthenticated attacker execut…KEVEPSS 99%analysed10.0CVE-2025-24201Apple WebKit out-of-bounds write allows sandbox escapeCVE-2025-24201 is an out-of-bounds write in Apple's WebKit that was addressed with improved checks. Maliciously crafted web content may break out of …KEVEPSS 3.8%analysed10.0CVE-2022-22947Spring Cloud Gateway Actuator endpoint code injectionSpring Cloud Gateway versions before 3.1.1+ and 3.0.7+ allow code injection when the Gateway Actuator endpoint is enabled, exposed and unsecured. A c…KEVEPSS 98%analysed10.0CVE-2021-44228Apache Log4j2 JNDI lookup remote code executionApache Log4j2 versions 2.0-beta9 through 2.15.0 (excluding 2.12.2, 2.12.3, and 2.3.1) do not protect against attacker-controlled LDAP and other JNDI …KEVEPSS 100%analysed9.8CVE-2026-24061GNU Inetutils telnetd argument injection allows remote auth bypasstelnetd in GNU Inetutils through 2.7 fails to sanitize the USER environment variable, so a value such as "-f root" is passed as an argument to login …KEVEPSS 99%analysed9.8CVE-2025-39682Linux kernel TLS zero-length record handling flaw on rx_listThe Linux kernel TLS receive path mishandles zero-length records that arrive from the rx_list, breaking the assumption that a record type change cann…KEVEPSS 2.9%analysed9.8CVE-2025-24813Apache Tomcat Default Servlet path equivalence enables RCE and file disclosureApache Tomcat mishandles path equivalence for names containing an internal dot, letting a remote unauthenticated attacker write files through the Def…KEVEPSS 100%analysed9.8CVE-2024-9680Mozilla Firefox and Thunderbird use-after-free in Animation timelinesA use-after-free flaw in Animation timelines allows an attacker to execute code in the content process of Firefox and Thunderbird. Mozilla reports ex…KEVEPSS 23%analysed

Source: NIST National Vulnerability Database (record CVE-2021-3744), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.