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UBUNTU-CVE-2021-41864

Dashboard / Vulnerabilities / UBUNTU-CVE-2021-41864

UBUNTU-CVE-2021-41864

Published: 2 Oct 2021Last Modified: 9 Sept 2026

Upstream:

Aliases:

Summary:

Details: prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.

References: https://ubuntu.com/security/CVE-2021-41864, https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=30e29a9a2bc6a4888335a6ede968b75cd329657a, https://github.com/torvalds/linux/commit/30e29a9a2bc6a4888335a6ede968b75cd329657a, https://ubuntu.com/security/notices/USN-5139-1, https://ubuntu.com/security/notices/USN-5140-1, https://ubuntu.com/security/notices/USN-5208-1, https://ubuntu.com/security/notices/USN-5209-1, https://ubuntu.com/security/notices/USN-5210-1, https://ubuntu.com/security/notices/USN-5218-1, https://www.cve.org/CVERecord?id=CVE-2021-41864

Affected packages

Package

Name: linux-azure

Purl: pkg:deb/ubuntu/linux-azure?arch=source&distro=trusty%2Fesm

Affected ranges

Type: ECOSYSTEM

Events:

Introduced- 0

Fixed -4.15.0-1129.142~14.04.1

Affected versions

4.15.0-1023.24~14.04.1

4.15.0-1030.31~14.04.1

4.15.0-1031.32~14.04.1

4.15.0-1032.33~14.04.2

4.15.0-1035.36~14.04.2

4.15.0-1036.38~14.04.2

4.15.0-1037.39~14.04.2

4.15.0-1039.41~14.04.2

4.15.0-1040.44~14.04.1

4.15.0-1041.45~14.04.1

4.15.0-1042.46~14.04.1

4.15.0-1045.49~14.04.1

4.15.0-1046.50~14.04.1

4.15.0-1047.51~14.04.1

4.15.0-1049.54~14.04.1

4.15.0-1050.55~14.04.1

4.15.0-1051.56~14.04.1

4.15.0-1052.57~14.04.1

4.15.0-1055.60~14.04.1

4.15.0-1056.61~14.04.1

4.15.0-1057.62~14.04.1

4.15.0-1059.64~14.04.1

4.15.0-1060.65~14.04.1

4.15.0-1061.66~14.04.1

4.15.0-1063.68~14.04.1

4.15.0-1064.69~14.04.1

4.15.0-1066.71~14.04.1

4.15.0-1067.72~14.04.1

4.15.0-1069.74~14.04.1

4.15.0-1071.76~14.04.1

4.15.0-1074.79~14.04.1

4.15.0-1077.82~14.04.1

4.15.0-1082.92~14.04.1

4.15.0-1083.93~14.04.1

4.15.0-1089.99~14.04.1

4.15.0-1091.101~14.04.1

4.15.0-1092.102~14.04.1

4.15.0-1093.103~14.04.1

4.15.0-1095.105~14.04.1

4.15.0-1096.106~14.04.1

4.15.0-1098.109~14.04.1

4.15.0-1100.111~14.04.1

4.15.0-1102.113~14.04.1

4.15.0-1103.114~14.04.1

4.15.0-1106.118~14.04.1

4.15.0-1108.120~14.04.1

4.15.0-1109.121~14.04.1

4.15.0-1110.122~14.04.1

4.15.0-1111.123~14.04.1

4.15.0-1112.124~14.04.1

4.15.0-1113.126~14.04.1

4.15.0-1114.127~14.04.1

4.15.0-1115.128~14.04.1

4.15.0-1118.131~14.04.1

4.15.0-1121.134~14.04.1

4.15.0-1122.135~14.04.1

4.15.0-1123.136~14.04.1

4.15.0-1124.137~14.04.1

4.15.0-1125.138~14.04.1

4.15.0-1126.139~14.04.1

4.15.0-1127.140~14.04.1

Common Vulnerability Scoring System

Attack Vector

Network

Adjacent

Local

Physical

Privileges Required

None

Low

High

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality

None

Low

High

Integrity

None

Low

High

Availability

None

Low

High