Deadlock in Linux kernel - CVE-2021-46989

Vulnerability identifier: #VU89261

CSH Severity: Low

CVSS v4 BT: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-46989

CWE-ID: CWE-833

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to deadlock within the inhfsplus_file_truncate() function in fs/hfsplus/extents.c. A local user can crash the system.

Linux kernel
openEuler
bpftool
kernel
kernel-devel
perf-debuginfo
perf
python2-perf
kernel-source
python3-perf-debuginfo
python3-perf
kernel-tools-debuginfo
kernel-tools
kernel-tools-devel
python2-perf-debuginfo
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
EMC Cloud Tiering Appliance

Install updates from vendor's website.

Linux kernel - addressed in versions 4.19.191, 5.4.120, 5.10.38, 5.11.22, 5.12.5, 5.13
bpftool - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-devel - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
perf-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
perf - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python2-perf - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-source - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python3-perf-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python3-perf - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-tools-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-tools - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-tools-devel - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python2-perf-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-debugsource - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
bpftool-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
EMC Cloud Tiering Appliance - update to 13.2.0.2.29

• https://git.kernel.org/stable/c/52dde855663e5db824af51db39b5757d2ef3e28a
• https://git.kernel.org/stable/c/c451a6bafb5f422197d31536f82116aed132b72c
• https://git.kernel.org/stable/c/adbd8a2a8cc05d9e501f93e5c95c59307874cc99
• https://git.kernel.org/stable/c/c477f62db1a0c0ecaa60a29713006ceeeb04b685
• https://git.kernel.org/stable/c/97314e45aa1223a42d60256a62c5d9af54baf446
• https://git.kernel.org/stable/c/c3187cf32216313fb316084efac4dab3a8459b1d
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.191
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.120

• Denial of service in Linux kernel hfsplus
• openEuler 20.03 LTS SP1 update for kernel
• openEuler 20.03 LTS SP4 update for kernel
• Multiple vulnerabilities in Dell Cloud Tiering Appliance