Memory leak in Linux kernel - CVE-2021-47543

Vulnerability identifier: #VU89929

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2021-47543

CWE-ID: CWE-401

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 memory leak within the fetch_kernel_version() function in tools/perf/util/util.c, within the report__browse_hists() function in tools/perf/builtin-report.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
openEuler
kernel
python2-perf
kernel-tools
bpftool
kernel-devel
kernel-tools-devel
perf
kernel-debugsource
kernel-source
bpftool-debuginfo
kernel-debuginfo
python3-perf-debuginfo
kernel-tools-debuginfo
python3-perf
python2-perf-debuginfo
perf-debuginfo

Install update from vendor's website.

Linux kernel - addressed in versions 5.4.164, 5.10.84, 5.15.7, 5.16
kernel - update to 4.19.90-2406.2.0.0281
python2-perf - update to 4.19.90-2406.2.0.0281
kernel-tools - update to 4.19.90-2406.2.0.0281
bpftool - update to 4.19.90-2406.2.0.0281
kernel-devel - update to 4.19.90-2406.2.0.0281
kernel-tools-devel - update to 4.19.90-2406.2.0.0281
perf - update to 4.19.90-2406.2.0.0281
kernel-debugsource - update to 4.19.90-2406.2.0.0281
kernel-source - update to 4.19.90-2406.2.0.0281
bpftool-debuginfo - update to 4.19.90-2406.2.0.0281
kernel-debuginfo - update to 4.19.90-2406.2.0.0281
python3-perf-debuginfo - update to 4.19.90-2406.2.0.0281
kernel-tools-debuginfo - update to 4.19.90-2406.2.0.0281
python3-perf - update to 4.19.90-2406.2.0.0281
python2-perf-debuginfo - update to 4.19.90-2406.2.0.0281
perf-debuginfo - update to 4.19.90-2406.2.0.0281

• https://git.kernel.org/stable/c/df5990db088d4c7fea9a2f9b8195a7859e1768c4
• https://git.kernel.org/stable/c/ff061b5bda73c4f785b4703eeb0848fd99e5608a
• https://git.kernel.org/stable/c/71e284dcebecb9fd204ff11097469cc547723ad1
• https://git.kernel.org/stable/c/d9fc706108c15f8bc2d4ccccf8e50f74830fabd9
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.84
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.7
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.164

• Memory leak in Linux kernel perf
• openEuler 20.03 LTS SP4 update for kernel