Out-of-bounds read in Linux kernel - CVE-2021-47346

Vulnerability identifier: #VU90301

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-2021-47346

CWE-ID: CWE-125

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 an out-of-bounds read error within the tmc_update_etf_buffer() function in drivers/hwtracing/coresight/coresight-tmc-etf.c. A local user can perform a denial of service (DoS) attack.

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

Install update from vendor's website.

Linux kernel - addressed in versions 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3, 5.14
kernel - update to 4.19.90-2406.4.0.0283
perf-debuginfo - update to 4.19.90-2406.4.0.0283
kernel-debugsource - update to 4.19.90-2406.4.0.0283
python2-perf-debuginfo - update to 4.19.90-2406.4.0.0283
bpftool - update to 4.19.90-2406.4.0.0283
kernel-tools-debuginfo - update to 4.19.90-2406.4.0.0283
kernel-source - update to 4.19.90-2406.4.0.0283
kernel-debuginfo - update to 4.19.90-2406.4.0.0283
python2-perf - update to 4.19.90-2406.4.0.0283
perf - update to 4.19.90-2406.4.0.0283
python3-perf-debuginfo - update to 4.19.90-2406.4.0.0283
kernel-tools-devel - update to 4.19.90-2406.4.0.0283
kernel-tools - update to 4.19.90-2406.4.0.0283
bpftool-debuginfo - update to 4.19.90-2406.4.0.0283
python3-perf - update to 4.19.90-2406.4.0.0283
kernel-devel - update to 4.19.90-2406.4.0.0283

• https://git.kernel.org/stable/c/04bd77ef4f4d9fc6102023b85f4590fc2130aac5
• https://git.kernel.org/stable/c/ef0a06acc6b16388640ad367eedfa2a17f1945db
• https://git.kernel.org/stable/c/35c1c4bd2d59ad734129d4e232af9d1098023918
• https://git.kernel.org/stable/c/733d4d95c0101d5f277b8e4910411d016e49a9dc
• https://git.kernel.org/stable/c/0115687be7b13993066aef602253a53d55f5b11f
• https://git.kernel.org/stable/c/5fae8a946ac2df879caf3f79a193d4766d00239b
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.51
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.18
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.133

• Out-of-bounds read in Linux kernel hwtracing coresight driver
• openEuler 20.03 LTS SP4 update for kernel