Input validation error in Linux kernel - CVE-2021-47336

Vulnerability identifier: #VU93675

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-2021-47336

CWE-ID: CWE-20

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 improper input validation within the smk_set_cipso() function in security/smack/smackfs.c. A local user can perform a denial of service (DoS) attack.

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

Install update from vendor's website.

Linux kernel - addressed in versions 4.9.276, 4.14.240, 4.19.198, 5.4.133, 5.10.51, 5.12.18, 5.13.3, 5.14
kernel - update to 4.19.90-2606.3.0.0376
bpftool - update to 4.19.90-2606.3.0.0376
bpftool-debuginfo - update to 4.19.90-2606.3.0.0376
kernel-debuginfo - update to 4.19.90-2606.3.0.0376
kernel-debugsource - update to 4.19.90-2606.3.0.0376
kernel-devel - update to 4.19.90-2606.3.0.0376
kernel-source - update to 4.19.90-2606.3.0.0376
kernel-tools - update to 4.19.90-2606.3.0.0376
kernel-tools-debuginfo - update to 4.19.90-2606.3.0.0376
kernel-tools-devel - update to 4.19.90-2606.3.0.0376
perf - update to 4.19.90-2606.3.0.0376
perf-debuginfo - update to 4.19.90-2606.3.0.0376
python2-perf - update to 4.19.90-2606.3.0.0376
python2-perf-debuginfo - update to 4.19.90-2606.3.0.0376
python3-perf - update to 4.19.90-2606.3.0.0376
python3-perf-debuginfo - update to 4.19.90-2606.3.0.0376

• https://git.kernel.org/stable/c/5f9880403e6b71d56924748ba331daf836243fca
• https://git.kernel.org/stable/c/5c2dca9a7a7ff6a2df34158903515e2e4fd3d2b2
• https://git.kernel.org/stable/c/cbd87ba6a13891acf6180783f8234a8b7a3e3d4d
• https://git.kernel.org/stable/c/135122f174c357b7a3e58f40fa5792156c5e93e6
• https://git.kernel.org/stable/c/3780348c1a0e14ffefcaf1fc521f815bcaac94b0
• https://git.kernel.org/stable/c/8f5c773a2871cf446e3f36b2834fb25bbb28512b
• https://git.kernel.org/stable/c/258fd821f69378453c071b9dd767b298810fc766
• https://git.kernel.org/stable/c/49ec114a6e62d8d320037ce71c1aaf9650b3cafd
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276
• 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

• Input validation error in Linux kernel smack
• openEuler 20.03 LTS SP4 update for kernel