CVE-2021-38200 — NULL Pointer Dereference in Kernel

CWE-476 — NULL Pointer Dereference9 documents8 sources
Severity
5.5MEDIUMNVD
OSV6.5
EPSS
0.0%
top 87.22%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Linux KernelDebian LinuxMsrc Cbl2 Kernel 5.10.78.1-1 ON CBL Mariner 2.0+1 more
Timeline
PublishedAug 8
Latest updateMay 24

Description

arch/powerpc/perf/core-book3s.c in the Linux kernel before 5.12.13, on systems with perf_event_paranoid=-1 and no specific PMU driver support registered, allows local users to cause a denial of service (perf_instruction_pointer NULL pointer dereference and OOPS) via a "perf record" command.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶NVDlinux/linux_kernel< 5.12.13
▶debiandebian/linux

Patches

Patch: cdn.kernel.org ↗Patch: github.com ↗Patch: cdn.kernel.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-hvvv-j3j9-xhr9: arch/powerpc/perf/core-book3s↗2022-05-24
▶
OSV
linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities↗2021-09-08
▶
OSV
CVE-2021-38200: arch/powerpc/perf/core-book3s↗2021-08-08
▶

📋Vendor Advisories

4
Ubuntu
Linux kernel vulnerabilities↗2021-09-08
▶
Microsoft
arch/powerpc/perf/core-book3s.c in the Linux kernel before 5.12.13 on systems with perf_event_paranoid=-1 and no specific PMU driver support registered allows local users to cause a denial of service ↗2021-08-10
▶
Red Hat
kernel: arch/powerpc/perf/core-book3s.c allows local users to cause a DoS via a perf record command↗2021-06-18
▶
Debian
CVE-2021-38200: linux - arch/powerpc/perf/core-book3s.c in the Linux kernel before 5.12.13, on systems w...↗2021
▶
CVE-2021-38200 — NULL Pointer Dereference in Kernel | cvebase