CVE-2021-28971

MEDIUM

Linux Kernel < 5.11.8 - Improper Exception Handling

Title source: rule

Description

In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS status in a PEBS record is mishandled, aka CID-d88d05a9e0b6.

References (7)

[Mailing List, Patch, Vendor Advisory] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d88d05a9e0b6d9356e97129d4ff9942d765f46ea

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20210430-0003/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5MWCHO6FT3/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5YDOGVPSTGQ/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/

Scores

CVSS v3 5.5

EPSS 0.0004

EPSS Percentile 10.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Classification

CWE

CWE-755

Status published

Affected Products (9)

linux/linux_kernel < 5.11.8

fedoraproject/fedora

fedoraproject/fedora

fedoraproject/fedora

debian/debian_linux

netapp/cloud_backup

netapp/solidfire_baseboard_management_controller_firmware

netapp/aff_a250_firmware

netapp/aff_500f_firmware

Timeline

Published Mar 22, 2021

Tracked Since Feb 18, 2026