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Vulnerability record · CVE-2021-28971 · published 22 March 2021

CVE-2021-28971: Linux kernel vulnerability

Linux · Linux Kernel

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.

5.5 CVSS 3.1 Medium EPSS 0.39% · top 69.5% CWE-755 · CWE-755
5.5CVSS 3.1 base score, v2 4.9
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

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.

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

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d88d05a9e0b6d9356e97129d4ff9942d765f46ea Mailing ListPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5Y
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUA
https://security.netapp.com/advisory/ntap-20210430-0003/ Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d88d05a9e0b6d9356e97129d4ff9942d765f46ea Mailing ListPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4VCKIOXCOZGXBEZMO5LGGV5
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PTRNPQTZ4GVS46SZ4OBXY5Y
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUA
https://security.netapp.com/advisory/ntap-20210430-0003/ Third Party Advisory

Track CVE-2021-28971 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Source: NIST National Vulnerability Database (record CVE-2021-28971), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.