CVE-2021-28971

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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 v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

March 22, 2021

Last Modified

November 21, 2024

References (14)

Vendor Advisories for CVE-2021-28971(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-oem-20.04b (5.10.0.1026.27) @ focal2026-05-26ubuntu
ubuntulinux-image-virtual-hwe-16.04-edge (4.15.0.144.140) @ xenial2026-05-26ubuntu
ubuntulinux-image-virtual-hwe-18.04-edge (5.4.0.74.77) @ focal2026-05-26ubuntu
ubuntulinux-image-virtual-hwe-20.04-edge (5.8.0.55.60) @ groovy2026-05-26ubuntu
redhatkernel-rt-0:4.18.0-348.rt7.130.el82021-11-09redhat
redhatkernel-0:4.18.0-348.el82021-11-09redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 5 ecosystems)
Debian:9(2)
PackageVulnerable rangeFixed inDependents
linux4.9.107-1 ... 4.9.88-1~bpo8+1 (66 versions)4.9.272-1—
linux-4.194.19.132-1~deb9u1 ... 4.19.181-1~deb9u1 (7 versions)4.19.194-1~deb9u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.26-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.26-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.26-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.10.26-1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-08-26 14:42 UTCEPSS rescore
  2. 2026-08-25 13:45 UTCEPSS rescore
  3. 2026-08-24 14:12 UTCEPSS rescore
  4. 2026-08-23 00:16 UTCEPSS rescore
  5. 2026-08-21 23:46 UTCEPSS rescore
  6. 2026-08-20 22:52 UTCEPSS rescore
  7. 2026-08-20 06:04 UTCOSV refresh
  8. 2026-08-19 17:01 UTCEPSS rescore
  9. 2026-08-18 13:45 UTCEPSS rescore
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  11. 2026-08-16 14:53 UTCEPSS rescore
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  21. 2026-08-06 13:43 UTCEPSS rescore
  22. 2026-08-05 19:14 UTCEPSS rescore
  23. 2026-08-05 01:11 UTCOSV refresh
  24. 2026-08-04 15:06 UTCEPSS rescore
  25. 2026-08-04 10:34 UTCEPSS rescore
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  1. 2026-08-03 10:33 UTCEPSS rescore
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  6. 2026-07-30 01:28 UTCEPSS rescore
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  8. 2026-07-28 15:33 UTCEPSS rescore
  9. 2026-07-26 14:52 UTCEPSS rescore
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  11. 2026-07-25 14:15 UTCEPSS rescore
  12. 2026-07-24 14:15 UTCEPSS rescore
  13. 2026-07-23 14:16 UTCEPSS rescore
  14. 2026-07-23 01:59 UTCEG score recompute
  15. 2026-07-22 22:46 UTCEG score recompute
  16. 2026-07-22 14:06 UTCEPSS rescore
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  18. 2026-07-21 15:22 UTCEPSS rescore
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  20. 2026-07-20 17:05 UTCEPSS rescore
  21. 2026-07-19 14:28 UTCEPSS rescore
  22. 2026-07-19 02:27 UTCEPSS rescore
  23. 2026-07-19 02:27 UTCEPSS rescore
  24. 2026-07-18 23:29 UTCOSV refresh
  25. 2026-07-18 10:02 UTCEPSS rescore
  26. 2026-07-18 10:02 UTCEPSS rescore
  27. 2026-07-16 17:00 UTCEPSS rescore
  28. 2026-07-15 16:55 UTCEPSS rescore
  29. 2026-07-15 16:55 UTCEPSS rescore
  30. 2026-07-15 01:58 UTCEPSS rescore
  31. 2026-07-13 22:27 UTCEPSS rescore
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  36. 2026-07-11 08:25 UTCEPSS rescore
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  38. 2026-07-09 19:07 UTCEPSS rescore
  39. 2026-07-08 15:12 UTCEPSS rescore
  40. 2026-07-07 13:43 UTCEPSS rescore
  41. 2026-07-06 16:25 UTCEPSS rescore
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  43. 2026-07-06 02:21 UTCEPSS rescore
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  45. 2026-07-05 02:28 UTCEPSS rescore
  46. 2026-07-04 06:29 UTCEPSS rescore
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  48. 2026-07-02 16:57 UTCEPSS rescore
  49. 2026-07-01 15:03 UTCEPSS rescore
  50. 2026-07-01 06:48 UTCOSV refresh
  51. 2026-06-30 23:20 UTCEPSS rescore
  52. 2026-06-30 23:20 UTCEPSS rescore
  53. 2026-06-28 14:05 UTCEPSS rescore
  54. 2026-06-28 04:54 UTCEPSS rescore
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  56. 2026-06-27 03:06 UTCEPSS rescore
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  58. 2026-06-25 13:48 UTCEPSS rescore
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  60. 2026-06-24 14:03 UTCEPSS rescore
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  62. 2026-06-23 21:31 UTCEPSS rescore
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  66. 2026-06-21 14:55 UTCEPSS rescore
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  68. 2026-06-21 01:58 UTCEPSS rescore
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  70. 2026-06-19 19:24 UTCEPSS rescore
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  72. 2026-06-18 17:51 UTCEPSS rescore
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  74. 2026-06-17 17:51 UTCEPSS rescore
  75. 2026-06-16 17:51 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2021-28971?
CVE-2021-28971 is a medium vulnerability published on March 22, 2021. In intelpmudrainpebsnhm 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.
When was CVE-2021-28971 disclosed?
CVE-2021-28971 was first published in the National Vulnerability Database on March 22, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-28971 actively exploited?
CVE-2021-28971 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.6% of all scored CVEs.
What is the CVSS score of CVE-2021-28971?
CVE-2021-28971 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2021-28971?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-28971, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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