CVE-2021-47241

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2024-05-21. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

ethtool: strset: fix message length calculation

Outer nest for ETHTOOL_A_STRSET_STRINGSETS is not accounted for. This may result in ETHTOOL_MSG_STRSET_GET producing a warning like:

calculated message payload length (684) not sufficient WARNING: CPU: 0 PID: 30967 at net/ethtool/netlink.c:369 ethnl_default_doit+0x87a/0xa20

and a splat.

As usually with such warnings three conditions must be met for the warning to trigger:

  • there must be no skb size rounding up (e.g. reply_size of 684);
  • string set must be per-device (so that the header gets populated);
  • the device name must be at least 12 characters long.

all in all with current user space it looks like reading priv flags is the only place this could potentially happen. Or with syzbot :)

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
59.8%
KEV
Not listed

Published

May 21, 2024

Last Modified

April 4, 2025

References (6)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 46× 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.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-20 17:05 UTCEPSS rescore
  5. 2026-07-19 14:29 UTCEPSS rescore
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  11. 2026-07-15 16:55 UTCEPSS rescore
  12. 2026-07-15 01:58 UTCEPSS rescore
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  14. 2026-07-14 10:10 UTCOSV refresh
  15. 2026-07-13 22:27 UTCEPSS rescore
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  1. 2026-07-06 16:25 UTCEPSS rescore
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  8. 2026-07-01 15:04 UTCEPSS rescore
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  13. 2026-06-27 03:07 UTCEPSS rescore
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  15. 2026-06-26 10:39 UTCOSV refresh
  16. 2026-06-25 13:48 UTCEPSS rescore
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  18. 2026-06-24 14:03 UTCEPSS rescore
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  20. 2026-06-23 21:31 UTCEPSS rescore
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  22. 2026-06-22 14:24 UTCEPSS rescore
  23. 2026-06-21 14:55 UTCEPSS rescore
  24. 2026-06-21 01:58 UTCEPSS rescore
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  26. 2026-06-19 19:24 UTCEPSS rescore
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  40. 2026-06-10 22:16 UTCEPSS rescore
  41. 2026-06-10 13:20 UTCEPSS rescore
  42. 2026-06-08 17:11 UTCOSV refresh
  43. 2026-06-08 14:15 UTCEPSS rescore
  44. 2026-06-08 14:15 UTCEPSS rescore
  45. 2026-06-08 14:15 UTCEPSS rescore
  46. 2026-06-07 15:23 UTCEPSS rescore
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  48. 2026-06-06 13:46 UTCEPSS rescore
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  50. 2026-06-05 22:45 UTCEPSS rescore
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  63. 2026-05-29 13:42 UTCEPSS rescore
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  66. 2026-05-27 13:39 UTCEPSS rescore
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  68. 2026-05-26 13:43 UTCEPSS rescore
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  70. 2026-05-26 07:17 UTCEPSS rescore
  71. 2026-05-26 07:17 UTCEPSS rescore
  72. 2026-05-24 01:38 UTCEG score recompute
  73. 2026-05-24 01:38 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2021-47241?
CVE-2021-47241 is a high vulnerability published on May 21, 2024. In the Linux kernel, the following vulnerability has been resolved: ethtool: strset: fix message length calculation Outer nest for ETHTOOLASTRSET_STRINGSETS is not accounted for. This may result in ETHTOOLMSGSTRSET_GET producing a warning like: calculated message payload length (684) not sufficient…
When was CVE-2021-47241 disclosed?
CVE-2021-47241 was first published in the National Vulnerability Database on May 21, 2024, with the most recent update on April 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47241 actively exploited?
CVE-2021-47241 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-47241?
CVE-2021-47241 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2021-47241?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47241, 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.

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