CVE-2021-47485

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-05-22. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields

Overflowing either addrlimit or bytes_togo can allow userspace to trigger a buffer overflow of kernel memory. Check for overflows in all the places doing math on user controlled buffers.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

May 22, 2024

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f8cdfff06829a0b0348b6debc29ff6a61967724
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0d4395477741608d123dad51def9fe50b7ebe952
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d39bf40e55e666b5905fdbd46a0dced030ce87be
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c3e17e58f571f34c51aeb17274ed02c2ed5cf780
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bda41654b6e0c125a624ca35d6d20beb8015b5d0
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/73d2892148aa4397a885b4f4afcfc5b27a325c42
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/60833707b968d5ae02a75edb7886dcd4a957cf0d
generic

IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3f57c3f67fd93b4da86aeffea1ca32c484d054ad

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-lts-xenial (4.4.0.277.283) @ xenial2026-05-24ubuntu
ubuntulinux-tools-fips (4.4.0.1121.122) @ xenial2026-05-24ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.46-4, 5.10.46-5, 5.10.70-1, 5.10.70-1~bpo10+15.10.84-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.15.3-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.15.3-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.15.3-1—

Weakness Classification(1)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 26× 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 165 total refreshes for this CVE.

  1. 2026-09-20 20:13 UTCEPSS rescore
  2. 2026-09-19 15:38 UTCEPSS rescore
  3. 2026-09-18 19:24 UTCEPSS rescore
  4. 2026-09-17 19:23 UTCEPSS rescore
  5. 2026-09-16 14:05 UTCEPSS rescore
  6. 2026-09-16 14:05 UTCEPSS rescore
  7. 2026-09-15 03:06 UTCEPSS rescore
  8. 2026-09-12 14:57 UTCEPSS rescore
  9. 2026-09-11 14:49 UTCEPSS rescore
  10. 2026-09-11 09:33 UTCEPSS rescore
  11. 2026-09-08 21:57 UTCEPSS rescore
  12. 2026-09-07 15:58 UTCEPSS rescore
  13. 2026-09-07 05:18 UTCOSV refresh
  14. 2026-09-06 13:45 UTCEPSS rescore
  15. 2026-09-05 15:25 UTCEPSS rescore
  16. 2026-09-04 13:57 UTCEPSS rescore
  17. 2026-09-04 05:03 UTCEPSS rescore
  18. 2026-09-02 14:09 UTCEPSS rescore
  19. 2026-09-01 13:51 UTCEPSS rescore
  20. 2026-08-30 19:14 UTCEPSS rescore
  21. 2026-08-30 01:19 UTCEPSS rescore
  22. 2026-08-28 21:38 UTCEPSS rescore
  23. 2026-08-27 14:22 UTCEPSS rescore
  24. 2026-08-26 14:43 UTCEPSS rescore
  25. 2026-08-25 13:46 UTCEPSS rescore
Show 75 more
  1. 2026-08-24 14:13 UTCEPSS rescore
  2. 2026-08-21 23:46 UTCEPSS rescore
  3. 2026-08-20 22:52 UTCEPSS rescore
  4. 2026-08-20 15:01 UTCOSV refresh
  5. 2026-08-19 17:01 UTCEPSS rescore
  6. 2026-08-18 13:45 UTCEPSS rescore
  7. 2026-08-17 13:44 UTCEPSS rescore
  8. 2026-08-16 14:53 UTCEPSS rescore
  9. 2026-08-16 02:11 UTCEPSS rescore
  10. 2026-08-15 01:27 UTCEPSS rescore
  11. 2026-08-12 13:48 UTCEPSS rescore
  12. 2026-08-11 13:38 UTCEPSS rescore
  13. 2026-08-09 13:44 UTCEPSS rescore
  14. 2026-08-08 16:34 UTCEPSS rescore
  15. 2026-08-07 16:24 UTCEPSS rescore
  16. 2026-08-06 13:44 UTCEPSS rescore
  17. 2026-08-05 19:15 UTCEPSS rescore
  18. 2026-08-05 09:40 UTCEG score recompute
  19. 2026-08-05 09:40 UTCGHSA enrichment
  20. 2026-08-04 15:06 UTCEPSS rescore
  21. 2026-08-04 12:10 UTCEG score recompute
  22. 2026-08-04 12:10 UTCGHSA enrichment
  23. 2026-08-04 10:34 UTCEPSS rescore
  24. 2026-08-04 09:49 UTCEG score recompute
  25. 2026-08-04 09:49 UTCVendor advisory
  26. 2026-08-04 09:49 UTCGHSA enrichment
  27. 2026-08-02 02:24 UTCEPSS rescore
  28. 2026-08-01 04:13 UTCEPSS rescore
  29. 2026-08-01 01:42 UTCOSV refresh
  30. 2026-07-30 16:25 UTCEPSS rescore
  31. 2026-07-30 01:28 UTCEPSS rescore
  32. 2026-07-28 15:33 UTCEPSS rescore
  33. 2026-07-26 14:52 UTCEPSS rescore
  34. 2026-07-25 14:15 UTCEPSS rescore
  35. 2026-07-24 14:15 UTCEPSS rescore
  36. 2026-07-24 14:15 UTCEPSS rescore
  37. 2026-07-23 14:16 UTCEPSS rescore
  38. 2026-07-23 02:06 UTCEG score recompute
  39. 2026-07-22 22:53 UTCEG score recompute
  40. 2026-07-22 14:06 UTCEPSS rescore
  41. 2026-07-21 15:22 UTCEPSS rescore
  42. 2026-07-21 15:22 UTCEPSS rescore
  43. 2026-07-20 17:05 UTCEPSS rescore
  44. 2026-07-19 14:29 UTCEPSS rescore
  45. 2026-07-19 02:27 UTCEPSS rescore
  46. 2026-07-19 02:27 UTCEPSS rescore
  47. 2026-07-18 10:02 UTCEPSS rescore
  48. 2026-07-16 17:00 UTCEPSS rescore
  49. 2026-07-16 17:00 UTCEPSS rescore
  50. 2026-07-15 16:55 UTCEPSS rescore
  51. 2026-07-15 01:58 UTCEPSS rescore
  52. 2026-07-15 01:58 UTCEPSS rescore
  53. 2026-07-14 09:10 UTCOSV refresh
  54. 2026-07-13 22:27 UTCEPSS rescore
  55. 2026-07-13 06:11 UTCEPSS rescore
  56. 2026-07-13 06:11 UTCEPSS rescore
  57. 2026-07-12 05:44 UTCEPSS rescore
  58. 2026-07-11 08:25 UTCEPSS rescore
  59. 2026-07-09 19:07 UTCEPSS rescore
  60. 2026-07-09 19:07 UTCEPSS rescore
  61. 2026-07-08 15:12 UTCEPSS rescore
  62. 2026-07-08 15:12 UTCEPSS rescore
  63. 2026-07-07 13:43 UTCEPSS rescore
  64. 2026-07-06 16:25 UTCEPSS rescore
  65. 2026-07-06 16:25 UTCEPSS rescore
  66. 2026-07-06 02:21 UTCEPSS rescore
  67. 2026-07-06 02:21 UTCEPSS rescore
  68. 2026-07-05 02:28 UTCEPSS rescore
  69. 2026-07-05 02:28 UTCEPSS rescore
  70. 2026-07-04 06:29 UTCEPSS rescore
  71. 2026-07-04 06:29 UTCEPSS rescore
  72. 2026-07-01 15:04 UTCEPSS rescore
  73. 2026-06-30 23:20 UTCEPSS rescore
  74. 2026-06-29 14:04 UTCEPSS rescore
  75. 2026-06-29 14:04 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2021-47485?
CVE-2021-47485 is a high vulnerability published on May 22, 2024. In the Linux kernel, the following vulnerability has been resolved: IB/qib: Protect from buffer overflow in struct qibusersdma_pkt fields Overflowing either addrlimit or bytes_togo can allow userspace to trigger a buffer overflow of kernel memory. Check for overflows in all the places doing math on…
When was CVE-2021-47485 disclosed?
CVE-2021-47485 was first published in the National Vulnerability Database on May 22, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47485 actively exploited?
CVE-2021-47485 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 85.0% of all scored CVEs.
What is the CVSS score of CVE-2021-47485?
CVE-2021-47485 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2021-47485?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47485, 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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