CVE-2026-43205

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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

dpaa2-switch: validate num_ifs to prevent out-of-bounds write

The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes() but never validates it against DPSW_MAX_IF (64). This value controls iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports num_ifs >= 64, the loop can write past the array bounds.

Add a bound check for num_ifs in dpaa2_switch_init().

dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all ports match the flood filter, the loop fills all 64 slots and the control interface write overflows by one entry.

The check uses >= because num_ifs == DPSW_MAX_IF is also functionally broken.

build_if_id_bitmap() silently drops any ID >= 64: if (id[i] < DPSW_MAX_IF) bmap[id[i] / 64] |= ...

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
3.7%
KEV
Not listed

Published

May 6, 2026

Last Modified

May 11, 2026

Advisory Details (7)

Auto-updated May 11, 2026
No patch confirmed yet.
generic

dpaa2-switch: validate num_ifs to prevent out-of-bounds write - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c18493f750208eb4ff1198fc5a02786b8b2d70a6
generic

dpaa2-switch: validate num_ifs to prevent out-of-bounds write - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b690635d4719214892855b79ce018d4b1672ac96
generic

dpaa2-switch: validate num_ifs to prevent out-of-bounds write - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a3034a8d56174dd6464c46823438f25797910a8d
generic

dpaa2-switch: validate num_ifs to prevent out-of-bounds write - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a26dda3bae469c8e4e1b1993ad33dafa32d0fc28
generic

dpaa2-switch: validate num_ifs to prevent out-of-bounds write - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8b841fd529db9faf8bc678d429d4bf4e98b10900
generic

dpaa2-switch: validate num_ifs to prevent out-of-bounds write - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8a5752c6dcc085a3bfc78589925182e4e98468c5
generic

dpaa2-switch: validate num_ifs to prevent out-of-bounds write - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/89764cf44544e943230f5e03b8c40a90da26537c

Vendor Advisories for CVE-2026-43205(1)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:6.12.0-211.18.1.el10_22026-05-28redhat
linuxKernel @ 5.15.202—osv

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.

Weakness Classification(1)

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

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2026-43205?
CVE-2026-43205 is a high vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: validate num_ifs to prevent out-of-bounds write The driver obtains swattr.numifs from firmware via dpswgetattributes() but never validates it against DPSWMAXIF (64). This value controls iteration in…
When was CVE-2026-43205 disclosed?
CVE-2026-43205 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on May 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43205 actively exploited?
CVE-2026-43205 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43205?
CVE-2026-43205 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43205?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43205, 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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