CVE-2026-43445

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-08. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: 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:

e1000/e1000e: Fix leak in DMA error cleanup

If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb.

Because count is incremented after a successful mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping would leak.

In these commits, a faulty while condition caused an infinite loop in dma_error: Commit 03b1320dfcee ("e1000e: remove use of skb_dma_map from e1000e driver") Commit 602c0554d7b0 ("e1000: remove use of skb_dma_map from e1000 driver")

Commit c1fa347f20f1 ("e1000/e1000e/igb/igbvf/ixgb/ixgbe: Fix tests of unsigned in *_tx_map()") fixed the infinite loop, but introduced the off-by-one error.

This issue may still exist in the igbvf driver, but I did not address it in this patch.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
2.4%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 21, 2026

Advisory Details (8)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fa5ba9867a55e640df0dc79bf0199770fb043f03
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/519051c711dfd239ef6e4b28878efee400a035f9
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0a1fc25deabab4efce64610e3c449485c4fa8f5f
generic

e1000/e1000e: Fix leak in DMA error cleanup - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0606c24a745bafd1be5d66c48361638cd9cad74b

Vendor Advisories for CVE-2026-43445(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 42× 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 105 total refreshes for this CVE.

  1. 2026-07-13 06:13 UTCEPSS rescore
  2. 2026-07-12 05:46 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-09 19:10 UTCEPSS rescore
  5. 2026-07-08 15:16 UTCEPSS rescore
  6. 2026-07-07 13:46 UTCEPSS rescore
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-01 15:07 UTCEPSS rescore
  12. 2026-06-30 23:22 UTCEPSS rescore
  13. 2026-06-29 14:06 UTCEPSS rescore
  14. 2026-06-28 14:07 UTCEPSS rescore
  15. 2026-06-28 04:56 UTCEPSS rescore
  16. 2026-06-28 04:50 UTCEG score recompute
  17. 2026-06-28 04:50 UTCGHSA enrichment
  18. 2026-06-27 03:08 UTCEPSS rescore
  19. 2026-06-26 21:21 UTCEG score recompute
  20. 2026-06-26 21:21 UTCGHSA enrichment
  21. 2026-06-25 13:49 UTCEPSS rescore
  22. 2026-06-25 13:49 UTCEPSS rescore
  23. 2026-06-24 14:05 UTCEPSS rescore
  24. 2026-06-23 21:33 UTCEPSS rescore
  25. 2026-06-22 14:25 UTCEPSS rescore
Show 75 more
  1. 2026-06-22 14:25 UTCEPSS rescore
  2. 2026-06-21 14:56 UTCEPSS rescore
  3. 2026-06-21 14:56 UTCEPSS rescore
  4. 2026-06-21 01:59 UTCEPSS rescore
  5. 2026-06-19 19:25 UTCEPSS rescore
  6. 2026-06-18 17:52 UTCEPSS rescore
  7. 2026-06-18 17:52 UTCEPSS rescore
  8. 2026-06-17 17:53 UTCEPSS rescore
  9. 2026-06-16 17:52 UTCEPSS rescore
  10. 2026-06-16 08:08 UTCEG score recompute
  11. 2026-06-16 08:08 UTCGHSA enrichment
  12. 2026-06-15 17:49 UTCEPSS rescore
  13. 2026-06-15 01:21 UTCEG score recompute
  14. 2026-06-15 01:21 UTCGHSA enrichment
  15. 2026-06-14 02:35 UTCEG score recompute
  16. 2026-06-14 02:35 UTCGHSA enrichment
  17. 2026-06-13 23:00 UTCEPSS rescore
  18. 2026-06-12 23:12 UTCEPSS rescore
  19. 2026-06-12 23:12 UTCEPSS rescore
  20. 2026-06-12 14:28 UTCEG score recompute
  21. 2026-06-12 14:28 UTCGHSA enrichment
  22. 2026-06-11 15:15 UTCEG score recompute
  23. 2026-06-11 15:15 UTCGHSA enrichment
  24. 2026-06-11 14:00 UTCEPSS rescore
  25. 2026-06-10 22:18 UTCEPSS rescore
  26. 2026-06-10 16:57 UTCEG score recompute
  27. 2026-06-10 16:57 UTCGHSA enrichment
  28. 2026-06-10 13:22 UTCEPSS rescore
  29. 2026-06-10 13:22 UTCEPSS rescore
  30. 2026-06-09 18:49 UTCEG score recompute
  31. 2026-06-09 18:49 UTCGHSA enrichment
  32. 2026-06-08 20:41 UTCEG score recompute
  33. 2026-06-08 20:41 UTCGHSA enrichment
  34. 2026-06-08 14:17 UTCEPSS rescore
  35. 2026-06-08 14:17 UTCEPSS rescore
  36. 2026-06-07 19:12 UTCEG score recompute
  37. 2026-06-07 19:12 UTCGHSA enrichment
  38. 2026-06-07 15:25 UTCEPSS rescore
  39. 2026-06-07 15:25 UTCEPSS rescore
  40. 2026-06-06 21:04 UTCEG score recompute
  41. 2026-06-06 21:04 UTCGHSA enrichment
  42. 2026-06-06 13:47 UTCEPSS rescore
  43. 2026-06-06 13:47 UTCEPSS rescore
  44. 2026-06-05 22:52 UTCEG score recompute
  45. 2026-06-05 22:52 UTCGHSA enrichment
  46. 2026-06-05 22:47 UTCEPSS rescore
  47. 2026-06-05 06:10 UTCEPSS rescore
  48. 2026-06-05 06:10 UTCEPSS rescore
  49. 2026-06-05 00:40 UTCEG score recompute
  50. 2026-06-05 00:40 UTCGHSA enrichment
  51. 2026-06-04 13:12 UTCEPSS rescore
  52. 2026-06-04 13:12 UTCEPSS rescore
  53. 2026-06-04 02:13 UTCEG score recompute
  54. 2026-06-04 02:13 UTCGHSA enrichment
  55. 2026-06-03 04:05 UTCEG score recompute
  56. 2026-06-03 04:05 UTCGHSA enrichment
  57. 2026-06-02 20:13 UTCEPSS rescore
  58. 2026-06-02 05:51 UTCEG score recompute
  59. 2026-06-02 05:51 UTCGHSA enrichment
  60. 2026-06-01 13:52 UTCEPSS rescore
  61. 2026-06-01 13:52 UTCEPSS rescore
  62. 2026-06-01 07:43 UTCEG score recompute▲ 5.50
  63. 2026-06-01 07:43 UTCGHSA enrichment
  64. 2026-05-31 22:30 UTCEPSS rescore
  65. 2026-05-31 22:30 UTCEPSS rescore
  66. 2026-05-31 00:16 UTCEPSS rescore
  67. 2026-05-31 00:16 UTCEPSS rescore
  68. 2026-05-29 13:44 UTCEPSS rescore
  69. 2026-05-29 13:44 UTCEPSS rescore
  70. 2026-05-28 13:44 UTCEPSS rescore
  71. 2026-05-28 13:44 UTCEPSS rescore
  72. 2026-05-27 13:40 UTCEPSS rescore
  73. 2026-05-27 13:40 UTCEPSS rescore
  74. 2026-05-26 13:44 UTCEPSS rescore
  75. 2026-05-26 07:18 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-43445?
CVE-2026-43445 is a medium vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: e1000/e1000e: Fix leak in DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented after a successful mapping, it will…
When was CVE-2026-43445 disclosed?
CVE-2026-43445 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43445 actively exploited?
CVE-2026-43445 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43445?
CVE-2026-43445 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43445?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43445, 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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