CVE-2026-43149

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-06. 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

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:

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()

The priv->rx_buffer and priv->tx_buffer are alloc'd together as contiguous buffers in uhdlc_init() but freed as two buffers in uhdlc_memclean().

Change the cleanup to only call dma_free_coherent() once on the whole buffer.

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
3%
KEV
Not listed

Published

May 6, 2026

Last Modified

May 13, 2026

Advisory Details (8)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d8a522085d09b30aba1016daf1dddac37c0f0285
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d68994e37ac3b285692559776e0279a88a3b5f8d
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ba8d8429e5d6c36f9a654d2b96b9e043c43d92b4
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/84b932bc9899d43e5829e6cf088b72d73a922b2b
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6496fb830cbb741d831225cc4e7e5601c6e42970
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/36bd7d5deef936c4e1e3cd341598140e5c14c1d3
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f85a9655445e67bb0238cfc983d7c383b54938e
generic

net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/011ae5dd84dc9f05eb9b8e1adff44252ac776e7b

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.252—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.

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2026-43149?
CVE-2026-43149 is a medium vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: net: wan/fslucchdlc: Fix dmafreecoherent() in uhdlc_memclean() The priv->rxbuffer and priv->txbuffer are alloc'd together as contiguous buffers in uhdlc_init() but freed as two buffers in uhdlc_memclean(). Change the cleanup to…
When was CVE-2026-43149 disclosed?
CVE-2026-43149 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43149 actively exploited?
CVE-2026-43149 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 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-43149?
CVE-2026-43149 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43149?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43149, 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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