CVE-2026-23386

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-03-25. 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:

gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL

In DQ-QPL mode, gve_tx_clean_pending_packets() incorrectly uses the RDA buffer cleanup path. It iterates num_bufs times and attempts to unmap entries in the dma array.

This leads to two issues:

  • The dma array shares storage with tx_qpl_buf_ids (union).
Interpreting buffer IDs as DMA addresses results in attempting to unmap incorrect memory locations.
  • num_bufs in QPL mode (counting 2K chunks) can significantly exceed
the size of the dma array, causing out-of-bounds access warnings (trace below is how we noticed this issue).

UBSAN: array-index-out-of-bounds in drivers/net/ethernet/drivers/net/ethernet/google/gve/gve_tx_dqo.c:178:5 index 18 is out of range for type 'dma_addr_t[18]' (aka 'unsigned long long[18]') Workqueue: gve gve_service_task [gve] Call Trace:

dump_stack_lvl+0x33/0xa0 __ubsan_handle_out_of_bounds+0xdc/0x110 gve_tx_stop_ring_dqo+0x182/0x200 [gve] gve_close+0x1be/0x450 [gve] gve_reset+0x99/0x120 [gve] gve_service_task+0x61/0x100 [gve] process_scheduled_works+0x1e9/0x380

Fix this by properly checking for QPL mode and delegating to gve_free_tx_qpl_bufs() to reclaim the buffers.

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
2%
KEV
Not listed

Published

March 25, 2026

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Aug 6, 2026
No patch confirmed yet.
generic

gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fb868db5f4bccd7a78219313ab2917429f715cea
generic

gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c171f90f58974c784db25e0606051541cb71b7f0
generic

gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/71511dae56a75ce161aa746741e5c498feaea393
generic

gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3744ebd8ffaa542ae8110fb449adcac0202f4cc8
generic

gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/07e0c80e17ef781799e7cd5c41a7bf44f1bf6a5f

Vendor Advisories for CVE-2026-23386(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.6.130—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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (117 versions)6.19.8-1—

All Vendor Advisories

(13)

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 / 48× 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 182 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-23386?
CVE-2026-23386 is a medium vulnerability published on March 25, 2026. In the Linux kernel, the following vulnerability has been resolved: gve: fix incorrect buffer cleanup in gvetxcleanpendingpackets for QPL In DQ-QPL mode, gvetxcleanpendingpackets() incorrectly uses the RDA buffer cleanup path. It iterates num_bufs times and attempts to unmap entries in the dma…
When was CVE-2026-23386 disclosed?
CVE-2026-23386 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23386 actively exploited?
CVE-2026-23386 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 97.8% of all scored CVEs.
What is the CVSS score of CVE-2026-23386?
CVE-2026-23386 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-23386?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23386, 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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