CVE-2026-43359

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:

btrfs: fix transaction abort on set received ioctl due to item overflow

If the set received ioctl fails due to an item overflow when attempting to add the BTRFS_UUID_KEY_RECEIVED_SUBVOL we have to abort the transaction since we did some metadata updates before.

This means that if a user calls this ioctl with the same received UUID field for a lot of subvolumes, we will hit the overflow, trigger the transaction abort and turn the filesystem into RO mode. A malicious user could exploit this, and this ioctl does not even requires that a user has admin privileges (CAP_SYS_ADMIN), only that he/she owns the subvolume.

Fix this by doing an early check for item overflow before starting a transaction. This is also race safe because we are holding the subvol_sem semaphore in exclusive (write) mode.

A test case for fstests will follow soon.

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

Published

May 8, 2026

Last Modified

May 15, 2026

Advisory Details (6)

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

btrfs: fix transaction abort on set received ioctl due to item overflow - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7be
generic

btrfs: fix transaction abort on set received ioctl due to item overflow - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174
generic

btrfs: fix transaction abort on set received ioctl due to item overflow - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1e
generic

btrfs: fix transaction abort on set received ioctl due to item overflow - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadac
generic

btrfs: fix transaction abort on set received ioctl due to item overflow - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517d
generic

btrfs: fix transaction abort on set received ioctl due to item overflow - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5

Vendor Advisories for CVE-2026-43359(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 / 43× 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. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-09 19:10 UTCEPSS rescore
  4. 2026-07-08 15:16 UTCEPSS rescore
  5. 2026-07-07 13:46 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-01 15:06 UTCEPSS rescore
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-29 14:06 UTCEPSS rescore
  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 04:59 UTCEG score recompute
  15. 2026-06-28 04:59 UTCGHSA enrichment
  16. 2026-06-28 04:56 UTCEPSS rescore
  17. 2026-06-27 03:08 UTCEPSS rescore
  18. 2026-06-26 21:28 UTCEG score recompute
  19. 2026-06-26 21:27 UTCGHSA enrichment
  20. 2026-06-25 13:49 UTCEPSS rescore
  21. 2026-06-25 13:49 UTCEPSS rescore
  22. 2026-06-24 14:05 UTCEPSS rescore
  23. 2026-06-23 21:33 UTCEPSS rescore
  24. 2026-06-22 14:25 UTCEPSS rescore
  25. 2026-06-22 14:25 UTCEPSS rescore
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  1. 2026-06-21 14:56 UTCEPSS rescore
  2. 2026-06-21 14:56 UTCEPSS rescore
  3. 2026-06-21 01:59 UTCEPSS rescore
  4. 2026-06-19 19:25 UTCEPSS rescore
  5. 2026-06-18 17:52 UTCEPSS rescore
  6. 2026-06-18 17:52 UTCEPSS rescore
  7. 2026-06-17 17:53 UTCEPSS rescore
  8. 2026-06-17 01:51 UTCEG score recompute
  9. 2026-06-17 01:51 UTCGHSA enrichment
  10. 2026-06-16 17:52 UTCEPSS rescore
  11. 2026-06-15 17:49 UTCEPSS rescore
  12. 2026-06-15 04:24 UTCEG score recompute
  13. 2026-06-15 04:24 UTCGHSA enrichment
  14. 2026-06-14 02:55 UTCEG score recompute
  15. 2026-06-14 02:55 UTCGHSA enrichment
  16. 2026-06-13 23:00 UTCEPSS rescore
  17. 2026-06-12 23:12 UTCEPSS rescore
  18. 2026-06-12 23:12 UTCEPSS rescore
  19. 2026-06-12 02:02 UTCEG score recompute
  20. 2026-06-12 02:02 UTCGHSA enrichment
  21. 2026-06-11 14:00 UTCEPSS rescore
  22. 2026-06-11 00:32 UTCEG score recompute
  23. 2026-06-11 00:32 UTCGHSA enrichment
  24. 2026-06-10 22:18 UTCEPSS rescore
  25. 2026-06-10 13:22 UTCEPSS rescore
  26. 2026-06-10 13:22 UTCEPSS rescore
  27. 2026-06-09 22:45 UTCEG score recompute
  28. 2026-06-09 22:45 UTCGHSA enrichment
  29. 2026-06-08 20:45 UTCEG score recompute
  30. 2026-06-08 20:45 UTCGHSA enrichment
  31. 2026-06-08 14:17 UTCEPSS rescore
  32. 2026-06-08 14:17 UTCEPSS rescore
  33. 2026-06-07 16:46 UTCEG score recompute
  34. 2026-06-07 16:46 UTCGHSA enrichment
  35. 2026-06-07 15:25 UTCEPSS rescore
  36. 2026-06-07 15:25 UTCEPSS rescore
  37. 2026-06-06 15:17 UTCEG score recompute
  38. 2026-06-06 15:17 UTCGHSA enrichment
  39. 2026-06-06 13:47 UTCEPSS rescore
  40. 2026-06-06 13:47 UTCEPSS rescore
  41. 2026-06-05 22:47 UTCEPSS rescore
  42. 2026-06-05 13:48 UTCEG score recompute
  43. 2026-06-05 13:48 UTCGHSA enrichment
  44. 2026-06-05 06:10 UTCEPSS rescore
  45. 2026-06-05 06:10 UTCEPSS rescore
  46. 2026-06-04 13:12 UTCEPSS rescore
  47. 2026-06-04 13:12 UTCEPSS rescore
  48. 2026-06-04 12:19 UTCEG score recompute
  49. 2026-06-04 12:19 UTCGHSA enrichment
  50. 2026-06-03 10:49 UTCEG score recompute
  51. 2026-06-03 10:49 UTCGHSA enrichment
  52. 2026-06-02 20:13 UTCEPSS rescore
  53. 2026-06-02 09:20 UTCEG score recompute
  54. 2026-06-02 09:20 UTCGHSA enrichment
  55. 2026-06-01 13:52 UTCEPSS rescore
  56. 2026-06-01 13:52 UTCEPSS rescore
  57. 2026-06-01 07:51 UTCEG score recompute
  58. 2026-06-01 07:51 UTCGHSA enrichment
  59. 2026-05-31 22:30 UTCEPSS rescore
  60. 2026-05-31 22:30 UTCEPSS rescore
  61. 2026-05-31 00:16 UTCEPSS rescore
  62. 2026-05-31 00:16 UTCEPSS rescore
  63. 2026-05-29 13:44 UTCEPSS rescore
  64. 2026-05-29 13:44 UTCEPSS rescore
  65. 2026-05-28 13:44 UTCEPSS rescore
  66. 2026-05-28 13:44 UTCEPSS rescore
  67. 2026-05-27 13:40 UTCEPSS rescore
  68. 2026-05-27 13:40 UTCEPSS rescore
  69. 2026-05-26 13:44 UTCEPSS rescore
  70. 2026-05-26 07:18 UTCEPSS rescore
  71. 2026-05-21 22:43 UTCEPSS rescore
  72. 2026-05-20 22:38 UTCEPSS rescore
  73. 2026-05-20 13:40 UTCEG score recompute
  74. 2026-05-20 13:40 UTCGHSA enrichment
  75. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43359?
CVE-2026-43359 is a medium vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: btrfs: fix transaction abort on set received ioctl due to item overflow If the set received ioctl fails due to an item overflow when attempting to add the BTRFSUUIDKEYRECEIVEDSUBVOL we have to abort the transaction since we did…
When was CVE-2026-43359 disclosed?
CVE-2026-43359 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43359 actively exploited?
CVE-2026-43359 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-2026-43359?
CVE-2026-43359 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43359?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43359, 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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