CVE-2026-46155

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-28. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

A fix is available — apply it.

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

smb/client: fix out-of-bounds read in smb2_compound_op()

If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len.

Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]);

Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
38.1%
KEV
Not listed

Published

May 28, 2026

Last Modified

June 14, 2026

Advisory Details (5)

Auto-updated May 31, 2026
No patch confirmed yet.
generic

smb/client: fix out-of-bounds read in smb2_compound_op() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c
generic

smb/client: fix out-of-bounds read in smb2_compound_op() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
generic

smb/client: fix out-of-bounds read in smb2_compound_op() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f
generic

smb/client: fix out-of-bounds read in smb2_compound_op() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b
generic

smb/client: fix out-of-bounds read in smb2_compound_op() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926

Vendor Advisories for CVE-2026-46155(4)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-07-16ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-07-16ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-07-16ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-07-16ubuntu
redhatkernel-0:6.12.0-211.31.1.el10_22026-07-08redhat
redhatkernel-0:5.14.0-687.22.1.el9_82026-07-06redhat

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.

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 16× in last 7d / 171× 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 435 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-46155?
CVE-2026-46155 is a critical vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in smb2compoundop() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, checkwsleas() returns success without validating that the entire…
When was CVE-2026-46155 disclosed?
CVE-2026-46155 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on June 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46155 actively exploited?
CVE-2026-46155 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46155?
CVE-2026-46155 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46155?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46155, 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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