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
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 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)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

May 28, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Aug 29, 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/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/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/512d33bc8ea4ea5c19728ee118715f4b1f4d1926
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/dffb44b2e06a2908e249f0f93156fc987eee1d1c

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(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-25ubuntu
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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.88-1~bpo12+1 (21 versions)6.12.88-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (133 versions)7.0.7-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(6)

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 11× in last 7d / 220× 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 538 total refreshes for this CVE.

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

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 August 5, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 60.7% of all scored CVEs.
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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