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 — 5 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
40%
KEV
Not listed

Published

May 28, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Sep 16, 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(6)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-14ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-14ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-14ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-09-14ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-09-14ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-09-14ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-09-14ubuntu
redhatkernel-0:5.14.0-570.140.1.el9_62026-09-09redhat
redhatkernel-0:6.12.0-55.103.1.el10_02026-09-08redhat
redhatkernel-0:6.12.0-211.31.1.el10_22026-07-08redhat
redhatkernel-0:5.14.0-687.22.1.el9_82026-07-06redhat
linuxKernel @ 6.6.140—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 ... 6.12.88-1~bpo12+1 (21 versions)6.12.88-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (136 versions)7.0.7-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(7)

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 10× in last 7d / 55× 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 557 total refreshes for this CVE.

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

Related CVEs(same product + 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 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 59.7% 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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