CVE-2026-52911

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-21. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

ksmbd: scope conn->binding slowpath to bound sessions only

When the binding SESSION_SETUP sets conn->binding = true, the flag stays set after the call so that the global session lookup in ksmbd_session_lookup_all() can find the session, which was not added to conn->sessions. Because the flag is connection-wide, the global lookup path will also resolve any other session by id if asked.

Tighten the global lookup so that the returned session must have this connection registered in its channel xarray (sess->ksmbd_chann_list). The channel entry is installed by the existing binding_session path in ntlm_authenticate()/krb5_authenticate() when a SESSION_SETUP completes successfully, so this condition is a strict equivalent of "this connection has been accepted as a channel of this session". Connections that have not bound to a given session cannot reach it via the global table.

The existing conn->binding gate for entering the slowpath is preserved so that non-binding connections keep the fast-path-only behavior, and the session->state check is unchanged.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

June 21, 2026

Last Modified

August 5, 2026

Advisory Details (7)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

ksmbd: scope conn->binding slowpath to bound sessions only - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e74c00c6af428a39e564cdc5bd3a3648c6d8de87
generic

ksmbd: scope conn->binding slowpath to bound sessions only - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e3a93ce6e25757b8f375e38b8f91e1d9da4edc1a
generic

ksmbd: scope conn->binding slowpath to bound sessions only - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b0da97c034b6107d14e537e212d4ce8b22109a58
generic

ksmbd: scope conn->binding slowpath to bound sessions only - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/974c1c224e85549dc3459f3bb2255bbbdd2b9372
generic

ksmbd: scope conn->binding slowpath to bound sessions only - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2cc8a4db633b10715450b291c1343859a4b2c509
generic

ksmbd: scope conn->binding slowpath to bound sessions only - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1ff46c9915c1cbf454db58a8cb87f7cac818e6a6
generic

ksmbd: scope conn->binding slowpath to bound sessions only - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1e2bec062c5c9ec282636715166056d0998d746d

Vendor Advisories for CVE-2026-52911(2)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-30ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-30ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-30ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-30ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-30ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-30ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-30ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

All Vendor Advisories

(25)

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 5× in last 7d / 80× 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 263 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-52911?
CVE-2026-52911 is a high vulnerability published on June 21, 2026. In the Linux kernel, the following vulnerability has been resolved: ksmbd: scope conn->binding slowpath to bound sessions only When the binding SESSION_SETUP sets conn->binding = true, the flag stays set after the call so that the global session lookup in ksmbdsessionlookup_all() can find the…
When was CVE-2026-52911 disclosed?
CVE-2026-52911 was first published in the National Vulnerability Database on June 21, 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-2026-52911 actively exploited?
CVE-2026-52911 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 70.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52911?
CVE-2026-52911 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-52911?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52911, 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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