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CVE-2026-99114

CVE-2026-99114

validatingZero is analyzing and reversing it now.

EUVD-2026-112014 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
Linux 5.15
fixed in d8c450ad0d08980b39b08d435efa921086c8b227, 03bb4338c3a7c3fc4decf699a35753f0891aab2a, c0cd3fc6824122014da2b3b0cb7ddeaa2946ec8e
ETK-2026-2859Zero's internal tracking ID, independent of the CVE number., permanent identifier
–running
startingcurrent stage
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0hcheck available+2h
0
+1h

description

Linux kernels with affected ksmbd code can return residual buffer data in filesystem-control information responses. A remote SMB client may obtain limited unintended data disclosure when it can send a compound request to an exposed ksmbd service.

Still under analysis: more detail becomes available as the pipeline runs.

mitigation

Update to a Linux kernel incorporating the applicable fix commit: d8c450ad0d08980b39b08d435efa921086c8b227, 03bb4338c3a7c3fc4decf699a35753f0891aab2a, or c0cd3fc6824122014da2b3b0cb7ddeaa2946ec8e. Until updated, disable ksmbd or restrict SMB access to trusted clients and networks.

fixed in d8c450ad0d08980b39b08d435efa921086c8b227, 03bb4338c3a7c3fc4decf699a35753f0891aab2a, c0cd3fc6824122014da2b3b0cb7ddeaa2946ec8e

check
building now
exploit
not yet
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
–
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
–
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
18m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-28 10:34Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Run in progress: no artifact yet.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-28 10:34Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-99114

this entry in the feed

GET /api/v1/feed/CVE-2026-99114

{
  "etk_id": "ETK-2026-2859",
  "cve_id": "CVE-2026-99114",
  "display_id": "CVE-2026-99114",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-112014",
  "status": "in_pipeline",
  "anchor_state": "anchored",
  "title": "Uninitialized response data disclosure in Linux ksmbd",
  "summary": "Linux kernels with affected ksmbd code can return residual buffer data in filesystem-control information responses. A remote SMB client may obtain limited unintended data disclosure when it can send a compound request to an exposed ksmbd service.",
  "mitigation": "Update to a Linux kernel incorporating the applicable fix commit: d8c450ad0d08980b39b08d435efa921086c8b227, 03bb4338c3a7c3fc4decf699a35753f0891aab2a, or c0cd3fc6824122014da2b3b0cb7ddeaa2946ec8e. Until updated, disable ksmbd or restrict SMB access to trusted clients and networks.",
  "vendor": "Linux",
  "product": "Linux",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < d8c450ad0d08980b39b08d435efa921086c8b227",
        ">= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 03bb4338c3a7c3fc4decf699a35753f0891aab2a",
        ">= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < c0cd3fc6824122014da2b3b0cb7ddeaa2946ec8e"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "d8c450ad0d08980b39b08d435efa921086c8b227",
        "03bb4338c3a7c3fc4decf699a35753f0891aab2a",
        "c0cd3fc6824122014da2b3b0cb7ddeaa2946ec8e"
      ],
      "package_name": "Linux",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "5.15"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Linux",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": null,
  "cvss_src": null,
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 17.957398183333332,
  "t0_at": "2026-10-28T10:34:31.576000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-28T12:34:45.399788+00:00",
      "days": 0.08349333087962962,
      "is_lower_bound": false,
      "measured_at": "2026-10-28T10:34:31.576000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-28T10:34:31.576000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-28T10:34:31.576000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-99114"
    }
  }
}

published 2026-10-28 11:35Z
last change 2026-10-28 14:32Z

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