CVE-2026-99279

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reclaim ended sessions on logoff and expiration LOGOFF and previous-session replacement leave sessions Expired with a zero credential expiry. Ended sessions can retain their memory and connection slots when no further setup arrives on the owning connection. Unpublish a logged-off session while the request reference keeps its response signing and encryption keys alive. Remove its procfs entry before dropping the table reference so a reader cannot remove its own entry on the last put. Clear proc_entry after removal to avoid removing it twice. Reclaim ended sessions from the global table in the existing expiration worker before it acquires conn_list_lock. Only select Expired sessions with zero credential expiry and no references beyond the table reference. Keep sessions whose Kerberos credentials expired available for reauthentication. Unlink the session from its setup connection and all channel connections, so SMB2 sessions and sessions with only secondary SMB3 channels are covered. The session already holds connection references, and sessions_table_lock prevents concurrent channel removal. Queue sessions on a separate disposal list, leaving their hash nodes unhashed, and remove procfs entries and drop table references outside the locks. Keep the pending setup check before allocating a new session so abandoned InProgress sessions can release their slots even at the connection limit. Retain the timeout and reference checks and dispose of those sessions outside the locks. Leave ended Expired sessions to the expiration worker.

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: —
CVSS score: —
CVSS vector: —
Effective score: no score available from CNA, NVD, or AI yet
CWE(s): —
Reserved: 2026-09-25
Published: 2026-11-07 14:08 UTC
Last updated: 2026-11-07 14:08 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/99xxx/CVE-2026-99279.json

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European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-119283

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Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`d7fd1f98607f2cd358e583f9548bdf0173090a86` (affected), `d7fd1f98607f2cd358e583f9548bdf0173090a86` (affected), `c99ea7855124ca1428a1e59c2b4590aaef34eacf` (affected), `7.2.8` (affected)	—
Linux	Linux	`7.3` (affected), `0` (unaffected), `7.3.2` (unaffected), `7.4-rc1` (unaffected)	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

Remediations (10)

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Security Update Guide - Microsoft

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Cisco Advance Notification for Publication of October 7, 2026, Security ...

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Microsoft Patch Tracker (November 2026): Exploit-Ranked | Senserva

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Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-11-08 11:06 UTC
SAP Security Patch Day - October 2026

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On 13 th of October 2026 , SAP security patch day saw the release of 16 new security notes and 4 GitHub security advisories. There are 2 updates to previously released security notes.

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CVE-2026-9927 in Chrome - vuldb.com

web:vuldb.com

A security flaw has been discovered in Google Chrome. This vulnerability was named CVE - 2026 -9927. It is recommended to upgrade the affected component.

2026-11-08 11:06 UTC
September 2026 Patch Tuesday: CISO Executive Summary

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This CISO-focused summary highlights the vulnerabilities and critical infrastructure risks that should take priority for remediation following Microsoft's September 2026 Patch Tuesday release.

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Oracle Critical Patch Update Advisory - July 2026

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This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

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Oracle Critical Security Patch Update Advisory - September 2026

web:www.oracle.com

Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.

2026-11-08 11:06 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-99279.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.c",
            "fs/smb/server/mgmt/user_session.c",
            "fs/smb/server/mgmt/user_session.h",
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1767a5e45dbf6a3b12105196dda4fb0ef80b9698",
              "status": "affected",
              "version": "d7fd1f98607f2cd358e583f9548bdf0173090a86",
              "versionType": "git"
            },
            {
              "lessThan": "26534ef335e92b028eb58e44d98d46a0e26af0ec",
              "status": "affected",
              "version": "d7fd1f98607f2cd358e583f9548bdf0173090a86",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c99ea7855124ca1428a1e59c2b4590aaef34eacf",
              "versionType": "git"
            },
            {
              "lessThan": "7.3",
              "status": "affected",
              "version": "7.2.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.c",
            "fs/smb/server/mgmt/user_session.c",
            "fs/smb/server/mgmt/user_session.h",
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.3"
            },
            {
              "lessThan": "7.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.3.*",
              "status": "unaffected",
              "version": "7.3.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.4-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3.2",
                  "versionStartIncluding": "7.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.4-rc1",
                  "versionStartIncluding": "7.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "7.2.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: reclaim ended sessions on logoff and expiration\n\nLOGOFF and previous-session replacement leave sessions Expired with a\nzero credential expiry. Ended sessions can retain their memory and\nconnection slots when no further setup arrives on the owning connection.\n\nUnpublish a logged-off session while the request reference keeps its\nresponse signing and encryption keys alive. Remove its procfs entry\nbefore dropping the table reference so a reader cannot remove its own\nentry on the last put. Clear proc_entry after removal to avoid removing\nit twice.\n\nReclaim ended sessions from the global table in the existing expiration\nworker before it acquires conn_list_lock. Only select Expired sessions\nwith zero credential expiry and no references beyond the table\nreference. Keep sessions whose Kerberos credentials expired available\nfor reauthentication.\n\nUnlink the session from its setup connection and all channel\nconnections, so SMB2 sessions and sessions with only secondary SMB3\nchannels are covered. The session already holds connection references,\nand sessions_table_lock prevents concurrent channel removal. Queue\nsessions on a separate disposal list, leaving their hash nodes unhashed,\nand remove procfs entries and drop table references outside the locks.\n\nKeep the pending setup check before allocating a new session so\nabandoned InProgress sessions can release their slots even at the\nconnection limit. Retain the timeout and reference checks and dispose of\nthose sessions outside the locks. Leave ended Expired sessions to the\nexpiration worker."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-07T14:08:47.243Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1767a5e45dbf6a3b12105196dda4fb0ef80b9698"
        },
        {
          "url": "https://git.kernel.org/stable/c/26534ef335e92b028eb58e44d98d46a0e26af0ec"
        }
      ],
      "title": "ksmbd: reclaim ended sessions on logoff and expiration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99279",
    "datePublished": "2026-11-07T14:08:47.243Z",
    "dateReserved": "2026-09-25T10:25:14.405Z",
    "dateUpdated": "2026-11-07T14:08:47.243Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}