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CVE-2026-45962

📛 CVE Title

ublk: Validate SQE128 flag before accessing the cmd

⬇ Download JSON ⚠ View as Threat

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: Validate SQE128 flag before accessing the cmd ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before IO_URING_F_SQE128 flag check. This could cause out of boundary memory access. Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return -EINVAL immediately if the flag is not set.

Overview

State
PUBLISHED
Assigner (CNA)
Linux
CVSS severity
high
CVSS score
CVSS 7.1 / 10 7.1 7.1 / 10
CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Effective score
7.1 / 10 HIGH source: CNA overview
CWE(s)
—
Reserved
2026-05-13
Published
2026-05-27 12:18 UTC
Last updated
2026-05-27 12:18 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45962.json
Linked Threat
CVE-2026-45962 — CVE-2026-45962

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-27 14:17:12 UTC
NVD last modified
2026-06-17 10:52:48 UTC
NVD CVSS v3.1
CVSS 5.5 / 10 5.5 5.5 / 10 MEDIUM source: nvd@nist.gov
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore
1.8 / 10
Impact subscore
3.6 / 10
EPSS score
0.0016 (probability of exploitation in next 30 days)
EPSS percentile
5.64% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01

NVD / KEV / EPSS data refreshed 2026-08-01 17:12 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

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-2026-32246
Assigner
Linux
Published
May 27, 2026, 12:18:19 PM
Updated
May 27, 2026, 12:18:19 PM
EUVD base score
0.0 / 10
EUVD-reported EPSS
0.1600
Vendors
Linux
Products
Linux (71f28f3136aff5890cd56de78abc673f8393cad9 <f75a5555e0049e7857eae25b60aee98b80e287ec)
Linux (6.0)
Linux (patch: 7.0)
Linux (71f28f3136aff5890cd56de78abc673f8393cad9 <da7e4b75e50c087d2031a92f6646eb90f7045a67)
Linux (patch: 6.18.14)
Linux (71f28f3136aff5890cd56de78abc673f8393cad9 <4b4dff498f46e9802f71bc84258bf73065f51c6a)
Linux (71f28f3136aff5890cd56de78abc673f8393cad9 <31cac6acf77ece488f29fb8f79589d9298e969c8)
Linux (patch: 0)
Linux (71f28f3136aff5890cd56de78abc673f8393cad9 <17d33ba7291100008360b5a354962db37ad80684)
Linux (71f28f3136aff5890cd56de78abc673f8393cad9 <dbe8e81a2ec608f87f79a34f6444cd62f6a243bb)
Linux (patch: 6.6.128)
Linux (patch: 6.1.165)
Linux (patch: 6.19.4)
Linux (patch: 6.12.75)
Aliases
GHSA-6w6r-q9pw-cwq6

ENISA description: In the Linux kernel, the following vulnerability has been resolved: ublk: Validate SQE128 flag before accessing the cmd ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before IO_URING_F_SQE128 flag check. This could cause out of boundary memory access. Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return -EINVAL immediately if the flag is not set.

EUVD references (6)

Affected products (2)
VendorProductVersionsPlatforms
Linux Linux 71f28f3136aff5890cd56de78abc673f8393cad9 (affected), 71f28f3136aff5890cd56de78abc673f8393cad9 (affected), 71f28f3136aff5890cd56de78abc673f8393cad9 (affected), 71f28f3136aff5890cd56de78abc673f8393cad9 (affected), 71f28f3136aff5890cd56de78abc673f8393cad9 (affected), 71f28f3136aff5890cd56de78abc673f8393cad9 (affected) —
Linux Linux 6.0 (affected), 0 (unaffected), 6.1.165 (unaffected), 6.6.128 (unaffected), 6.12.75 (unaffected), 6.18.14 (unaffected), 6.19.4 (unaffected), 7.0 (unaffected) —

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor references (6)

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

Web references (9)

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

NVD-tagged references (6)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (18)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Microsoft Patch Tuesday May 2026 - 120 Vulnerabilities Fixed, Including ...
    web:cybersecuritynews.com

    Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.

    2026-06-04 00:14 UTC
  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-06-04 00:14 UTC
  • SharePoint Has a New RCE Flaw. If You Haven't Patched Yet, Go Do That.
    web:securityaffairs.com

    A critical vulnerability ( CVE - 2026 -45659) in Microsoft SharePoint can allow attackers to achieve remote code execution with little effort.

    2026-06-04 00:14 UTC
  • March 13, 2026—Hotpatch KB5084597 (OS Builds 26200.7982 and 26100.7982 ...
    web:support.microsoft.com

    The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change. [Networking] Fixed: This update addresses a security issue in the Windows Routing and Remote Access Service (RRAS) management tool. If you connect to a malicious remote server, an attacker could disrupt the tool or run code on your device. For more ...

    2026-06-04 00:14 UTC
  • Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...
    web:support.servicenow.com

    Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

    2026-06-04 00:14 UTC
  • April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

    2026-06-04 00:14 UTC
  • Microsoft Defender vulnerabilities are being exploited in the wild
    web:www.malwarebytes.com

    The KEV catalog tracks vulnerabilities known to be exploited in the wild and sets patch deadlines for Federal Civilian Executive Branch (FCEB) agencies. Five of the added vulnerabilities are quite old by vulnerability standards. Patches were released in 2008, 2009, and 2010. But the Microsoft Defender vulnerabilities are from this year. Those ...

    2026-06-04 00:14 UTC
  • Oracle Critical Patch Update Advisory - April 2026
    web:www.oracle.com

    This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-06-04 00:14 UTC
  • Oracle Critical Patch Update Advisory - January 2026
    web:www.oracle.com

    Oracle Critical Patch Update Advisory - January 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical ...

    2026-06-04 00:14 UTC
  • Patch Tuesday June 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-06-04 00:14 UTC
  • Microsoft Confirms Defender RoguePlanet 0-Day Exploit and Working to ...
    web:cybersecuritynews.com

    Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.

    2026-06-19 02:27 UTC
  • Microsoft Patches 59 Vulnerabilities Including Six Actively Exploited ...
    web:thehackernews.com

    Microsoft patches 59 vulnerabilities, including six actively exploited zero-days, with CISA mandating urgent federal remediation .

    2026-06-19 02:27 UTC
  • Microsoft February 2026 Patch Tuesday fixes 6 zero-days, 58 flaws
    web:www.bleepingcomputer.com

    Today is Microsoft's February 2026 Patch Tuesday with security updates for 58 flaws, including 6 actively exploited and three publicly disclosed zero-day vulnerabilities.

    2026-06-19 02:27 UTC
  • May 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.

    2026-06-19 02:27 UTC
  • Microsoft fixes six zero-days on February 2026 Patch Tuesday
    web:www.csoonline.com

    Microsoft highlighted six new and actively exploited vulnerabilities among the 60 fixes issued in today's February Patch Tuesday releases.

    2026-06-19 02:27 UTC
  • Microsoft February 2026 Patch Tuesday Fixes 50 ... - LinkedIn
    web:www.linkedin.com

    Microsoft has released its February 2026 Patch Tuesday security updates, fixing a total of 59 vulnerabilities across Windows, Microsoft Office, and core system components. The update includes ...

    2026-06-19 02:27 UTC
  • Microsoft working on a fix for RoguePlanet, a flaw that grants full PC ...
    web:www.malwarebytes.com

    Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.

    2026-06-19 02:27 UTC
  • Microsoft Technical Security Notifications
    web:www.microsoft.com

    Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.

    2026-06-19 02:27 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-45962.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/ublk_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4b4dff498f46e9802f71bc84258bf73065f51c6a",
              "status": "affected",
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              "versionType": "git"
            },
            {
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            },
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            {
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "6.0",
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: Validate SQE128 flag before accessing the cmd\n\nublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before\nIO_URING_F_SQE128 flag check. This could cause out of boundary memory\naccess.\n\nMove the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return\n-EINVAL immediately if the flag is not set."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:18:19.070Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/f75a5555e0049e7857eae25b60aee98b80e287ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684"
        },
        {
          "url": "https://git.kernel.org/stable/c/da7e4b75e50c087d2031a92f6646eb90f7045a67"
        }
      ],
      "title": "ublk: Validate SQE128 flag before accessing the cmd",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45962",
    "datePublished": "2026-05-27T12:18:19.070Z",
    "dateReserved": "2026-05-13T15:03:33.089Z",
    "dateUpdated": "2026-05-27T12:18:19.070Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}