CVE-2026-45953

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix IO hang with degraded array with llbitmap When llbitmap bit state is still unwritten, any new write should force rcw, as bitmap_ops->blocks_synced() is checked in handle_stripe_dirtying(). However, later the same check is missing in need_this_block(), causing stripe to deadloop during handling because handle_stripe() will decide to go to handle_stripe_fill(), meanwhile need_this_block() always return 0 and nothing is handled.

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: high
CVSS score: 7.1 / 10
CVSS vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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-2026-45953.json
Linked Threat: CVE-2026-45953 — CVE-2026-45953

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 14:17:11 UTC
NVD last modified: 2026-06-17 10:52:47 UTC
NVD CVSS v3.1: 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: 0.0012 (probability of exploitation in next 30 days)
EPSS percentile: 2.23% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01

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-2026-32237
Assigner: Linux
Published: May 27, 2026, 12:18:09 PM
Updated: May 27, 2026, 12:18:09 PM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.1200
Vendors: Linux
Products: Linux (6.18)

Linux (patch: 6.19.4)

Linux (5ab829f1971dc99f2aac10846c378e67fc875abc <28ef299e7a5b81817f8ca8297c2ddff28f5da5e8)

Linux (5ab829f1971dc99f2aac10846c378e67fc875abc <870b9f15867b0e70f3459ef3974b043e8b229690)

Linux (patch: 0)

Linux (patch: 7.0)

Linux (patch: 6.18.14)

Linux (5ab829f1971dc99f2aac10846c378e67fc875abc <cd1635d844d26471c56c0a432abdee12fc9ad735)
Aliases: GHSA-w54p-gjcx-42f6

ENISA description: In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix IO hang with degraded array with llbitmap When llbitmap bit state is still unwritten, any new write should force rcw, as bitmap_ops->blocks_synced() is checked in handle_stripe_dirtying(). However, later the same check is missing in need_this_block(), causing stripe to deadloop during handling because handle_stripe() will decide to go to handle_stripe_fill(), meanwhile need_this_block() always return 0 and nothing is handled.

EUVD references (3)

Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`5ab829f1971dc99f2aac10846c378e67fc875abc` (affected), `5ab829f1971dc99f2aac10846c378e67fc875abc` (affected), `5ab829f1971dc99f2aac10846c378e67fc875abc` (affected)	—
Linux	Linux	`6.18` (affected), `0` (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 (3)

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

Web references (6)

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

https://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8 tenable:git.kernel.org
https://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690 tenable:git.kernel.org
https://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735 tenable:git.kernel.org
https://nvd.nist.gov/vuln/detail/CVE-2026-45953 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-45953 tenable:www.cve.org
https://www.first.org/epss/ tenable:www.first.org

NVD-tagged references (3)

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

https://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch

Remediations (15)

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
Microsoft Releases Mitigation for Windows BitLocker Security Bypass 0 ...

web:cybersecuritynews.com

No patch has been released yet; Microsoft has instead issued a multi-step manual mitigation guide while a formal security update is prepared. Windows BitLocker Security Bypass The vulnerability originates in WinRE's handling of the BootExecute registry value under HKLM\ControlSet001\Control\Session Manager.

2026-06-04 00:14 UTC
Security Update Guide - Microsoft Security Response Center

web:msrc.microsoft.com

Security Update Guide - Microsoft Security Response Center

2026-06-04 00:14 UTC
Nvd - Cve-2026-8953

web:nvd.nist.gov

An official website of the United States government Here's how you know

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
February's Patch Tuesday release fixes 59 flaws ... - Computerworld

web:www.computerworld.com

Each month, the team at Readiness analyzes the latest Patch Tuesday updates from Microsoft and provides detailed, actionable testing guidance. The company's Patch Tuesday release for February ...

2026-06-04 00:14 UTC
Grammarly: Free AI Writing Assistance

web:www.grammarly.com

Grammarly makes AI writing convenient. Work smarter with personalized AI guidance and text generation on any app or website.

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
Microsoft Rolls Out Mitigations for 'YellowKey' BitLocker Bypass

web:www.securityweek.com

Microsoft has announced mitigations for CVE - 2026 -45585, a BitLocker bypass triggered via FsTx in Windows Recovery.

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
Security Update Guide - Microsoft Security Response Center

web:msrc.microsoft.com

Security Update Guide - Microsoft Security Response Center

2026-06-19 02:27 UTC
Oracle Critical Security Patch Update Advisory - May 2026

web:www.oracle.com

This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.

2026-06-19 02:27 UTC
Patch Tuesday May 2026 - PDQ

web:www.pdq.com

May 2026 Patch Tuesday is here, and PDQ is back with another recap. Will we see another month of increased CVE volume? Is AI to blame? Dive in to learn more.

2026-06-19 02:27 UTC
Patch Tuesday - June 2026 - Rapid7

web:www.rapid7.com

Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.

2026-06-19 02:27 UTC
Quantifying 2026 Routinely Targeted Vulnerabilities (So Far)

web:www.vulncheck.com

VulnCheck identified 25 CVEs disclosed in 2026 that have been routinely targeted by adversaries and researchers so far this year, drawing from a global body of exploit code and exploitation data.

2026-06-19 02:27 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-45953.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "870b9f15867b0e70f3459ef3974b043e8b229690",
              "status": "affected",
              "version": "5ab829f1971dc99f2aac10846c378e67fc875abc",
              "versionType": "git"
            },
            {
              "lessThan": "28ef299e7a5b81817f8ca8297c2ddff28f5da5e8",
              "status": "affected",
              "version": "5ab829f1971dc99f2aac10846c378e67fc875abc",
              "versionType": "git"
            },
            {
              "lessThan": "cd1635d844d26471c56c0a432abdee12fc9ad735",
              "status": "affected",
              "version": "5ab829f1971dc99f2aac10846c378e67fc875abc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/raid5.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "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": "6.18.14",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: fix IO hang with degraded array with llbitmap\n\nWhen llbitmap bit state is still unwritten, any new write should force\nrcw, as bitmap_ops->blocks_synced() is checked in handle_stripe_dirtying().\nHowever, later the same check is missing in need_this_block(), causing\nstripe to deadloop during handling because handle_stripe() will decide\nto go to handle_stripe_fill(), meanwhile need_this_block() always return\n0 and nothing is handled."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:18:09.203Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690"
        },
        {
          "url": "https://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735"
        }
      ],
      "title": "md/raid5: fix IO hang with degraded array with llbitmap",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45953",
    "datePublished": "2026-05-27T12:18:09.203Z",
    "dateReserved": "2026-05-13T15:03:33.088Z",
    "dateUpdated": "2026-05-27T12:18:09.203Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}