CVE-2026-43069

CVEs › CVE-2026-43069

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ll: Fix firmware leak on error path Smatch reports: drivers/bluetooth/hci_ll.c:587 download_firmware() warn: 'fw' from request_firmware() not released on lines: 544. In download_firmware(), if request_firmware() succeeds but the returned firmware content is invalid (no data or zero size), the function returns without releasing the firmware, resulting in a resource leak. Fix this by calling release_firmware() before returning when request_firmware() succeeded but the firmware content is invalid.

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: critical
CVSS score: 9.1 / 10
CVSS vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Effective score: 9.1 / 10 CRITICAL source: CNA overview
CWE(s): —
Reserved: 2026-05-01
Published: 2026-05-05 17:23 UTC
Last updated: 2026-05-12 00:17 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43069.json
Linked Threat: CVE-2026-43069 — CVE-2026-43069

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: 2026-05-05 16:16:16 UTC
NVD last modified: 2026-05-06 13:08:07 UTC
EPSS score: 0.0003 (probability of exploitation in next 30 days)
EPSS percentile: 9.59% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 09:10 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-2026-27371
Assigner: Linux
Published: May 5, 2026, 3:23:28 PM
Updated: May 11, 2026, 10:17:07 PM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.0100
Vendors: Linux
Products: Linux (patch: 6.12.80)

Linux (4.12)

Linux (371805522f870986144fcd88727a47858e364a2c <95e8601af227b2b4390eecf8db6abdb9f6a91f17)

Linux (371805522f870986144fcd88727a47858e364a2c <e6d95488c8c964d1df0d3e1db44c958706311e86)

Linux (patch: 6.19.11)

Linux (patch: 0)

Linux (371805522f870986144fcd88727a47858e364a2c <31148a7be723aa9f2e8fbd62424825ab8d577973)

Linux (371805522f870986144fcd88727a47858e364a2c <5213ef54528dd1ac79b846e30d8f72ce092794aa)

Linux (patch: 7.0)

Linux (patch: 5.15.203)

Linux (patch: 6.18.21)

Linux (371805522f870986144fcd88727a47858e364a2c <a7803df606a7d22e896b030f619e1d9d20ae0c6b)

Linux (patch: 5.10.253)

Linux (371805522f870986144fcd88727a47858e364a2c <28904375d54b436a757641fb0331537778c0de5a)

Linux (patch: 6.1.168)

Linux (patch: 6.6.131)

Linux (371805522f870986144fcd88727a47858e364a2c <9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b)

Linux (371805522f870986144fcd88727a47858e364a2c <b2dfbf1b5ff192cefd49574b951a4af9ddd32213)

ENISA description: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ll: Fix firmware leak on error path Smatch reports: drivers/bluetooth/hci_ll.c:587 download_firmware() warn: 'fw' from request_firmware() not released on lines: 544. In download_firmware(), if request_firmware() succeeds but the returned firmware content is invalid (no data or zero size), the function returns without releasing the firmware, resulting in a resource leak. Fix this by calling release_firmware() before returning when request_firmware() succeeded but the firmware content is invalid.

EUVD references (8)

Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`371805522f870986144fcd88727a47858e364a2c` (affected), `371805522f870986144fcd88727a47858e364a2c` (affected), `371805522f870986144fcd88727a47858e364a2c` (affected), `371805522f870986144fcd88727a47858e364a2c` (affected), `371805522f870986144fcd88727a47858e364a2c` (affected), `371805522f870986144fcd88727a47858e364a2c` (affected), `371805522f870986144fcd88727a47858e364a2c` (affected), `371805522f870986144fcd88727a47858e364a2c` (affected)	—
Linux	Linux	`4.12` (affected), `0` (unaffected), `5.10.253` (unaffected), `5.15.203` (unaffected), `6.1.168` (unaffected), `6.6.131` (unaffected), `6.12.80` (unaffected), `6.18.21` (unaffected), `6.19.11` (unaffected), `7.0` (unaffected)	—

Vendor references (8)

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

MITRE references (8) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (5)

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

https://attackerkb.com/topics/CVE-2026-43069 rapid7:attackerkb.com
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-27371 rapid7:euvd.enisa.europa.eu
https://www.first.org/epss/ tenable:www.first.org
https://nvd.nist.gov/vuln/detail/CVE-2026-43069 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-43069 tenable:www.cve.org

NVD-tagged references (8)

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/28904375d54b436a757641fb0331537778c0de5a 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/31148a7be723aa9f2e8fbd62424825ab8d577973 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5213ef54528dd1ac79b846e30d8f72ce092794aa 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/95e8601af227b2b4390eecf8db6abdb9f6a91f17 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a7803df606a7d22e896b030f619e1d9d20ae0c6b 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b2dfbf1b5ff192cefd49574b951a4af9ddd32213 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e6d95488c8c964d1df0d3e1db44c958706311e86 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remediations (16)

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

CISA Warns of Exploited Microsoft Defender 0-Day Flaws

web:cyberpress.org

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

2026-05-23 21:14 UTC
Security updates for Adobe Acrobat and Reader

web:helpx.adobe.com

Security updates for Adobe Acrobat and Reader Last updated on Apr 14, 2026 | Also applies to Adobe Acrobat

2026-05-23 21:14 UTC
Patch Tuesday, April 2026 Edition - Krebs on Security

web:krebsonsecurity.com

For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?

2026-05-23 21:14 UTC
Oracle CPU April 2026: Delayed RUs & First Analysis

web:oradba.ch

19c 26ai cve oracle-cpu patch -management release-update security Oracle CPU April 2026 : Delayed RUs & First Analysis On April 21, 2026 , Oracle released the Critical Patch Update (CPU) for April 2026 — 481 new security fixes across the entire Oracle product stack. For Oracle Database, this means another round of mandatory patching.

2026-05-23 21:14 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.

2026-05-23 21:14 UTC
Windows 11 KB5083769 April 2026 update triggers death loops and BSODs

web:www.notebookcheck.net

Microsoft's Windows 11 KB5083769 April 2026 update causes critical boot failures, pixelated BSODs, and BitLocker recovery loops on Windows 11 24H2 and 25H2 PCs.

2026-05-23 21:14 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.

2026-05-23 21:14 UTC
Microsoft Issues Massive Windows Patch for 160+ Bugs ... - TechRepublic

web:www.techrepublic.com

Microsoft's April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company's largest monthly security updates.

2026-05-23 21:14 UTC
"This update broke BitLocker for me" — Windows 11's April patch is ...

web:www.windowscentral.com

A faulty BitLocker configuration is forcing some PCs into BitLocker recovery mode after the April 2026 update, but there's a workaround to resolve this issue.

2026-05-23 21:14 UTC
Windows 11 April 2026 Update tested: What's new, improved and fixed

web:www.windowslatest.com

Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.

2026-05-23 21:14 UTC
Microsoft Patch Tuesday April 2026 - 168 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft has released its April 2026 Patch Tuesday security update, addressing 168 vulnerabilities across its product portfolio including one actively exploited zero-day and one publicly disclosed flaw that organizations must prioritize immediately.

2026-06-03 07:49 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-06-03 07:49 UTC
NVD - Home

web:nvd.nist.gov

The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...

2026-06-03 07:49 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 ...

2026-06-03 07:49 UTC
Oracle Patches 450 Vulnerabilities With April 2026 CPU

web:www.securityweek.com

Oracle on Tuesday announced the release of 481 new security patches as part of its April 2026 Critical Patch Update (CPU). Across the 28 product families that received security updates, more than 300 patches address vulnerabilities that are remotely exploitable without authentication. Roughly three dozen fixes resolve critical-severity security defects. There appear to be approximately 450 ...

2026-06-03 07:49 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.

2026-06-03 07:49 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-43069.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_ll.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "95e8601af227b2b4390eecf8db6abdb9f6a91f17",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            },
            {
              "lessThan": "e6d95488c8c964d1df0d3e1db44c958706311e86",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            },
            {
              "lessThan": "b2dfbf1b5ff192cefd49574b951a4af9ddd32213",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            },
            {
              "lessThan": "28904375d54b436a757641fb0331537778c0de5a",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            },
            {
              "lessThan": "5213ef54528dd1ac79b846e30d8f72ce092794aa",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            },
            {
              "lessThan": "9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            },
            {
              "lessThan": "a7803df606a7d22e896b030f619e1d9d20ae0c6b",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            },
            {
              "lessThan": "31148a7be723aa9f2e8fbd62424825ab8d577973",
              "status": "affected",
              "version": "371805522f870986144fcd88727a47858e364a2c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/hci_ll.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.131",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "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": "5.10.253",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.203",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.168",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.131",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_ll: Fix firmware leak on error path\n\nSmatch reports:\n\ndrivers/bluetooth/hci_ll.c:587 download_firmware() warn:\n'fw' from request_firmware() not released on lines: 544.\n\nIn download_firmware(), if request_firmware() succeeds but the returned\nfirmware content is invalid (no data or zero size), the function returns\nwithout releasing the firmware, resulting in a resource leak.\n\nFix this by calling release_firmware() before returning when\nrequest_firmware() succeeded but the firmware content is invalid."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:17:07.130Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/95e8601af227b2b4390eecf8db6abdb9f6a91f17"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6d95488c8c964d1df0d3e1db44c958706311e86"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2dfbf1b5ff192cefd49574b951a4af9ddd32213"
        },
        {
          "url": "https://git.kernel.org/stable/c/28904375d54b436a757641fb0331537778c0de5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/5213ef54528dd1ac79b846e30d8f72ce092794aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ecbfd93cd6de6c78cb7fd51fe079e36c7ff074b"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7803df606a7d22e896b030f619e1d9d20ae0c6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/31148a7be723aa9f2e8fbd62424825ab8d577973"
        }
      ],
      "title": "Bluetooth: hci_ll: Fix firmware leak on error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43069",
    "datePublished": "2026-05-05T15:23:28.120Z",
    "dateReserved": "2026-05-01T14:12:55.982Z",
    "dateUpdated": "2026-05-11T22:17:07.130Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}