Vulnerability-Lookup

CVE-2026-45834 (GCVE-0-2026-45834)

Vulnerability from cvelistv5 – Published: 2026-05-26 16:14 – Updated: 2026-06-14 17:45

Title

Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/1b1c0da227bf63479…
https://git.kernel.org/stable/c/85426e97dc72f2088…
https://git.kernel.org/stable/c/0c17c8832562b2aac…
https://git.kernel.org/stable/c/5105f3e6b2df619c6…
https://git.kernel.org/stable/c/c88c185ae0a106782…
https://git.kernel.org/stable/c/1810e42ff6716f320…
https://git.kernel.org/stable/c/a2dcf1a61d056aef1…
https://git.kernel.org/stable/c/2ff1a41a912de8517…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < 1b1c0da227bf63479bac9982fc8d12df9aaea0fb (git) Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < 85426e97dc72f2088ba6d27e74cd58c3fbd43e31 (git) Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < 0c17c8832562b2aac288e89cefd0f46074f54bcb (git) Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < 5105f3e6b2df619c635b5f6a49fac131a36c7952 (git) Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < c88c185ae0a1067823661b220aeea613df2c127b (git) Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < 1810e42ff6716f320c7269d5850eca48b07b7427 (git) Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < a2dcf1a61d056aef15b63c6eae9441344d624389 (git) Affected: 89bc500e41fc5b48e0573e6b0d927fc97b8951dc , < 2ff1a41a912de8517b4482e946dd951b7d80edbf (git)
Linux	Linux	Affected: 3.1 Unaffected: 0 , < 3.1 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-45834",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45834.json",
      "version": "5"
    }
  }
}

WID-SEC-W-2026-1684

Vulnerability from csaf_certbund - Published: 2026-05-26 22:00 - Updated: 2026-06-08 22:00

Summary

Linux Kernel (Bluetooth): Mehrere Schwachstellen ermöglichen Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Der Kernel stellt den Kern des Linux Betriebssystems dar.

Angriff: Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel bezüglich der Bluetooth Komponente ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme: - Linux

CVE-2026-45834

Affected products

Known affected 6 products

Product	Identifier	Version
Open Source Linux Kernel <7.1-rc3 Open Source / Linux Kernel		<7.1-rc3
Open Source Linux Kernel <7.0.7 Open Source / Linux Kernel		<7.0.7
SUSE openSUSE SUSE	`cpe:/o:suse:opensuse:-`	—
Open Source Linux Kernel <6.18.30 Open Source / Linux Kernel		<6.18.30
Open Source Linux Kernel <6.12.90 Open Source / Linux Kernel		<6.12.90
Open Source Linux Kernel <6.6.140 Open Source / Linux Kernel		<6.6.140

CVE-2026-45835

Affected products

Known affected 6 products

Product	Identifier	Version
Open Source Linux Kernel <7.1-rc3 Open Source / Linux Kernel		<7.1-rc3
Open Source Linux Kernel <7.0.7 Open Source / Linux Kernel		<7.0.7
SUSE openSUSE SUSE	`cpe:/o:suse:opensuse:-`	—
Open Source Linux Kernel <6.18.30 Open Source / Linux Kernel		<6.18.30
Open Source Linux Kernel <6.12.90 Open Source / Linux Kernel		<6.12.90
Open Source Linux Kernel <6.6.140 Open Source / Linux Kernel		<6.6.140

CVE-2026-45836

Affected products

Known affected 6 products

Product	Identifier	Version
Open Source Linux Kernel <7.1-rc3 Open Source / Linux Kernel		<7.1-rc3
Open Source Linux Kernel <7.0.7 Open Source / Linux Kernel		<7.0.7
SUSE openSUSE SUSE	`cpe:/o:suse:opensuse:-`	—
Open Source Linux Kernel <6.18.30 Open Source / Linux Kernel		<6.18.30
Open Source Linux Kernel <6.12.90 Open Source / Linux Kernel		<6.12.90
Open Source Linux Kernel <6.6.140 Open Source / Linux Kernel		<6.6.140

References

7 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://lore.kernel.org/linux-cve-announce/	external
https://lore.kernel.org/linux-cve-announce/202605…	external
https://lore.kernel.org/linux-cve-announce/202605…	external
https://lore.kernel.org/linux-cve-announce/202605…	external
https://lists.opensuse.org/archives/list/security…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Der Kernel stellt den Kern des Linux Betriebssystems dar.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel bez\u00fcglich der Bluetooth Komponente ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1684 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1684.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1684 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1684"
      },
      {
        "category": "external",
        "summary": "Kernel CVE Announce Mailingliste",
        "url": "https://lore.kernel.org/linux-cve-announce/"
      },
      {
        "category": "external",
        "summary": "Linux Kernel CVE Announcement CVE-2026-45834",
        "url": "https://lore.kernel.org/linux-cve-announce/2026052627-CVE-2026-45834-79da@gregkh/"
      },
      {
        "category": "external",
        "summary": "Linux Kernel CVE Announcement CVE-2026-45835",
        "url": "https://lore.kernel.org/linux-cve-announce/2026052629-CVE-2026-45835-4da4@gregkh/"
      },
      {
        "category": "external",
        "summary": "Linux Kernel CVE Announcement CVE-2026-45836",
        "url": "https://lore.kernel.org/linux-cve-announce/2026052629-CVE-2026-45836-9f4d@gregkh/"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:10954-1 vom 2026-06-08",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/SCML3YIY7XP4A5LIAG3VJHEVKSFGU6XF/"
      }
    ],
    "source_lang": "en-US",
    "title": "Linux Kernel (Bluetooth): Mehrere Schwachstellen erm\u00f6glichen Denial of Service",
    "tracking": {
      "current_release_date": "2026-06-08T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-09T08:42:02.602+00:00",
        "engine": {
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          "version": "1.6.0"
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      "id": "WID-SEC-W-2026-1684",
      "initial_release_date": "2026-05-26T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-05-26T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-06-08T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von openSUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c7.0.7",
                "product": {
                  "name": "Open Source Linux Kernel \u003c7.0.7",
                  "product_id": "T054231"
                }
              },
              {
                "category": "product_version",
                "name": "7.0.7",
                "product": {
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                  "product_identification_helper": {
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              },
              {
                "category": "product_version_range",
                "name": "\u003c7.1-rc3",
                "product": {
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                  "product_id": "T054232"
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              },
              {
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                "name": "7.1-rc3",
                "product": {
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                "product": {
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                  "product_id": "T054731"
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              },
              {
                "category": "product_version",
                "name": "6.6.140",
                "product": {
                  "name": "Open Source Linux Kernel 6.6.140",
                  "product_id": "T054731-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:linux:linux_kernel:6.6.140"
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              },
              {
                "category": "product_version_range",
                "name": "\u003c6.12.90",
                "product": {
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                  "product_id": "T054732"
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              },
              {
                "category": "product_version",
                "name": "6.12.90",
                "product": {
                  "name": "Open Source Linux Kernel 6.12.90",
                  "product_id": "T054732-fixed",
                  "product_identification_helper": {
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                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c6.18.30",
                "product": {
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              {
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        ],
        "category": "vendor",
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      {
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        ],
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  "vulnerabilities": [
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      "cve": "CVE-2026-45834",
      "product_status": {
        "known_affected": [
          "T054232",
          "T054231",
          "T027843",
          "T054733",
          "T054732",
          "T054731"
        ]
      },
      "release_date": "2026-05-26T22:00:00.000+00:00",
      "title": "CVE-2026-45834"
    },
    {
      "cve": "CVE-2026-45835",
      "product_status": {
        "known_affected": [
          "T054232",
          "T054231",
          "T027843",
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          "T054732",
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      },
      "release_date": "2026-05-26T22:00:00.000+00:00",
      "title": "CVE-2026-45835"
    },
    {
      "cve": "CVE-2026-45836",
      "product_status": {
        "known_affected": [
          "T054232",
          "T054231",
          "T027843",
          "T054733",
          "T054732",
          "T054731"
        ]
      },
      "release_date": "2026-05-26T22:00:00.000+00:00",
      "title": "CVE-2026-45836"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-45834 (GCVE-0-2026-45834)

WID-SEC-W-2026-1684

Tags

Sightings

Nomenclature