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CVE-2026-45835— Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于蓝牙L2CAP协议中l2cap_sock_new_connection_cb函数缺少空指针检查，可能导致空指针取消引用。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 80808e431e1ef25856457de82ce141bed6a6313a< 140b63cb46f2855ac4ec8fba2f1e974a9c2974e8 affected
80808e431e1ef25856457de82ce141bed6a6313a< 2422eaed0925973c0f318c94eb13e76f14c7381e affected
80808e431e1ef25856457de82ce141bed6a6313a< 684a1f9ee2325437ae18ac5371884e4c6a25ae73 affected
80808e431e1ef25856457de82ce141bed6a6313a< ab77c8bc30269bee15d917059a66bea48909f5f0 affected
80808e431e1ef25856457de82ce141bed6a6313a< bc3bb9f40da8e53896abc2d29c6d0c6686fe4ab9 affected
80808e431e1ef25856457de82ce141bed6a6313a< 741e6024e31587b0c021b6616a9e428a4ea0b64a affected
80808e431e1ef25856457de82ce141bed6a6313a< 76083fb80f5a38ac13326b2d810f66bd07771eea affected
80808e431e1ef25856457de82ce141bed6a6313a< 0a120d96166301d7a95be75b52f843837dbd1219 affected
… +10 more rows
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I. Basic Information for CVE-2026-45835

Vulnerability Information
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Vulnerability Title
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于蓝牙L2CAP协议中l2cap_sock_new_connection_cb函数缺少空指针检查，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 80808e431e1ef25856457de82ce141bed6a6313a ~ 140b63cb46f2855ac4ec8fba2f1e974a9c2974e8 -
Linux Linux 3.1 -

II. Public POCs for CVE-2026-45835

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III. Intelligence Information for CVE-2026-45835

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Patches & Fixes for CVE-2026-45835 (8)

Same Patch Batch · Linux · 2026-05-26 · 3 CVEs total

CVE-2026-45834 Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()
CVE-2026-45836 Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45835

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