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CVE-2022-3640— Linux Kernel Bluetooth l2cap_core.c l2cap_conn_del use after free

Quick assessment

Affected
Linux Kernel
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 存在资源管理错误漏洞，该漏洞源于内存释放后重用。

CVSS 5.5 · Medium EPSS 1.13% · P65

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2022-3640

Vulnerability Information
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Vulnerability Title
Linux Kernel Bluetooth l2cap_core.c l2cap_conn_del use after free
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as critical, was found in Linux Kernel. Affected is the function l2cap_conn_del of the file net/bluetooth/l2cap_core.c of the component Bluetooth. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211944.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 资源管理错误漏洞
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 存在资源管理错误漏洞，该漏洞源于内存释放后重用。
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 Kernel n/a -

II. Public POCs for CVE-2022-3640

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III. Intelligence Information for CVE-2022-3640

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Vendor Advisories for CVE-2022-3640 (1)

Mailing List Discussions for CVE-2022-3640 (4)

Same Patch Batch · Linux · 2022-10-21 · 11 CVEs total

CVE-2022-3635 5.5 MEDIUM Linux Kernel IPsec idt77252.c tst_timer use after free
CVE-2022-3636 5.5 MEDIUM Linux Kernel Ethernet mtk_ppe.c __mtk_ppe_check_skb use after free
CVE-2022-3625 4.6 MEDIUM Linux Kernel IPsec devlink.c devlink_param_get use after free
CVE-2022-3624 3.5 LOW Linux Kernel IPsec bond_alb.c rlb_arp_xmit memory leak
CVE-2022-3633 3.5 LOW Linux Kernel transport.c j1939_session_destroy memory leak
CVE-2022-3630 3.1 LOW Linux Kernel IPsec cookie.c memory leak
CVE-2022-3646 3.1 LOW Linux Kernel BPF segment.c nilfs_attach_log_writer memory leak
CVE-2022-3649 3.1 LOW Linux Kernel BPF inode.c nilfs_new_inode use after free
CVE-2022-3629 2.6 LOW Linux Kernel af_vsock.c vsock_connect memory leak
CVE-2022-3637 2.6 LOW Linux Kernel BlueZ jlink.c jlink_init denial of service

IV. Related Vulnerabilities

Same product: Kernel
Same vendor: Linux
Same weakness: CWE-119

V. Comments for CVE-2022-3640

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