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CVE-2024-56605— Bluetooth: L2CAP: do not leave dangling sk pointer on error in l2cap_sock_create()

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Bluetooth L2CAP协议中错误处理后留下的悬挂sk指针问题。

CVSS 7.8 · High EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 49dfbb9129c4edb318578de35cc45c555df37884< f6ad641646b67f29c7578dcd6c25813c7dcbf51e affected
49dfbb9129c4edb318578de35cc45c555df37884< daa13175a6dea312a76099066cb4cbd4fc959a84 affected
49dfbb9129c4edb318578de35cc45c555df37884< a8677028dd5123e5e525b8195483994d87123de4 affected
49dfbb9129c4edb318578de35cc45c555df37884< bb2f2342a6ddf7c04f9aefbbfe86104cd138e629 affected
49dfbb9129c4edb318578de35cc45c555df37884< 8ad09ddc63ace3950ac43db6fbfe25b40f589dd6 affected
49dfbb9129c4edb318578de35cc45c555df37884< 61686abc2f3c2c67822aa23ce6f160467ec83d35 affected
49dfbb9129c4edb318578de35cc45c555df37884< 7c4f78cdb8e7501e9f92d291a7d956591bf73be9 affected
3.6 affected
… +8 more rows
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I. Basic Information for CVE-2024-56605

Vulnerability Information
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Vulnerability Title
Bluetooth: L2CAP: do not leave dangling sk pointer on error in l2cap_sock_create()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: do not leave dangling sk pointer on error in l2cap_sock_create() bt_sock_alloc() allocates the sk object and attaches it to the provided sock object. On error l2cap_sock_alloc() frees the sk object, but the dangling pointer is still attached to the sock object, which may create use-after-free in other code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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Bluetooth L2CAP协议中错误处理后留下的悬挂sk指针问题。
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 49dfbb9129c4edb318578de35cc45c555df37884 ~ f6ad641646b67f29c7578dcd6c25813c7dcbf51e -
Linux Linux 3.6 -

II. Public POCs for CVE-2024-56605

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III. Intelligence Information for CVE-2024-56605

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Patches & Fixes for CVE-2024-56605 (7)

Same Patch Batch · Linux · 2024-12-27 · 221 CVEs total

CVE-2024-56640 9.8 CRITICAL net/smc: fix LGR and link use-after-free issue
CVE-2024-56645 9.8 CRITICAL can: j1939: j1939_session_new(): fix skb reference counting
CVE-2024-53169 9.8 CRITICAL nvme-fabrics: fix kernel crash while shutting down controller
CVE-2024-53209 9.8 CRITICAL bnxt_en: Fix receive ring space parameters when XDP is active
CVE-2024-53206 9.8 CRITICAL tcp: Fix use-after-free of nreq in reqsk_timer_handler().
CVE-2024-56656 9.8 CRITICAL bnxt_en: Fix aggregation ID mask to prevent oops on 5760X chips
CVE-2024-53186 9.8 CRITICAL ksmbd: fix use-after-free in SMB request handling
CVE-2024-53176 9.8 CRITICAL smb: During unmount, ensure all cached dir instances drop their dentry
CVE-2024-53177 9.8 CRITICAL smb: prevent use-after-free due to open_cached_dir error paths
CVE-2024-53179 9.8 CRITICAL smb: client: fix use-after-free of signing key
CVE-2024-56591 8.8 HIGH Bluetooth: hci_conn: Use disable_delayed_work_sync
CVE-2024-56626 8.8 HIGH ksmbd: fix Out-of-Bounds Write in ksmbd_vfs_stream_write
CVE-2024-53237 8.8 HIGH Bluetooth: fix use-after-free in device_for_each_child()
CVE-2024-53224 8.8 HIGH RDMA/mlx5: Move events notifier registration to be after device registration
CVE-2024-56651 8.8 HIGH can: hi311x: hi3110_can_ist(): fix potential use-after-free
CVE-2024-56653 8.8 HIGH Bluetooth: btmtk: avoid UAF in btmtk_process_coredump
CVE-2024-56669 8.8 HIGH iommu/vt-d: Remove cache tags before disabling ATS
CVE-2024-56627 8.1 HIGH ksmbd: fix Out-of-Bounds Read in ksmbd_vfs_stream_read
CVE-2024-53232 7.8 HIGH iommu/s390: Implement blocking domain
CVE-2024-56635 7.8 HIGH net: avoid potential UAF in default_operstate()

Showing top 20 of 221 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56605

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