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CVE-2026-53071— Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.7版本存在安全漏洞，该漏洞源于缺少chan锁，可能导致远程BLE设备发送特制L2CAP ECRED重配置响应，在另一个线程迭代通道列表时破坏通道列表。

CVSS 8.8 · High EPSS 0.43% · P36

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 15f02b91056253e8cdc592888f431da0731337b8< 96dca51715d86559ed6ed8028e5445cecb80f3ae affected
15f02b91056253e8cdc592888f431da0731337b8< 330b20ec97916961ee0e6c29c06bc0fa7c96e64c affected
15f02b91056253e8cdc592888f431da0731337b8< 0ccd75c51f620374086f359e906917676e699a1c affected
15f02b91056253e8cdc592888f431da0731337b8< 77a853aec710b2fdf41fa298ea3cbc9a4358f917 affected
15f02b91056253e8cdc592888f431da0731337b8< fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 affected
15f02b91056253e8cdc592888f431da0731337b8< dc89961b76f12aff47124c1df4bdb32a080f4d0c affected
15f02b91056253e8cdc592888f431da0731337b8< 5501d055a1ce3c747141e3955ba8cf034d193f3e affected
15f02b91056253e8cdc592888f431da0731337b8< 42776497cdbc9a665b384a6dcb85f0d4bd927eab affected
… +10 more rows
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I. Basic Information for CVE-2026-53071

Vulnerability Information
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Vulnerability Title
Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it. Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/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基金会开源的操作系统Linux所使用的内核。 Linux kernel 5.7版本存在安全漏洞，该漏洞源于缺少chan锁，可能导致远程BLE设备发送特制L2CAP ECRED重配置响应，在另一个线程迭代通道列表时破坏通道列表。
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 15f02b91056253e8cdc592888f431da0731337b8 ~ 96dca51715d86559ed6ed8028e5445cecb80f3ae -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-53071

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III. Intelligence Information for CVE-2026-53071

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Patches & Fixes for CVE-2026-53071 (7)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-53045 9.8 CRITICAL memory: tegra124-emc: Fix dll_change check
CVE-2026-53010 9.8 CRITICAL ksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-53088 9.8 CRITICAL net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-53006 9.8 CRITICAL ipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-53002 9.8 CRITICAL netfilter: conntrack: remove sprintf usage
CVE-2026-53086 9.8 CRITICAL net: bcmgenet: fix racing timeout handler
CVE-2026-52993 9.8 CRITICAL tipc: fix double-free in tipc_buf_append()
CVE-2026-52989 9.8 CRITICAL nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-52986 9.8 CRITICAL netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-52982 9.8 CRITICAL net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-52955 9.8 CRITICAL libceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-53046 9.8 CRITICAL ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-53049 9.8 CRITICAL gfs2: add some missing log locking
CVE-2026-53055 9.8 CRITICAL crypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-52924 9.8 CRITICAL sctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-52931 9.8 CRITICAL batman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-52914 9.8 CRITICAL batman-adv: fix fragment reassembly length accounting
CVE-2026-53043 9.1 CRITICAL ocfs2/dlm: validate qr_numregions in dlm_match_regions()
CVE-2026-52999 9.1 CRITICAL netfilter: nfnetlink_osf: fix out-of-bounds read on option matching
CVE-2026-52958 9.1 CRITICAL libceph: Fix potential out-of-bounds access in osdmap_decode()

Showing top 20 of 219 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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