CVE-2026-72333— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于蓝牙L2CAP中无响应命令的tx标识符泄漏，导致标识符耗尽，可能造成通道永久停滞。
影响版本矩阵 17
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | e86554c37d3d2b4b24608e0313f882cae28b8adb< b8a32a5fc915b024c60f18d51b6cffd2bd64d4a6 |
affected |
9b24ad4787cad46a3917620799f8455c6533b8df< bd1e01170341291292fd4c46b5f6949da282ca6c |
affected | ||
ea6cf86167b3972caa68972d2a1ad43ecbbb8331< 0c602cb8f148a36bfb39c25ade400bdadc023c4f |
affected | ||
6c3ea155e5ee3e56606233acde8309afda66d483< d0a2b0c81f112540a337cde1c20251bf05ddf1da |
affected | ||
6c3ea155e5ee3e56606233acde8309afda66d483< 6e1930ece855a4c256f1c7e6632d634cfb9888b5 |
affected | ||
ed97bb2cf96684ee646be6f37e4c4835f9d30caa |
affected | ||
84bc3197f7d87c5b89c156e853d0561a9154eceb |
affected | ||
8c1cdbc1bacc0cf9c27c3ebda11a81c3dcd01630 |
affected | ||
| … +9 条更多 | |||
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一、 漏洞 CVE-2026-72333 基础信息
漏洞信息
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Vulnerability Title
Bluetooth: L2CAP: fix tx ident leak for commands without a response
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: fix tx ident leak for commands without a response
Commit 6c3ea155e5ee ("Bluetooth: L2CAP: Fix not tracking outstanding
TX ident") changed ident allocation to use an IDA, releasing idents in
l2cap_put_ident() when the matching response command is received.
But identifiers allocated for commands that have no response defined
are never released. In particular L2CAP_LE_CREDITS is sent repeatedly for
the lifetime of an LE CoC channel, so a peer streaming data to the
host exhausts the 1-255 ident range after 254 credit packets. From
then on l2cap_get_ident() fails:
kernel: Bluetooth: Unable to allocate ident: -28
and every subsequent L2CAP_LE_CREDITS packet is sent with ident 0,
which is invalid (Core Spec, Vol 3, Part A, Section 4: "Signaling
identifier 0x00 is an invalid identifier and shall never be used in
any command"). Remote stacks that validate the ident drop these
commands, never receive new credits, and the channel stalls
permanently. With default socket buffers this happens after roughly 0.5 MB
of received data (the exact amount depends on the socket receive buffer):
< ACL Data TX: Handle 2048 flags 0x00 dlen 12
LE L2CAP: LE Flow Control Credit (0x16) ident 0 len 4
Source CID: 64
Credits: 1
Release the ident immediately after sending L2CAP_LE_CREDITS since no
response will ever release it. Use a local variable instead of
chan->ident so that an ident that an EXT_FLOWCTL channel may be waiting on
(e.g. a pending reconfigure) is not overwritten by a credit packet.
Also add the missing L2CAP_LE_CONN_RSP case to l2cap_put_ident() so
idents allocated for outgoing L2CAP_LE_CONN_REQ commands are released
when the response arrives.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于蓝牙L2CAP中无响应命令的tx标识符泄漏，导致标识符耗尽，可能造成通道永久停滞。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-72333 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-72333 补丁与修复 (4)
同批安全公告 · Linux · 2026-08-15 · 共 845 条
| CVE-2026-74475 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74280 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74279 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72407 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72408 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74309 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72421 | 10.0 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72493 | 9.9 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72463 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72248 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72381 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72477 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72473 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72472 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74406 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72222 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72226 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72137 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-74376 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-72130 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 845 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-72333
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