CVE-2025-68340— 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team_port_add中设备类型更改不当，可能导致崩溃。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1d76efe1577b4323609b1bcbfafa8b731eda071a< f82d1fb65549de241fe312fcb2bcb8e0ad7b424d |
affected |
1d76efe1577b4323609b1bcbfafa8b731eda071a< c8b15b0d2eec3b5c7f585e5a53dfc8d36c818283 |
affected | ||
1d76efe1577b4323609b1bcbfafa8b731eda071a< a74ab1b532ecc5f9106621a8f75b4c3d04466b35 |
affected | ||
1d76efe1577b4323609b1bcbfafa8b731eda071a< e26235840fd961e4ebe5568f11a2a078cf726663 |
affected | ||
1d76efe1577b4323609b1bcbfafa8b731eda071a< 4040b5e8963982a00aa821300cb746efc9f2947e |
affected | ||
1d76efe1577b4323609b1bcbfafa8b731eda071a< e3eed4f038214494af62c7d2d64749e5108ce6ca |
affected | ||
1d76efe1577b4323609b1bcbfafa8b731eda071a< 0ae9cfc454ea5ead5f3ddbdfe2e70270d8e2c8ef |
affected | ||
3.7 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2025-68340 基础信息
漏洞信息
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Vulnerability Title
team: Move team device type change at the end of team_port_add
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
team: Move team device type change at the end of team_port_add
Attempting to add a port device that is already up will expectedly fail,
but not before modifying the team device header_ops.
In the case of the syzbot reproducer the gre0 device is
already in state UP when it attempts to add it as a
port device of team0, this fails but before that
header_ops->create of team0 is changed from eth_header to ipgre_header
in the call to team_dev_type_check_change.
Later when we end up in ipgre_header() struct ip_tunnel* points to nonsense
as the private data of the device still holds a struct team.
Example sequence of iproute2 commands to reproduce the hang/BUG():
ip link add dev team0 type team
ip link add dev gre0 type gre
ip link set dev gre0 up
ip link set dev gre0 master team0
ip link set dev team0 up
ping -I team0 1.1.1.1
Move team_dev_type_check_change down where all other checks have passed
as it changes the dev type with no way to restore it in case
one of the checks that follow it fail.
Also make sure to preserve the origial mtu assignment:
- If port_dev is not the same type as dev, dev takes mtu from port_dev
- If port_dev is the same type as dev, port_dev takes mtu from dev
This is done by adding a conditional before the call to dev_set_mtu
to prevent it from assigning port_dev->mtu = dev->mtu and instead
letting team_dev_type_check_change assign dev->mtu = port_dev->mtu.
The conditional is needed because the patch moves the call to
team_dev_type_check_change past dev_set_mtu.
Testing:
- team device driver in-tree selftests
- Add/remove various devices as slaves of team device
- syzbot
来源: 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
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team_port_add中设备类型更改不当，可能导致崩溃。
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-2025-68340 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-68340 补丁与修复 (1)
同批安全公告 · Linux · 2025-12-23 · 共 6 条
| CVE-2025-68341 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68343 | Linux kernel 安全漏洞 | |
| CVE-2025-68342 | Linux kernel 安全漏洞 | |
| CVE-2025-68339 | Linux kernel 安全漏洞 | |
| CVE-2025-68338 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2025-68340
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