CVE-2025-68785— 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push_nsh操作中未验证中间属性，可能导致无效内存访问。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | b2d0f5d5dc53532e6f07bc546a476a55ebdfe0f3< d0c135b8bbbcf92836068fd395bebeb7ae6c7bef |
affected |
b2d0f5d5dc53532e6f07bc546a476a55ebdfe0f3< 3bc2efff20a38b2c7ca18317649715df0dd62ced |
affected | ||
b2d0f5d5dc53532e6f07bc546a476a55ebdfe0f3< 1b569db9c2f28b599e40050524aae5f7332bc294 |
affected | ||
b2d0f5d5dc53532e6f07bc546a476a55ebdfe0f3< 10ffc558246f2c75619aedda0921906095e46702 |
affected | ||
b2d0f5d5dc53532e6f07bc546a476a55ebdfe0f3< 2ecfc4433acdb149eafd7fb22d7fd4adf90b25e9 |
affected | ||
b2d0f5d5dc53532e6f07bc546a476a55ebdfe0f3< c999153bfb2d1d9b295b7010d920f2a7c6d7595f |
affected | ||
b2d0f5d5dc53532e6f07bc546a476a55ebdfe0f3< 5ace7ef87f059d68b5f50837ef3e8a1a4870c36e |
affected | ||
4.15 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2025-68785 基础信息
漏洞信息
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Vulnerability Title
net: openvswitch: fix middle attribute validation in push_nsh() action
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: openvswitch: fix middle attribute validation in push_nsh() action
The push_nsh() action structure looks like this:
OVS_ACTION_ATTR_PUSH_NSH(OVS_KEY_ATTR_NSH(OVS_NSH_KEY_ATTR_BASE,...))
The outermost OVS_ACTION_ATTR_PUSH_NSH attribute is OK'ed by the
nla_for_each_nested() inside __ovs_nla_copy_actions(). The innermost
OVS_NSH_KEY_ATTR_BASE/MD1/MD2 are OK'ed by the nla_for_each_nested()
inside nsh_key_put_from_nlattr(). But nothing checks if the attribute
in the middle is OK. We don't even check that this attribute is the
OVS_KEY_ATTR_NSH. We just do a double unwrap with a pair of nla_data()
calls - first time directly while calling validate_push_nsh() and the
second time as part of the nla_for_each_nested() macro, which isn't
safe, potentially causing invalid memory access if the size of this
attribute is incorrect. The failure may not be noticed during
validation due to larger netlink buffer, but cause trouble later during
action execution where the buffer is allocated exactly to the size:
BUG: KASAN: slab-out-of-bounds in nsh_hdr_from_nlattr+0x1dd/0x6a0 [openvswitch]
Read of size 184 at addr ffff88816459a634 by task a.out/22624
CPU: 8 UID: 0 PID: 22624 6.18.0-rc7+ #115 PREEMPT(voluntary)
Call Trace:
<TASK>
dump_stack_lvl+0x51/0x70
print_address_description.constprop.0+0x2c/0x390
kasan_report+0xdd/0x110
kasan_check_range+0x35/0x1b0
__asan_memcpy+0x20/0x60
nsh_hdr_from_nlattr+0x1dd/0x6a0 [openvswitch]
push_nsh+0x82/0x120 [openvswitch]
do_execute_actions+0x1405/0x2840 [openvswitch]
ovs_execute_actions+0xd5/0x3b0 [openvswitch]
ovs_packet_cmd_execute+0x949/0xdb0 [openvswitch]
genl_family_rcv_msg_doit+0x1d6/0x2b0
genl_family_rcv_msg+0x336/0x580
genl_rcv_msg+0x9f/0x130
netlink_rcv_skb+0x11f/0x370
genl_rcv+0x24/0x40
netlink_unicast+0x73e/0xaa0
netlink_sendmsg+0x744/0xbf0
__sys_sendto+0x3d6/0x450
do_syscall_64+0x79/0x2c0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
</TASK>
Let's add some checks that the attribute is properly sized and it's
the only one attribute inside the action. Technically, there is no
real reason for OVS_KEY_ATTR_NSH to be there, as we know that we're
pushing an NSH header already, it just creates extra nesting, but
that's how uAPI works today. So, keeping as it is.
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:N/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push_nsh操作中未验证中间属性，可能导致无效内存访问。
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-2025-68785 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2026-01-13 · 共 93 条
| CVE-2025-68811 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68794 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71068 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68775 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68817 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68809 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71095 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71093 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68818 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71072 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68799 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68803 | 8.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71078 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68793 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68808 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68810 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71082 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68819 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68795 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71074 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 93 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-68785
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