CVE-2025-38185— 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，该漏洞源于无效长度skb未释放，可能导致内存泄漏。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c19c0943424b412a84fdf178e6c71fe5480e4f0f |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a4b0fd8c25a7583f8564af6cc910418fb8954e89 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1b0ad18704913c92a3ad53748fbc0f219a75b876 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ca00f0e6d733ecd9150716d1fd0138d26e674706 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3261c017a7c5d2815c6a388c5a3280d1fba0e8db |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< e996507f59610e5752b8702537f13f551e7a2c96 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c9260c837de1d2b454960a4a2e44a81272fbcd22 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2f370ae1fb6317985f3497b1bb80d457508ca2f7 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-38185 基础信息
漏洞信息
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Vulnerability Title
atm: atmtcp: Free invalid length skb in atmtcp_c_send().
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
atm: atmtcp: Free invalid length skb in atmtcp_c_send().
syzbot reported the splat below. [0]
vcc_sendmsg() copies data passed from userspace to skb and passes
it to vcc->dev->ops->send().
atmtcp_c_send() accesses skb->data as struct atmtcp_hdr after
checking if skb->len is 0, but it's not enough.
Also, when skb->len == 0, skb and sk (vcc) were leaked because
dev_kfree_skb() is not called and sk_wmem_alloc adjustment is missing
to revert atm_account_tx() in vcc_sendmsg(), which is expected
to be done in atm_pop_raw().
Let's properly free skb with an invalid length in atmtcp_c_send().
[0]:
BUG: KMSAN: uninit-value in atmtcp_c_send+0x255/0xed0 drivers/atm/atmtcp.c:294
atmtcp_c_send+0x255/0xed0 drivers/atm/atmtcp.c:294
vcc_sendmsg+0xd7c/0xff0 net/atm/common.c:644
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x330/0x3d0 net/socket.c:727
____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566
___sys_sendmsg+0x271/0x3b0 net/socket.c:2620
__sys_sendmsg net/socket.c:2652 [inline]
__do_sys_sendmsg net/socket.c:2657 [inline]
__se_sys_sendmsg net/socket.c:2655 [inline]
__x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655
x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was created at:
slab_post_alloc_hook mm/slub.c:4154 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4249
kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:579
__alloc_skb+0x347/0x7d0 net/core/skbuff.c:670
alloc_skb include/linux/skbuff.h:1336 [inline]
vcc_sendmsg+0xb40/0xff0 net/atm/common.c:628
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x330/0x3d0 net/socket.c:727
____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566
___sys_sendmsg+0x271/0x3b0 net/socket.c:2620
__sys_sendmsg net/socket.c:2652 [inline]
__do_sys_sendmsg net/socket.c:2657 [inline]
__se_sys_sendmsg net/socket.c:2655 [inline]
__x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655
x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 1 UID: 0 PID: 5798 Comm: syz-executor192 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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，该漏洞源于无效长度skb未释放，可能导致内存泄漏。
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-2025-38185 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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同批安全公告 · Linux · 2025-07-04 · 共 59 条
| CVE-2025-38209 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38211 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38174 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38216 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38233 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38230 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38227 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38226 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38224 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38218 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38232 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38212 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38175 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38234 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38206 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38204 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38192 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38187 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38180 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38189 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 59 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-38185
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