CVE-2025-68813— 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，该漏洞源于在路由错误路径中未设置skb->dev，可能导致空指针取消引用。
可能的 ATT&CK 技术 1 AI
T1498 · Network Denial of Service影响版本矩阵 28
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | ed0de45a1008991fdaa27a0152befcb74d126a8b< dd72a93c80408f06327dd2d956eb1a656d0b5903 |
affected |
ed0de45a1008991fdaa27a0152befcb74d126a8b< 312d7cd88882fc6cadcc08b02287497aaaf94bcd |
affected | ||
ed0de45a1008991fdaa27a0152befcb74d126a8b< cdeff10851c37a002d87a035818ebd60fdb74447 |
affected | ||
ed0de45a1008991fdaa27a0152befcb74d126a8b< 4729ff0581fbb7ad098b6153b76b6f5aac94618a |
affected | ||
ed0de45a1008991fdaa27a0152befcb74d126a8b< 25ab24df31f7af843c96a38e0781b9165216e1a8 |
affected | ||
ed0de45a1008991fdaa27a0152befcb74d126a8b< 689a627d14788ad772e0fa24c2e57a23dbc7ce90 |
affected | ||
ed0de45a1008991fdaa27a0152befcb74d126a8b< ad891bb3d079a46a821bf2b8867854645191bab0 |
affected | ||
6c2fa855d8178699706b1192db2f1f8102b0ba1e |
affected | ||
| … +20 条更多 | |||
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一、 漏洞 CVE-2025-68813 基础信息
漏洞信息
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Vulnerability Title
ipvs: fix ipv4 null-ptr-deref in route error path
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ipvs: fix ipv4 null-ptr-deref in route error path
The IPv4 code path in __ip_vs_get_out_rt() calls dst_link_failure()
without ensuring skb->dev is set, leading to a NULL pointer dereference
in fib_compute_spec_dst() when ipv4_link_failure() attempts to send
ICMP destination unreachable messages.
The issue emerged after commit ed0de45a1008 ("ipv4: recompile ip options
in ipv4_link_failure") started calling __ip_options_compile() from
ipv4_link_failure(). This code path eventually calls fib_compute_spec_dst()
which dereferences skb->dev. An attempt was made to fix the NULL skb->dev
dereference in commit 0113d9c9d1cc ("ipv4: fix null-deref in
ipv4_link_failure"), but it only addressed the immediate dev_net(skb->dev)
dereference by using a fallback device. The fix was incomplete because
fib_compute_spec_dst() later in the call chain still accesses skb->dev
directly, which remains NULL when IPVS calls dst_link_failure().
The crash occurs when:
1. IPVS processes a packet in NAT mode with a misconfigured destination
2. Route lookup fails in __ip_vs_get_out_rt() before establishing a route
3. The error path calls dst_link_failure(skb) with skb->dev == NULL
4. ipv4_link_failure() → ipv4_send_dest_unreach() →
__ip_options_compile() → fib_compute_spec_dst()
5. fib_compute_spec_dst() dereferences NULL skb->dev
Apply the same fix used for IPv6 in commit 326bf17ea5d4 ("ipvs: fix
ipv6 route unreach panic"): set skb->dev from skb_dst(skb)->dev before
calling dst_link_failure().
KASAN: null-ptr-deref in range [0x0000000000000328-0x000000000000032f]
CPU: 1 PID: 12732 Comm: syz.1.3469 Not tainted 6.6.114 #2
RIP: 0010:__in_dev_get_rcu include/linux/inetdevice.h:233
RIP: 0010:fib_compute_spec_dst+0x17a/0x9f0 net/ipv4/fib_frontend.c:285
Call Trace:
<TASK>
spec_dst_fill net/ipv4/ip_options.c:232
spec_dst_fill net/ipv4/ip_options.c:229
__ip_options_compile+0x13a1/0x17d0 net/ipv4/ip_options.c:330
ipv4_send_dest_unreach net/ipv4/route.c:1252
ipv4_link_failure+0x702/0xb80 net/ipv4/route.c:1265
dst_link_failure include/net/dst.h:437
__ip_vs_get_out_rt+0x15fd/0x19e0 net/netfilter/ipvs/ip_vs_xmit.c:412
ip_vs_nat_xmit+0x1d8/0xc80 net/netfilter/ipvs/ip_vs_xmit.c:764
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，该漏洞源于在路由错误路径中未设置skb->dev，可能导致空指针取消引用。
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-2025-68813 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-2025-68794 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68811 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68817 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68775 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71068 | 9.8 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-2025-68809 | 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-2025-68792 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68801 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68800 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68815 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68808 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68795 | 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 |
显示前 20 条，共 93 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-68813
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