CVE-2026-98852— 网络 IPv6 隧道包扩展头检测
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。
在 Linux 内核中，以下漏洞已得到修复： 网络子系统：扩展对隧道化数据包 IPv6 扩展头的检测 提交 c4336a07eb6b（"net: 在 IPV6_CSUM GSO 回退时正确处理隧道化流量”）将 函数拆分为基于 的互斥分支。然而，该修改尚未覆盖所有路径： 1. 当 被设置时，外层头部未被检查。像 和 这样的 IPv6 隧道默认会添加外层目标选项头（encap_limit）。其 GSO 数据包会跳过软件 GSO 处理，随后 检测到外层扩展头，并调用 处理该 GSO 数据包，导致警告并丢弃该包。 2. 某
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 33670f780e0120c3dacda188c512bbffe0b6044c< 44ba9dc568c878b699d05e7cf699572dc9df4b59 |
affected |
a98b78116a27e2a57b696b569b2cb431c95cf9b6< aa480f05aed7a9eee87d4a6fc90647fe9679c670 |
affected | ||
c4336a07eb6b2526dc2b62928b5104b41a7f81f5< cabacdf98e09eb74599c4d97d7bd7fd659598fb7 |
affected | ||
c4336a07eb6b2526dc2b62928b5104b41a7f81f5< 5f0764cb1c81a9712bce605d38efe6d844a70b29 |
affected | ||
2094a7cf91b71367b649f991aacc7b579f793d0b |
affected | ||
ed71cf465c75f5688b07a35d373cd1d6b589c8ea |
affected | ||
732fdeb2987c94b439d51f5cb9addddc2fc48c42 |
affected | ||
6.12.81< 6.12.113 |
affected | ||
| … +10 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-98852 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
net: extend IPv6 exthdr detection of tunneled packets
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: extend IPv6 exthdr detection of tunneled packets
Commit c4336a07eb6b ("net: correctly handle tunneled traffic on IPV6_CSUM
GSO fallback") split skb_gso_has_extension_hdr() into mutually exclusive
branches on skb->encapsulation. This did not yet address all paths:
1. With skb->encapsulation set, the outer header is not checked. IPv6
tunnels such as ip6_gre and ip6_tunnel add an outer Destination
Options header by default (encap_limit). Their GSO packets skip
software GSO, then skb_csum_hwoffload_help() sees the outer extension
header and calls skb_checksum_help() on the GSO skb, which warns and
drops it.
2. Tunnels over IPv6 without an outer transport header, such as
ip6_tunnel, leave skb->transport_header at the inner transport
header. skb_network_header_len() then spans the outer IPv6, tunnel
and inner IP headers, a false positive.
3. UDP tunnels without an inner network header, such as SCTP-in-UDP or
PSP, have no inner IPv6 header to check. Decide on the outer header
alone.
4. Directly dereferencing inner_ip_hdr(skb)->version without
skb_header_pointer() is unsafe.
Instead, check ipv6_ext_hdr(nexthdr) on the outer IPv6 header and, if
set, on the inner IPv6 header. Read the headers with skb_header_pointer().
Keep the skb_network_header_len() check when !skb->encapsulation to also
catch encapsulated packets without skb->encapsulation (e.g., virtio).
Use the same helper in skb_csum_hwoffload_help(). Its open coded test
has the false positive of (2) and ignores the inner header.
Background: checksum offload of tunneled packets invariants:
Non-GSO skb:
- If the inner packet is CHECKSUM_PARTIAL, Local Checksum Offload computes
the outer checksum in software and the device offloads only the inner L4
checksum.
- If the inner packet is CHECKSUM_NONE (e.g., SCTP-in-UDP, ESP-in-UDP,
Remote Checksum Offload), the device offloads the outer UDP or GRE
checksum instead.
GSO skb:
- A device with NETIF_F_GSO_UDP_TUNNEL_CSUM or NETIF_F_GSO_GRE_CSUM
computes both inner and outer checksums per segment.
The outer checksum is seeded with only the pseudo-header checksum.
A NETIF_F_IPV6_CSUM device must parse through the outer headers to
reach the inner ones.
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
受影响产品
二、漏洞 CVE-2026-98852 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-98852 的情报信息
请登录查看更多情报信息。
CVE-2026-98852 补丁与修复 (2)
同批安全公告 · Linux · 2026-10-18 · 共 436 条
| CVE-2026-98582 | ST21NFCA NFC 驱动接收帧大小验证漏洞 | |
| CVE-2026-98568 | Linux vxlan 邻居回复内存使用漏洞 | |
| CVE-2026-98570 | Linux IPv6 子网路由表项处理信息泄露漏洞 | |
| CVE-2026-98571 | stmmac 驱动 skb 构建失败后内存泄漏漏洞 | |
| CVE-2026-98572 | bpf MIPS32 JEQ/JNE 跳转指令逻辑漏洞 | |
| CVE-2026-98573 | Linux 内核 IPv6 校验和计算整数下溢漏洞 | |
| CVE-2026-98574 | bcmgenet 网络驱动 NAPI 停止前禁用队列漏洞 | |
| CVE-2026-98575 | pn533 NFC 驱动越界读取漏洞 | |
| CVE-2026-98576 | Linux NFC LLCP 服务名日志越界读漏洞 | |
| CVE-2026-98577 | NFC LLCP 模块 WKS SAP 劫持漏洞 | |
| CVE-2026-98578 | Linux st21nfca ISO15693 库存长度验证漏洞 | |
| CVE-2026-98579 | NFC LLCP SDreq TLV 列表泄露漏洞 | |
| CVE-2026-98580 | Linux NFC LLCP 接受队列生命周期竞态条件漏洞 | |
| CVE-2026-98581 | NFC LLCP nfc_llcp_recv_dm 列表损坏/引用计数不同步 | |
| CVE-2026-98593 | Linux s390 调试功能空指针解引用漏洞 | |
| CVE-2026-98590 | bpf 上下文代码生成逻辑修复 | |
| CVE-2026-98591 | bpf skb 动态指针越界漏洞 | |
| CVE-2026-98592 | Spacemit 网络驱动传输描述符处理漏洞 | |
| CVE-2026-98589 | bpf 子程序拒绝 pkt 参数 | |
| CVE-2026-98594 | tg3 驱动 PHYLIB 资源清理漏洞 |
显示前 20 条，共 436 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-98852
暂无评论