CVE-2026-98360— RDMA/rxe 多播组成员插入漏洞
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。
在 Linux 内核中，已修复以下漏洞： RDMA/rxe：仅在 成功后才将多播组（mcg）插入 在通过 配置底层以太网多播地址之前，就将新分配的多播组发布到了 中，而 的执行过程不在 保护之下。当本地用户态 RDMA 客户端在 UD 类型队列对（QP）上调用 并命中此代码路径时，如果 随后返回错误（例如，当底层网络设备已被移除时返回 ，或传播自 的错误），清理逻辑会释放该已发布的组，但并未将其从树中移除。随后，对同一 MGID（多组标识符）的查找会通过 解引用已释放的 结构体，导致使用后释放（use-after-
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | a926a903b7dc39a8a949150258c09290998dd812< ddb43ac0926d4a931bc9b7744b93627f627457e5 |
affected |
a926a903b7dc39a8a949150258c09290998dd812< c79a789aa15180a1543b5db49c343d12e3ec214d |
affected | ||
a926a903b7dc39a8a949150258c09290998dd812< faae1fb4ccf8205806a8802c008798dabeb0205b |
affected | ||
a926a903b7dc39a8a949150258c09290998dd812< 02c0a2fa69c16248a7432af8a6d64ab2a73a5283 |
affected | ||
a926a903b7dc39a8a949150258c09290998dd812< d4fc4e37f8a143b0fe83b42c8fb48cf542154fee |
affected | ||
a926a903b7dc39a8a949150258c09290998dd812< 1caceeb2d74bbe88223aea55eb8626b4c5f076fd |
affected | ||
5.18 |
affected | ||
< 5.18 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2026-98360 基础信息
漏洞信息
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Vulnerability Title
RDMA/rxe: insert mcg into mcg_tree only after rxe_mcast_add() succeeds
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: insert mcg into mcg_tree only after rxe_mcast_add() succeeds
rxe_get_mcg() publishes a newly allocated multicast group in
rxe->mcg_tree before programming the backing Ethernet multicast address
with rxe_mcast_add(), which runs outside mcg_lock. A local userspace
RDMA client reaches this path with ATTACH_MCAST on a UD QP; if
rxe_mcast_add() then returns an error (for example -ENODEV when the
backing netdev has been removed, or a propagated dev_mc_add() error),
the unwind frees the published group without removing it from the tree.
A later lookup of the same MGID dereferences the freed struct rxe_mcg
from __rxe_lookup_mcg().
Fix this by keeping the new mcg private until rxe_mcast_add() succeeds.
Split the tree publication into __rxe_publish_mcg(), call rxe_mcast_add()
before taking the tree reference, and free the still-private mcg on
failure. Because the group is never visible in mcg_tree until the
multicast address is programmed, no concurrent caller can look it up or
attach a QP to a group that is about to be torn down, so the error path
needs no conditional unwind. If another caller publishes the same MGID
while the address is being programmed, the post-add re-check under
mcg_lock finds the winner; this caller then drops its private object and
balances its own rxe_mcast_add() with rxe_mcast_del() before returning
the winner.
Reproduced by forcing the rxe_mcast_add() error return under KASAN:
without the change the next attach to the same MGID reports a
slab-use-after-free in __rxe_lookup_mcg(); with it the forced failure
returns cleanly. A no-injection attach/detach regression, including a
two-QP shared join/leave and re-attach, stays KASAN- and leak-clean.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/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
受影响产品
二、漏洞 CVE-2026-98360 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-98360 补丁与修复 (6)
同批安全公告 · Linux · 2026-10-06 · 共 208 条
| CVE-2026-98323 | 9.8 CRITICAL | RDMA/siw 分片头拷贝边界漏洞 |
| CVE-2026-98365 | 9.8 CRITICAL | RDMA/rxe mr_check_range() 整数溢出导致越界访问漏洞 |
| CVE-2026-98282 | 8.8 HIGH | PowerPC IOMMU iommu_tce_check_ioba 溢出验证修复 |
| CVE-2026-98283 | 8.8 HIGH | KVM: PPC Book3S HV tlbie_all_lpid 使用后释放漏洞 |
| CVE-2026-98339 | 8.8 HIGH | cfg80211 移除过时条目时过滤BSS类型漏洞 |
| CVE-2026-98171 | 8.8 HIGH | smb 客户端修复复合 PDU 中 next_buffer UAF 及 NextCommand 越界漏洞 |
| CVE-2026-98261 | 8.1 HIGH | CIFS 服务器 cifs_chan_skip_or_disable() 函数中的使用后释放漏洞 |
| CVE-2026-98357 | 8.1 HIGH | IB/isert 释放连接前等待控制PDU完成漏洞 |
| CVE-2026-98239 | 8.1 HIGH | lan743x 网卡 RX 校验和使用后释放漏洞 |
| CVE-2026-98341 | 7.8 HIGH | WiFi: cfg80211驱动扫描请求释放漏洞 |
| CVE-2026-98281 | 7.8 HIGH | futex vfork时私有哈希分配漏洞 |
| CVE-2026-98324 | 7.8 HIGH | DMA引擎 pxa 硬件描述符重复计数漏洞 |
| CVE-2026-98320 | 7.8 HIGH | netfilter flowtable 在流释放前持有 ct 引用漏洞 |
| CVE-2026-98228 | 7.8 HIGH | MIPS EQE4 系统内核配置错误 |
| CVE-2026-98229 | 7.8 HIGH | Linux内核xfrm安全路径重置前保存输入状态数据 |
| CVE-2026-98318 | 7.8 HIGH | SMB客户端修复相对原生符号链接目标验证漏洞 |
| CVE-2026-98315 | 7.8 HIGH | NTFS运行列表更新缺少锁保护 |
| CVE-2026-98260 | 7.8 HIGH | exec 清理 POSIX 定时器漏洞 |
| CVE-2026-98256 | 7.8 HIGH | Signal 执行函数竞争条件漏洞 |
| CVE-2026-98258 | 7.8 HIGH | Linux内核posix-cpu-timers释放过期列表定时器漏洞 |
显示前 20 条，共 208 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-98360
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