CVE-2026-90413— IB/isert 登录PDU数据长度校验漏洞
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，已解决以下漏洞： IB/isert：拒绝声明数据量超过实际接收量的登录 PDU 会记录 HCA（主机通道适配器）实际写入登录缓冲区的字节数，但没有任何代码将其与登录 PDU 头部（BHS）中声明的长度进行比对。 会将 字节拷贝到 ，而后续登录处理代码会直接从该缓冲区中读取声明的长度。 对于第一个登录 PDU，在 中： 对于后续的登录 PDU，在 （通过 调用）中执行类似操作。 是固定大小的 （8192 字节）分配空间。如果一个发起端（initiator）声明的长度大于其实际发送的数据量，代码
可能的 ATT&CK 技术 1 AI
T1005 · Data from Local System影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | b8d26b3be8b33682cf163274ed07479a70554633< b1f3313e7b3e396e4985fea5c709477387e0a065 |
affected |
b8d26b3be8b33682cf163274ed07479a70554633< 228aaa620fe6a7bc8b5b21dd348b4836b1760c61 |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 0d9c0586af703890afe1bd0cfe641e3a3af1c32d |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 44fe800ec13386c88bd5b32bcd1deaa1e17535d5 |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 71ec8bbfa4a183f1e623662f9cfbcd702e433bdb |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< c345d9d0b3eefc990bb90cf565325785aab06aab |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 48812c8103071d550d9ab4a3431be5bdc52255bc |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 2488b5b4827e5415768afc8daf097e8eb83c98df |
affected | ||
| … +10 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-90413 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
IB/isert: reject login PDUs declaring more data than was received
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
IB/isert: reject login PDUs declaring more data than was received
isert_login_recv_done() records how many bytes the HCA actually placed in
the login buffer, but nothing compares that against the length the login
PDU's BHS declares. isert_rx_login_req() copies min(login_req_len,
MAX_KEY_VALUE_PAIRS) bytes into login->req_buf, and the login code then
reads the declared length back out of that buffer - for the first PDU in
iscsi_target_locate_portal(),
payload_length = ntoh24(login_req->dlength);
tmpbuf = kmemdup_nul(login->req_buf, payload_length, GFP_KERNEL);
and for the ones after it in iscsi_decode_text_input(), reached from
iscsi_target_do_login().
login->req_buf is a fixed MAX_KEY_VALUE_PAIRS (8192) byte allocation, so
an initiator that declares more than it sends reads off the end of it,
before authentication and with the length under its control:
BUG: KASAN: slab-out-of-bounds in kmemdup_nul+0x43/0x80
Read of size 8193 at addr ffff8881056a8000 by task iscsi_np/167
__asan_memcpy+0x23/0x60
kmemdup_nul+0x43/0x80
iscsi_target_locate_portal+0x48d/0x1180
iscsi_target_login_thread+0x19a9/0x3350
Allocated by task 167:
__kmalloc_cache_noprof+0x158/0x370
iscsi_target_login_thread+0x971/0x3350
which belongs to the cache kmalloc-8k of size 8192
allocated 8192-byte region
Falsifying the second login PDU instead reaches the other reader, on the
same buffer:
BUG: KASAN: slab-out-of-bounds in kmemdup_nul+0x43/0x80
Read of size 8193 at addr ffff888104d10000 by task kworker/1:1/50
Workqueue: isert_login_wq iscsi_target_do_login_rx
__asan_memcpy+0x23/0x60
kmemdup_nul+0x43/0x80
iscsi_decode_text_input+0xc6/0x11c0
iscsi_target_do_login+0x261/0x1470
iscsi_target_do_login_rx+0x51d/0x7d0
iscsit over TCP is not exposed: iscsit_get_login_rx() validates the
declared length with iscsi_target_check_login_request() and then reads
exactly that many bytes off the socket, so the declared length governs
how much arrives rather than how much is copied out of an already-filled
buffer. isert does not call iscsi_target_check_login_request() at all.
Reject a login PDU whose declared DataSegmentLength exceeds what was
received, in both paths that reach isert_rx_login_req():
isert_get_login_rx() for the first login PDU and isert_login_recv_done()
for the ones after it. dlength <= login_req_len is allowed because the
received count can include up to three bytes of iSCSI padding.
Once the check is in place the copy out can no longer exceed the copy in:
the posted login SGE is ISER_RX_PAYLOAD_SIZE, so login_req_len cannot
exceed MAX_KEY_VALUE_PAIRS and the min() in isert_rx_login_req() is
login_req_len.
Like the existing short-PDU check added by 29e7b925ae6d, the reject in
isert_login_recv_done() returns without completing login_req_comp, so a
malformed subsequent PDU leaves the login to be torn down by the login
timer rather than failing immediately. The first-PDU path returns an
error and fails straight away.
Reproduced on 7.2.0-rc4 with soft-RoCE (rdma_rxe) under KASAN, using an
initiator that sends the real key=value payload while declaring 8193 in
the BHS, on the first login PDU and on the second in separate runs. The
reported read size tracks the declared value exactly; 16384 and 61440
behave the same. Unpatched 3 of 3 runs report on each of the two paths,
patched 0 of 3 on both, run alternately in a single session, and a normal
login still completes on the patched build.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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
受影响产品
二、漏洞 CVE-2026-90413 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-2026-90413 的情报信息
请登录查看更多情报信息。
CVE-2026-90413 补丁与修复 (8)
同批安全公告 · Linux · 2026-09-17 · 共 600 条
| CVE-2026-92489 | 9.8 CRITICAL | Linux内核 xfrm 双重释放漏洞 |
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1 解码前未清空调用列表 |
| CVE-2026-90173 | 9.8 CRITICAL | SMB SmbDirect 释放完成队列漏洞 |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4客户端分配失败回调处理漏洞 |
| CVE-2026-90235 | 9.8 CRITICAL | 内核sunrpc xprtsock并发读取修复 |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer 随机化RB树节点比较 |
| CVE-2026-90230 | 9.1 CRITICAL | Linux内核Nvme-target堆越界读取漏洞 |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert拒绝声明超出实际接收数据的PDU |
| CVE-2026-90381 | 8.8 HIGH | Linux内核mt76驱动无线信道切换漏洞 |
| CVE-2026-93189 | 8.8 HIGH | Linux HID核心使用已释放内存漏洞 |
| CVE-2026-90329 | 8.8 HIGH | Linux 内核 HID 驱动探测清理同步漏洞 |
| CVE-2026-90256 | 8.8 HIGH | Linux Bluetooth L2CAP 远程代码执行漏洞 |
| CVE-2026-90357 | 8.8 HIGH | mt76驱动MT7915无线局域网远程拒绝服务漏洞 |
| CVE-2026-90255 | 8.8 HIGH | Linux内核 Bluetooth 漏洞 |
| CVE-2026-90367 | 8.8 HIGH | Linux内核MT7996驱动死锁漏洞 |
| CVE-2026-90286 | 8.8 HIGH | AMDGPU GFX6 计算队列PFP使用漏洞 |
| CVE-2026-90240 | 8.8 HIGH | Linux内核 IOMMU 别名拆除时刷新缓存错误 |
| CVE-2026-90380 | 8.8 HIGH | MT76驱动 mt792x 使用释放后内存漏洞 |
| CVE-2026-90379 | 8.8 HIGH | Linux 内核 mt76 驱动系统崩溃漏洞 |
| CVE-2026-90162 | 8.8 HIGH | Linux ksmbd 锁授予UAF/双重释放竞态漏洞 |
显示前 20 条，共 600 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90413
暂无评论