CVE-2026-97563— SMB客户端CIFSSMBRead数据偏移越界漏洞
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： smb: 客户端：拒绝 CIFSSMBRead() 中越界的 DataOffset SMB1 同步读取辅助函数 会验证服务器返回的 （数据长度）是否不超过 以及调用方提供的 ，但从未对 （数据偏移量）进行有效性检查。其拷贝源地址构建为： &pSMBr->hdr.Protocol + le16_to_cpu(pSMBr->DataOffset) 随后通过 复制 字节的数据，但并未检查 这一范围是否完全落在从服务器实际收到的响应缓冲区之内。 恶意或已被攻陷的 SMB1 服务器可
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-97563 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
smb: client: reject out-of-bounds DataOffset in CIFSSMBRead()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: reject out-of-bounds DataOffset in CIFSSMBRead()
The SMB1 synchronous read helper CIFSSMBRead() validates the server's
DataLength against CIFSMaxBufSize and the caller's count, but never
validates DataOffset. The copy source is formed as
&pSMBr->hdr.Protocol + le16_to_cpu(pSMBr->DataOffset)
and memcpy()'d for DataLength bytes with no check that the
[DataOffset, DataOffset + DataLength) range lies within the response
actually received from the server.
A malicious or compromised SMB1 server can return a response carrying
an in-range DataLength and a large DataOffset, driving the source
pointer past the end of the response buffer. The memcpy() then copies
adjacent kernel heap into the caller's read buffer (information
disclosure), or reads unmapped memory and oopses (denial of service).
SMB1 is not negotiated by default; reaching this code requires an
explicit vers=1.0 mount.
Both DataOffset and the received response length recorded in
rsp_iov.iov_len are relative to the start of the SMB header, so reject
the response unless DataOffset + DataLength fits within that length,
using overflow-safe arithmetic, before forming the source pointer.
The response length has been validated by the previous patch, so the
DataOffset and DataLength fields can be read safely here.
While here, make data_length unsigned. It holds a length derived from
unsigned on-the-wire fields and is only ever compared against unsigned
quantities; print it with %u accordingly, and add __func__ to the
cifs_dbg() calls in this function.
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-2026-97563 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-2026-97563 的情报信息
请登录查看更多情报信息。
CVE-2026-97563 补丁与修复 (2)
同批安全公告 · Linux · 2026-09-25 · 共 372 条
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt：srpt_alloc_rw_ctxs() 未释放计数器修复 |
| CVE-2026-97957 | 8.8 HIGH | hinic 邮箱段缓冲区溢出漏洞 |
| CVE-2026-97527 | 8.8 HIGH | qla2xxx SCSI驱动程序 NVMe未解决上下文列表竞争条件漏洞 |
| CVE-2026-97528 | 8.8 HIGH | QLogic qla2xxx驱动LS拒绝错误NVMe内存泄漏漏洞 |
| CVE-2026-97555 | 8.8 HIGH | smb客户端：修复DACL所有者/组重写中的堆溢出漏洞 |
| CVE-2026-98115 | 8.8 HIGH | ksmbd 注销期间会话安全排空漏洞 |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat：内核页表分裂页表分配漏洞 |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en 驱动 bnxt_rx_ring_reset 缓冲区分配失败漏洞 |
| CVE-2026-98070 | 8.1 HIGH | Linux RDS 模块远程代码执行漏洞 |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: 修复因SW TPA ID绑定问题导致的崩溃漏洞 |
| CVE-2026-98069 | 8.1 HIGH | Net/RDS rds_conn_shutdown() 快速路径锁获取漏洞 |
| CVE-2026-98130 | 8.1 HIGH | SCTP定时器启动竞争条件漏洞 |
| CVE-2026-98116 | 7.8 HIGH | ALSA: PCM内存映射与缓冲区重新分配序列化以修复页面UAF漏洞 |
| CVE-2026-97903 | 7.8 HIGH | exit: proc_flush_pid 线程 PID 持引越界漏洞 |
| CVE-2026-97548 | 7.8 HIGH | XFS rtrmap和rtrefcount _maxlevels_ondisk函数漏洞 |
| CVE-2026-97611 | 7.8 HIGH | Open vSwitch 使用后释放漏洞 |
| CVE-2026-97612 | 7.8 HIGH | MPLS 协议栈在弹出标签时未清除 inner_protocol |
| CVE-2026-98073 | 7.8 HIGH | Linux 内核网络命名空间更改竞态条件漏洞 |
| CVE-2026-97602 | 7.8 HIGH | Linux内核inet模块队列失效前刷新漏洞 |
| CVE-2026-97577 | 7.8 HIGH | Rockchip RK3588 媒体引擎 AV1 帧容量超限漏洞 |
显示前 20 条，共 372 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-97563
暂无评论