CVE-2026-31607— 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usbip驱动usbip_pack_ret_submit()未验证number_of_packets值，恶意服务器可设置过大值导致堆越界写入。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 30
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1325f85fa49f57df034869de430f7c302ae23109< 324262c38438255bf6bdbf6342ca47c0badaab76 |
affected |
1325f85fa49f57df034869de430f7c302ae23109< 973f2c250289f5bf6cc146b98aa6fdde11fe50d6 |
affected | ||
1325f85fa49f57df034869de430f7c302ae23109< ce744264b06b97069b3722511ab355738311fee0 |
affected | ||
1325f85fa49f57df034869de430f7c302ae23109< 885c8591784da6314f9aa82fa460ac69f9f79e5f |
affected | ||
1325f85fa49f57df034869de430f7c302ae23109< 8d155e2d1c4102f74f82a2bf9c016164bb0f7384 |
affected | ||
1325f85fa49f57df034869de430f7c302ae23109< 906f16a836de13fe61f49cdce2f66f2dbd14caf4 |
affected | ||
1325f85fa49f57df034869de430f7c302ae23109< ef8ebb1c637b4cfb61a9dd2e013376774ee2033b |
affected | ||
1325f85fa49f57df034869de430f7c302ae23109< 5e1c4ece08ccdc197177631f111845a2c68eede3 |
affected | ||
| … +22 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-31607 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
usbip: validate number_of_packets in usbip_pack_ret_submit()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
usbip: validate number_of_packets in usbip_pack_ret_submit()
When a USB/IP client receives a RET_SUBMIT response,
usbip_pack_ret_submit() unconditionally overwrites
urb->number_of_packets from the network PDU. This value is
subsequently used as the loop bound in usbip_recv_iso() and
usbip_pad_iso() to iterate over urb->iso_frame_desc[], a flexible
array whose size was fixed at URB allocation time based on the
*original* number_of_packets from the CMD_SUBMIT.
A malicious USB/IP server can set number_of_packets in the response
to a value larger than what was originally submitted, causing a heap
out-of-bounds write when usbip_recv_iso() writes to
urb->iso_frame_desc[i] beyond the allocated region.
KASAN confirmed this with kernel 7.0.0-rc5:
BUG: KASAN: slab-out-of-bounds in usbip_recv_iso+0x46a/0x640
Write of size 4 at addr ffff888106351d40 by task vhci_rx/69
The buggy address is located 0 bytes to the right of
allocated 320-byte region [ffff888106351c00, ffff888106351d40)
The server side (stub_rx.c) and gadget side (vudc_rx.c) already
validate number_of_packets in the CMD_SUBMIT path since commits
c6688ef9f297 ("usbip: fix stub_rx: harden CMD_SUBMIT path to handle
malicious input") and b78d830f0049 ("usbip: fix vudc_rx: harden
CMD_SUBMIT path to handle malicious input"). The server side validates
against USBIP_MAX_ISO_PACKETS because no URB exists yet at that point.
On the client side we have the original URB, so we can use the tighter
bound: the response must not exceed the original number_of_packets.
This mirrors the existing validation of actual_length against
transfer_buffer_length in usbip_recv_xbuff(), which checks the
response value against the original allocation size.
Kelvin Mbogo's series ("usb: usbip: fix integer overflow in
usbip_recv_iso()", v2) hardens the receive-side functions themselves;
this patch complements that work by catching the bad value at its
source -- in usbip_pack_ret_submit() before the overwrite -- and
using the tighter per-URB allocation bound rather than the global
USBIP_MAX_ISO_PACKETS limit.
Fix this by checking rpdu->number_of_packets against
urb->number_of_packets in usbip_pack_ret_submit() before the
overwrite. On violation, clamp to zero so that usbip_recv_iso() and
usbip_pad_iso() safely return early.
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:H/A:H
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usbip驱动usbip_pack_ret_submit()未验证number_of_packets值，恶意服务器可设置过大值导致堆越界写入。
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-2026-31607 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-2026-31607 的情报信息
请登录查看更多情报信息。
CVE-2026-31607 补丁与修复 (5)
同批安全公告 · Linux · 2026-04-24 · 共 138 条
| CVE-2026-31637 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31589 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31536 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31649 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31669 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31668 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31608 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31633 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31609 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31657 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31659 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31636 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-31588 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31570 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31558 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31553 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31622 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31629 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31611 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31631 | 8.2 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 138 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-31607
暂无评论