CVE-2025-22003— 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strscpy函数存在越界读取问题。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7fdaf8966aae476deafe11f9a0067ff588615444< cc29775a8a72d7f3b56cc026796ad99bd65804a7 |
affected |
7fdaf8966aae476deafe11f9a0067ff588615444< 8cec9e314d3360fc1d8346297c41a6ee45cb45a9 |
affected | ||
7fdaf8966aae476deafe11f9a0067ff588615444< a4994161a61bc8fd71d105c579d847cefee99262 |
affected | ||
7fdaf8966aae476deafe11f9a0067ff588615444< 1d22a122ffb116c3cf78053e812b8b21f8852ee9 |
affected | ||
6.2 |
affected | ||
< 6.2 |
unaffected | ||
6.6.85≤ 6.6.* |
unaffected | ||
6.12.21≤ 6.12.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2025-22003 基础信息
漏洞信息
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Vulnerability Title
can: ucan: fix out of bound read in strscpy() source
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
can: ucan: fix out of bound read in strscpy() source
Commit 7fdaf8966aae ("can: ucan: use strscpy() to instead of strncpy()")
unintentionally introduced a one byte out of bound read on strscpy()'s
source argument (which is kind of ironic knowing that strscpy() is meant
to be a more secure alternative :)).
Let's consider below buffers:
dest[len + 1]; /* will be NUL terminated */
src[len]; /* may not be NUL terminated */
When doing:
strncpy(dest, src, len);
dest[len] = '\0';
strncpy() will read up to len bytes from src.
On the other hand:
strscpy(dest, src, len + 1);
will read up to len + 1 bytes from src, that is to say, an out of bound
read of one byte will occur on src if it is not NUL terminated. Note
that the src[len] byte is never copied, but strscpy() still needs to
read it to check whether a truncation occurred or not.
This exact pattern happened in ucan.
The root cause is that the source is not NUL terminated. Instead of
doing a copy in a local buffer, directly NUL terminate it as soon as
usb_control_msg() returns. With this, the local firmware_str[] variable
can be removed.
On top of this do a couple refactors:
- ucan_ctl_payload->raw is only used for the firmware string, so
rename it to ucan_ctl_payload->fw_str and change its type from u8 to
char.
- ucan_device_request_in() is only used to retrieve the firmware
string, so rename it to ucan_get_fw_str() and refactor it to make it
directly handle all the string termination logic.
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
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strscpy函数存在越界读取问题。
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-2025-22003 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2025-04-03 · 共 13 条
| CVE-2025-22004 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22001 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21999 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-22007 | Linux kernel 安全漏洞 | |
| CVE-2025-22006 | Linux kernel 安全漏洞 | |
| CVE-2025-22005 | Linux kernel 安全漏洞 | |
| CVE-2025-22002 | Linux kernel 安全漏洞 | |
| CVE-2025-22000 | Linux kernel 安全漏洞 | |
| CVE-2025-21998 | Linux kernel 安全漏洞 | |
| CVE-2025-21997 | Linux kernel 安全漏洞 | |
| CVE-2025-21996 | Linux kernel 安全漏洞 | |
| CVE-2025-21995 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2025-22003
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