CVE-2025-68194— 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，该漏洞源于错误处理不当，可能导致RCU停滞。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 21677cfc562a27e099719d413287bc8d1d24deb7< 519737af11c03590819a6eec2ad532cfdb87ea63 |
affected |
21677cfc562a27e099719d413287bc8d1d24deb7< f58ab83b7b7133e6baefe03a46846c4f6ce45e2f |
affected | ||
21677cfc562a27e099719d413287bc8d1d24deb7< 26f6a1dd5d81ad61a875a747698da6f27abf389b |
affected | ||
21677cfc562a27e099719d413287bc8d1d24deb7< 667afd4681781f60a644cd0d2ee6c59cb1c36208 |
affected | ||
21677cfc562a27e099719d413287bc8d1d24deb7< 8231e80118463be5598daaf266c1c83650f1948b |
affected | ||
21677cfc562a27e099719d413287bc8d1d24deb7< 0213e4175abbb9dfcbf7c197e3817d527f459ad5 |
affected | ||
21677cfc562a27e099719d413287bc8d1d24deb7< f7f3ecb4934fff782fa9bb1cd16e2290c041b22d |
affected | ||
21677cfc562a27e099719d413287bc8d1d24deb7< eecd203ada43a4693ce6fdd3a58ae10c7819252c |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-68194 基础信息
漏洞信息
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Vulnerability Title
media: imon: make send_packet() more robust
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
media: imon: make send_packet() more robust
syzbot is reporting that imon has three problems which result in
hung tasks due to forever holding device lock [1].
First problem is that when usb_rx_callback_intf0() once got -EPROTO error
after ictx->dev_present_intf0 became true, usb_rx_callback_intf0()
resubmits urb after printk(), and resubmitted urb causes
usb_rx_callback_intf0() to again get -EPROTO error. This results in
printk() flooding (RCU stalls).
Alan Stern commented [2] that
In theory it's okay to resubmit _if_ the driver has a robust
error-recovery scheme (such as giving up after some fixed limit on the
number of errors or after some fixed time has elapsed, perhaps with a
time delay to prevent a flood of errors). Most drivers don't bother to
do this; they simply give up right away. This makes them more
vulnerable to short-term noise interference during USB transfers, but in
reality such interference is quite rare. There's nothing really wrong
with giving up right away.
but imon has a poor error-recovery scheme which just retries forever;
this behavior should be fixed.
Since I'm not sure whether it is safe for imon users to give up upon any
error code, this patch takes care of only union of error codes chosen from
modules in drivers/media/rc/ directory which handle -EPROTO error (i.e.
ir_toy, mceusb and igorplugusb).
Second problem is that when usb_rx_callback_intf0() once got -EPROTO error
before ictx->dev_present_intf0 becomes true, usb_rx_callback_intf0() always
resubmits urb due to commit 8791d63af0cf ("[media] imon: don't wedge
hardware after early callbacks"). Move the ictx->dev_present_intf0 test
introduced by commit 6f6b90c9231a ("[media] imon: don't parse scancodes
until intf configured") to immediately before imon_incoming_packet(), or
the first problem explained above happens without printk() flooding (i.e.
hung task).
Third problem is that when usb_rx_callback_intf0() is not called for some
reason (e.g. flaky hardware; the reproducer for this problem sometimes
prevents usb_rx_callback_intf0() from being called),
wait_for_completion_interruptible() in send_packet() never returns (i.e.
hung task). As a workaround for such situation, change send_packet() to
wait for completion with timeout of 10 seconds.
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，该漏洞源于错误处理不当，可能导致RCU停滞。
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-2025-68194 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-68194 其他参考 (8)
同批安全公告 · Linux · 2025-12-16 · 共 156 条
| CVE-2025-68284 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-40350 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68263 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68301 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68192 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68285 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68315 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-68226 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68255 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68256 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68304 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68314 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-40362 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68250 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68183 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68212 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68208 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68207 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68303 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68181 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 156 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-68194
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