CVE-2025-68758— 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led-bl背光驱动中devlink未正确链接到供应商LED，可能导致移除顺序错误。
影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | ae232e45acf9621f2c96b41ca3af006ac7552c33< 64739adf3eef063b8e2c72b7e919eac8c6480bf0 |
affected |
ae232e45acf9621f2c96b41ca3af006ac7552c33< cd01a24b3e52d6777b49c917d841f125fe9eebd0 |
affected | ||
ae232e45acf9621f2c96b41ca3af006ac7552c33< e06df738a9ad8417f1c4c7cd6992cda320e9e7ca |
affected | ||
ae232e45acf9621f2c96b41ca3af006ac7552c33< 30cbe4b642745a9488a0f0d78be43afe69d7555c |
affected | ||
ae232e45acf9621f2c96b41ca3af006ac7552c33< 0e63ea4378489e09eb5e920c8a50c10caacf563a |
affected | ||
ae232e45acf9621f2c96b41ca3af006ac7552c33< 60a24070392ec726ccfe6ad1ca7b0381c8d8f7c9 |
affected | ||
ae232e45acf9621f2c96b41ca3af006ac7552c33< 08c9dc6b0f2c68e5e7c374ac4499e321e435d46c |
affected | ||
ae232e45acf9621f2c96b41ca3af006ac7552c33< 9341d6698f4cfdfc374fb6944158d111ebe16a9d |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-68758 基础信息
漏洞信息
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Vulnerability Title
backlight: led-bl: Add devlink to supplier LEDs
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
backlight: led-bl: Add devlink to supplier LEDs
LED Backlight is a consumer of one or multiple LED class devices, but
devlink is currently unable to create correct supplier-producer links when
the supplier is a class device. It creates instead a link where the
supplier is the parent of the expected device.
One consequence is that removal order is not correctly enforced.
Issues happen for example with the following sections in a device tree
overlay:
// An LED driver chip
pca9632@62 {
compatible = "nxp,pca9632";
reg = <0x62>;
// ...
addon_led_pwm: led-pwm@3 {
reg = <3>;
label = "addon:led:pwm";
};
};
backlight-addon {
compatible = "led-backlight";
leds = <&addon_led_pwm>;
brightness-levels = <255>;
default-brightness-level = <255>;
};
In this example, the devlink should be created between the backlight-addon
(consumer) and the pca9632@62 (supplier). Instead it is created between the
backlight-addon (consumer) and the parent of the pca9632@62, which is
typically the I2C bus adapter.
On removal of the above overlay, the LED driver can be removed before the
backlight device, resulting in:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010
...
Call trace:
led_put+0xe0/0x140
devm_led_release+0x6c/0x98
Another way to reproduce the bug without any device tree overlays is
unbinding the LED class device (pca9632@62) before unbinding the consumer
(backlight-addon):
echo 11-0062 >/sys/bus/i2c/drivers/leds-pca963x/unbind
echo ...backlight-dock >/sys/bus/platform/drivers/led-backlight/unbind
Fix by adding a devlink between the consuming led-backlight device and the
supplying LED device, as other drivers and subsystems do as well.
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led-bl背光驱动中devlink未正确链接到供应商LED，可能导致移除顺序错误。
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-2025-68758 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-68758 其他参考 (4)
同批安全公告 · Linux · 2026-01-05 · 共 16 条
| CVE-2025-68761 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68764 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68753 | 7.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-68752 | Linux kernel 安全漏洞 | |
| CVE-2025-68751 | Linux kernel 安全漏洞 | |
| CVE-2025-68754 | Linux kernel 安全漏洞 | |
| CVE-2025-68755 | Linux kernel 安全漏洞 | |
| CVE-2025-68756 | Linux kernel 安全漏洞 | |
| CVE-2025-68757 | Linux kernel 安全漏洞 | |
| CVE-2025-68759 | Linux kernel 安全漏洞 | |
| CVE-2025-68760 | Linux kernel 安全漏洞 | |
| CVE-2025-68762 | Linux kernel 安全漏洞 | |
| CVE-2025-68763 | Linux kernel 安全漏洞 | |
| CVE-2025-68765 | Linux kernel 安全漏洞 | |
| CVE-2025-68766 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2025-68758
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