{
  "cveId": "CVE-2025-68758",
  "url": "https://patchblox.com/security/cve/CVE-2025-68758",
  "summary": "CVE-2025-68758 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2025-68758, released January 5, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "backlight: led-bl: Add devlink to supplier LEDs",
  "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 = \u0022nxp,pca9632\u0022;         reg = \u003C0x62\u003E;  \t// ...          addon_led_pwm: led-pwm@3 {             reg = \u003C3\u003E;             label = \u0022addon:led:pwm\u0022;         };     };      backlight-addon {         compatible = \u0022led-backlight\u0022;         leds = \u003C\u0026addon_led_pwm\u003E;         brightness-levels = \u003C255\u003E;         default-brightness-level = \u003C255\u003E;     };  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\u002B0xe0/0x140      devm_led_release\u002B0x6c/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 \u003E/sys/bus/i2c/drivers/leds-pca963x/unbind   echo ...backlight-dock \u003E/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.",
  "published": "2026-01-05T10:15:56Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00198,
  "epssPercentile": 0.0961,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68758",
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}