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CVE-2025-68758— backlight: led-bl: Add devlink to supplier LEDs

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.20% · P9

Affected Version Matrix 18

VendorProduct Version RangeStatus
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 more rows
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I. Basic Information for CVE-2025-68758

Vulnerability Information
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Vulnerability Title
backlight: led-bl: Add devlink to supplier LEDs
Source: 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux ae232e45acf9621f2c96b41ca3af006ac7552c33 ~ 64739adf3eef063b8e2c72b7e919eac8c6480bf0 -
Linux Linux 5.6 -

II. Public POCs for CVE-2025-68758

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III. Intelligence Information for CVE-2025-68758

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Other References for CVE-2025-68758 (4)

Same Patch Batch · Linux · 2026-01-05 · 16 CVEs total

CVE-2025-68761 7.8 HIGH hfs: fix potential use after free in hfs_correct_next_unused_CNID()
CVE-2025-68764 7.8 HIGH NFS: Automounted filesystems should inherit ro,noexec,nodev,sync flags
CVE-2025-68753 7.1 HIGH ALSA: firewire-motu: add bounds check in put_user loop for DSP events
CVE-2025-68752 iavf: Implement settime64 with -EOPNOTSUPP
CVE-2025-68751 s390/fpu: Fix false-positive kmsan report in fpu_vstl()
CVE-2025-68754 rtc: amlogic-a4: fix double free caused by devm
CVE-2025-68755 staging: most: remove broken i2c driver
CVE-2025-68756 block: Use RCU in blk_mq_[un]quiesce_tagset() instead of set->tag_list_lock
CVE-2025-68757 drm/vgem-fence: Fix potential deadlock on release
CVE-2025-68759 wifi: rtl818x: Fix potential memory leaks in rtl8180_init_rx_ring()
CVE-2025-68760 iommu/amd: Fix potential out-of-bounds read in iommu_mmio_show
CVE-2025-68762 net: netpoll: initialize work queue before error checks
CVE-2025-68763 crypto: starfive - Correctly handle return of sg_nents_for_len
CVE-2025-68765 mt76: mt7615: Fix memory leak in mt7615_mcu_wtbl_sta_add()
CVE-2025-68766 irqchip/mchp-eic: Fix error code in mchp_eic_domain_alloc()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68758

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