{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68758", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:30:51.033Z", "datePublished": "2026-01-05T09:32:31.399Z", "dateUpdated": "2026-01-05T09:32:31.399Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-01-05T09:32:31.399Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbacklight: led-bl: Add devlink to supplier LEDs\n\nLED Backlight is a consumer of one or multiple LED class devices, but\ndevlink is currently unable to create correct supplier-producer links when\nthe supplier is a class device. It creates instead a link where the\nsupplier is the parent of the expected device.\n\nOne consequence is that removal order is not correctly enforced.\n\nIssues happen for example with the following sections in a device tree\noverlay:\n\n // An LED driver chip\n pca9632@62 {\n compatible = \"nxp,pca9632\";\n reg = <0x62>;\n\n\t// ...\n\n addon_led_pwm: led-pwm@3 {\n reg = <3>;\n label = \"addon:led:pwm\";\n };\n };\n\n backlight-addon {\n compatible = \"led-backlight\";\n leds = <&addon_led_pwm>;\n brightness-levels = <255>;\n default-brightness-level = <255>;\n };\n\nIn this example, the devlink should be created between the backlight-addon\n(consumer) and the pca9632@62 (supplier). Instead it is created between the\nbacklight-addon (consumer) and the parent of the pca9632@62, which is\ntypically the I2C bus adapter.\n\nOn removal of the above overlay, the LED driver can be removed before the\nbacklight device, resulting in:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n ...\n Call trace:\n led_put+0xe0/0x140\n devm_led_release+0x6c/0x98\n\nAnother way to reproduce the bug without any device tree overlays is\nunbinding the LED class device (pca9632@62) before unbinding the consumer\n(backlight-addon):\n\n echo 11-0062 >/sys/bus/i2c/drivers/leds-pca963x/unbind\n echo ...backlight-dock >/sys/bus/platform/drivers/led-backlight/unbind\n\nFix by adding a devlink between the consuming led-backlight device and the\nsupplying LED device, as other drivers and subsystems do as well."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/backlight/led_bl.c"], "versions": [{"version": "ae232e45acf9621f2c96b41ca3af006ac7552c33", "lessThan": "0e63ea4378489e09eb5e920c8a50c10caacf563a", "status": "affected", "versionType": "git"}, {"version": "ae232e45acf9621f2c96b41ca3af006ac7552c33", "lessThan": "60a24070392ec726ccfe6ad1ca7b0381c8d8f7c9", "status": "affected", "versionType": "git"}, {"version": "ae232e45acf9621f2c96b41ca3af006ac7552c33", "lessThan": "08c9dc6b0f2c68e5e7c374ac4499e321e435d46c", "status": "affected", "versionType": "git"}, {"version": "ae232e45acf9621f2c96b41ca3af006ac7552c33", "lessThan": "9341d6698f4cfdfc374fb6944158d111ebe16a9d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/backlight/led_bl.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.12.63"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.17.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.18.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.19-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0e63ea4378489e09eb5e920c8a50c10caacf563a"}, {"url": "https://git.kernel.org/stable/c/60a24070392ec726ccfe6ad1ca7b0381c8d8f7c9"}, {"url": "https://git.kernel.org/stable/c/08c9dc6b0f2c68e5e7c374ac4499e321e435d46c"}, {"url": "https://git.kernel.org/stable/c/9341d6698f4cfdfc374fb6944158d111ebe16a9d"}], "title": "backlight: led-bl: Add devlink to supplier LEDs", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbacklight: led-bl: Add devlink to supplier LEDs\n\nLED Backlight is a consumer of one or multiple LED class devices, but\ndevlink is currently unable to create correct supplier-producer links when\nthe supplier is a class device. It creates instead a link where the\nsupplier is the parent of the expected device.\n\nOne consequence is that removal order is not correctly enforced.\n\nIssues happen for example with the following sections in a device tree\noverlay:\n\n // An LED driver chip\n pca9632@62 {\n compatible = \"nxp,pca9632\";\n reg = <0x62>;\n\n\t// ...\n\n addon_led_pwm: led-pwm@3 {\n reg = <3>;\n label = \"addon:led:pwm\";\n };\n };\n\n backlight-addon {\n compatible = \"led-backlight\";\n leds = <&addon_led_pwm>;\n brightness-levels = <255>;\n default-brightness-level = <255>;\n };\n\nIn this example, the devlink should be created between the backlight-addon\n(consumer) and the pca9632@62 (supplier). Instead it is created between the\nbacklight-addon (consumer) and the parent of the pca9632@62, which is\ntypically the I2C bus adapter.\n\nOn removal of the above overlay, the LED driver can be removed before the\nbacklight device, resulting in:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n ...\n Call trace:\n led_put+0xe0/0x140\n devm_led_release+0x6c/0x98\n\nAnother way to reproduce the bug without any device tree overlays is\nunbinding the LED class device (pca9632@62) before unbinding the consumer\n(backlight-addon):\n\n echo 11-0062 >/sys/bus/i2c/drivers/leds-pca963x/unbind\n echo ...backlight-dock >/sys/bus/platform/drivers/led-backlight/unbind\n\nFix by adding a devlink between the consuming led-backlight device and the\nsupplying LED device, as other drivers and subsystems do as well."}], "id": "CVE-2025-68758", "lastModified": "2026-01-05T10:15:56.897", "metrics": {}, "published": "2026-01-05T10:15:56.897", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08c9dc6b0f2c68e5e7c374ac4499e321e435d46c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0e63ea4378489e09eb5e920c8a50c10caacf563a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/60a24070392ec726ccfe6ad1ca7b0381c8d8f7c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9341d6698f4cfdfc374fb6944158d111ebe16a9d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: backlight: led-bl: Add devlink to supplier LEDs", "id": "2427124", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427124"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-68758", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68758\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68758\nhttps://lore.kernel.org/linux-cve-announce/2026010550-CVE-2025-68758-a505@gregkh/T"], "threat_severity": "Low"}

{}