CVE-2025-40239

In the Linux kernel, the following vulnerability has been resolved: net: phy: micrel: always set shared->phydev for LAN8814 Currently, during the LAN8814 PTP probe shared->phydev is only set if PTP clock gets actually set, otherwise the function will return before setting it. This is an issue as shared->phydev is unconditionally being used when IRQ is being handled, especially in lan8814_gpio_process_cap and since it was not set it will cause a NULL pointer exception and crash the kernel. So, simply always set shared->phydev to avoid the NULL pointer exception.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/399d10934740ae8cdaa4e3245f7c5f6c332da844
https://git.kernel.org/stable/c/b093b06826b836c2824858669db080c190c04715
https://git.kernel.org/stable/c/da1ef8e9eb5d4a12bec32d11636e521e7d529b9e

Configurations

No configuration.

History

No history.

Information

Published : 2025-12-04 16:16

Updated : 2026-06-17 09:21

NVD link : CVE-2025-40239

Mitre link : CVE-2025-40239

CVE.ORG link : CVE-2025-40239

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2025-40239", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746", "lessThan": "da1ef8e9eb5d4a12bec32d11636e521e7d529b9e", "versionType": "git"}, {"status": "affected", "version": "b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746", "lessThan": "b093b06826b836c2824858669db080c190c04715", "versionType": "git"}, {"status": "affected", "version": "b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746", "lessThan": "399d10934740ae8cdaa4e3245f7c5f6c332da844", "versionType": "git"}], "programFiles": ["drivers/net/phy/micrel.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"status": "unaffected", "version": "0", "lessThan": "6.10", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.56", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.17.6", "versionType": "semver", "lessThanOrEqual": "6.17.*"}, {"status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/phy/micrel.c"], "defaultStatus": "affected"}]}], "published": "2025-12-04T16:16:16.963", "references": [{"url": "https://git.kernel.org/stable/c/399d10934740ae8cdaa4e3245f7c5f6c332da844", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b093b06826b836c2824858669db080c190c04715", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/da1ef8e9eb5d4a12bec32d11636e521e7d529b9e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Deferred", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phy: micrel: always set shared->phydev for LAN8814\n\nCurrently, during the LAN8814 PTP probe shared->phydev is only set if PTP\nclock gets actually set, otherwise the function will return before setting\nit.\n\nThis is an issue as shared->phydev is unconditionally being used when IRQ\nis being handled, especially in lan8814_gpio_process_cap and since it was\nnot set it will cause a NULL pointer exception and crash the kernel.\n\nSo, simply always set shared->phydev to avoid the NULL pointer exception."}], "lastModified": "2026-06-17T09:21:30.623", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}