cbcvebase.
CVE-2025-38149
published 2025-07-03

CVE-2025-38149: In the Linux kernel, the following vulnerability has been resolved: net: phy: clear phydev->devlink when the link is deleted There is a potential crash issue…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.15%
4.5th percentile
In the Linux kernel, the following vulnerability has been resolved: net: phy: clear phydev->devlink when the link is deleted There is a potential crash issue when disabling and re-enabling the network port. When disabling the network port, phy_detach() calls device_link_del() to remove the device link, but it does not clear phydev->devlink, so phydev->devlink is not a NULL pointer. Then the network port is re-enabled, but if phy_attach_direct() fails before calling device_link_add(), the code jumps to the "error" label and calls phy_detach(). Since phydev->devlink retains the old value from the previous attach/detach cycle, device_link_del() uses the old value, which accesses a NULL pointer and causes a crash. The simplified crash log is as follows. [ 24.702421] Call trace: [ 24.704856] device_link_put_kref+0x20/0x120 [ 24.709124] device_link_del+0x30/0x48 [ 24.712864] phy_detach+0x24/0x168 [ 24.716261] phy_attach_direct+0x168/0x3a4 [ 24.720352] phylink_fwnode_phy_connect+0xc8/0x14c [ 24.725140] phylink_of_phy_connect+0x1c/0x34 Therefore, phydev->devlink needs to be cleared when the device link is deleted.

Affected

23 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.12.35-1 (forky)linux 6.12.35-1 (forky)
linuxlinux
linuxlinux>= bc66fa87d4fda9053a8145e5718fc278c2b88253 < 363fdf2777423ad346d781f09548cca14877f729363fdf2777423ad346d781f09548cca14877f729
linuxlinux>= bc66fa87d4fda9053a8145e5718fc278c2b88253 < ddc654e89ace723b78c34911c65243accbc9b75cddc654e89ace723b78c34911c65243accbc9b75c
linuxlinux>= bc66fa87d4fda9053a8145e5718fc278c2b88253 < 034bc4a2a72dea2cfcaf24c6bae03c38ad5a0b87034bc4a2a72dea2cfcaf24c6bae03c38ad5a0b87
linuxlinux>= bc66fa87d4fda9053a8145e5718fc278c2b88253 < 0795b05a59b1371b18ffbf09d385296b12e9f5d50795b05a59b1371b18ffbf09d385296b12e9f5d5
linuxlinux_kernel>= 0 < 6.12.35-16.12.35-1
linuxlinux_kernel>= 0 < 6.12.35-16.12.35-1
linuxlinux_kernel>= 0 < 6.8.0-100.1006.8.0-100.100
linuxlinux_kernel>= 6.13 < 6.15.36.15.3
linuxlinux_kernel>= 6.2 < 6.6.946.6.94
linuxlinux_kernel>= 6.7 < 6.12.346.12.34
msrcazl3_kernel_6.6.92.2-2_on_azure_linux_3.0
msrcazl3_kernel_6.6.96.1-1_on_azure_linux_3.0
ubuntulinux-aws
ubuntulinux-aws-6.8
ubuntulinux-gkeop
ubuntulinux-nvidia
ubuntulinux-nvidia-6.8
ubuntulinux-oracle
ubuntulinux-oracle-6.8
ubuntulinux-raspi-realtime
ubuntulinux-realtime

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu3.2LOW
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