CVE-2024-27063: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: leds: trigger: netdev: Fix kernel panic on interface rename trig notify Commit d5e01266e7f5 ("leds: trigger: netdev: add additional specific link speed mode") in the various changes, reworked the way to set the LINKUP mode in commit cee4bd16c319 ("leds: trigger: netdev: Recheck NETDEV_LED_MODE_LINKUP on dev rename") and moved it to a generic function. This changed the logic where, in the previous implementation the dev from the trigger event was used to check if the carrier was ok, but in the new implementation with the generic function, the dev in trigger_data is used instead. This is problematic and cause a possible kernel panic due to the fact that the dev in the trigger_data still reference the old one as the new one (passed from the trigger event) still has to be hold and saved in the trigger_data struct (done in the NETDEV_REGISTER case). On calling of get_device_state(), an invalid net_dev is used and this cause a kernel panic. To handle this correctly, move the call to get_device_state() after the new net_dev is correctly set in trigger_data (in the NETDEV_REGISTER case) and correctly parse the new dev.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.5 — 6.6.24
linux	linux_kernel	6.7 — 6.7.12
linux	linux_kernel	6.8 — 6.8.3

References

Advisories & Patches

https://git.kernel.org/stable/c/10f2af1af8ab8a7064f193446abd5579d3def7e3 https://git.kernel.org/stable/c/3f360227cb46edb2cd2494128e1e06ed5768a62e https://git.kernel.org/stable/c/415798bc07dd1c1ae3a656aa026580816e0b9fe8 https://git.kernel.org/stable/c/acd025c7a7d151261533016a6ca2d38f2de04e87 https://git.kernel.org/stable/c/10f2af1af8ab8a7064f193446abd5579d3def7e3 https://git.kernel.org/stable/c/3f360227cb46edb2cd2494128e1e06ed5768a62e https://git.kernel.org/stable/c/415798bc07dd1c1ae3a656aa026580816e0b9fe8 https://git.kernel.org/stable/c/acd025c7a7d151261533016a6ca2d38f2de04e87

Frequently Asked Questions

What is CVE-2024-27063? +

In the Linux kernel, the following vulnerability has been resolved: leds: trigger: netdev: Fix kernel panic on interface rename trig notify Commit d5e01266e7f5 ("leds: trigger: netdev: add additional specific link speed mode") in the various changes, reworked the way to set the LINKUP mode in commit cee4bd16c319 ("leds: trigger: netdev: Recheck NETDEV_LED_MODE_LINKUP on dev rename") and moved it to a generic function. This changed the logic where, in the previous implementation the dev from the trigger event was used to check if the carrier was ok, but in the new implementation with the generic function, the dev in trigger_data is used instead. This is problematic and cause a possible kernel panic due to the fact that the dev in the trigger_data still reference the old one as the new one (passed from the trigger event) still has to be hold and saved in the trigger_data struct (done in the NETDEV_REGISTER case). On calling of get_device_state(), an invalid net_dev is used and this cause a kernel panic. To handle this correctly, move the call to get_device_state() after the new net_dev is correctly set in trigger_data (in the NETDEV_REGISTER case) and correctly parse the new dev. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-27063? +

CVE-2024-27063 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-27063? +

CVE-2024-27063 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-27063? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-27063