Bugzilla – Bug 1223835
VUL-0: CVE-2024-27063: kernel: leds: trigger: netdev: Fix kernel panic on interface rename trig notify
Last modified: 2024-05-06 07:48:02 UTC
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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-27063 https://www.cve.org/CVERecord?id=CVE-2024-27063 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/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-27063.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2278385
All done, closing.