CVE-2025-21700: Use After Free

In the Linux kernel, the following vulnerability has been resolved: net: sched: Disallow replacing of child qdisc from one parent to another Lion Ackermann was able to create a UAF which can be abused for privilege escalation with the following script Step 1. create root qdisc tc qdisc add dev lo...

PT-2025-6936

Name of the Vulnerable Software and Affected Versions: Linux Kernel affected versions not specified Description: A vulnerability in the Linux kernel has been resolved, which allowed for the replacement of a child qdisc from one parent to another. This issue was discovered by Lion Ackermann, who w...

CVE-2024-53044

In the Linux kernel, the following vulnerability has been resolved: net/sched: schapi: fix xainsert error path in tcfblockgetext This command: $ tc qdisc replace dev eth0 ingressblock 1 egressblock 1 clsact Error: block dev insert failed: -EBUSY. fails because user space requests the same block...

CVE-2024-53044

CVE-2024-53044 affects the Linux kernel net/sched component (sch_api) and is tied to the tcf_block_get_ext() path. The root cause is an xa_insert() error handling route, which can mis-handle a failure when the same block index is requested for ingress and egress, leading to a busy block condition...