CVE-2021-47125
CVSS 3.1 Score 5.5 of 10 (medium)
Details
Published Mar 15, 2024
Updated: Jan 7, 2025
Summary
CVE-2021-47125 is a vulnerability in the Linux kernel's sch_htb component. A NULL pointer dereference bug was identified and fixed in commit ae81feb7338c. However, the fix introduced an inconsistency between dev_queue->qdisc and cl->parent->leaf.q pointers, which can lead to refcount leaks. The correct fix involves adding a NULL pointer check to protect qdisc_refcount_inc inside htb_parent_to_leaf_offload.
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Affected Products
- Linux Kernel
Affected Vendors
- LINUX