CVE Alert: CVE-2025-21703
Vulnerability Summary: CVE-2025-21703
In the Linux kernel, the following vulnerability has been resolved: netem: Update sch->q.qlen before qdisc_tree_reduce_backlog() qdisc_tree_reduce_backlog() notifies parent qdisc only if child qdisc becomes empty, therefore we need to reduce the backlog of the child qdisc before calling it. Otherwise it would miss the opportunity to call cops->qlen_notify(), in the case of DRR, it resulted in UAF since DRR uses ->qlen_notify() to maintain its active list.
Affected Endpoints:
No affected endpoints listed.
Published Date:
2/18/2025, 3:15:18 PM
🔥 CVSS Score:
Exploit Status:
Not ExploitedReferences:
- https://git.kernel.org/stable/c/1f8e3f4a4b8b90ad274dfbc66fc7d55cb582f4d5
- https://git.kernel.org/stable/c/6312555249082d6d8cc5321ff725df05482d8b83
- https://git.kernel.org/stable/c/638ba5089324796c2ee49af10427459c2de35f71
- https://git.kernel.org/stable/c/839ecc583fa00fab785fde1c85a326743657fd32
Recommended Action:
No proposed action available. Please refer to vendor documentation for updates.
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