- Description
- 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.
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- NVD status
- Awaiting Analysis
CVSS 3.1
- Type
- Secondary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
- 134c704f-9b21-4f2e-91b3-4a467353bcc0
- CWE-416
- Hype score
- Not currently trending
We have just added an important vulnerability affecting Linux Kernel (CVE-2025-21703) https://t.co/Qhx5M2TyT5
@vuldb
18 Feb 2025
57 Impressions
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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() notifie… https://t.co/8W8L5SKJEH
@CVEnew
18 Feb 2025
260 Impressions
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