VDB
DEBIAN-CVE-2023-4921
DEBIAN-CVE-2023-4921
PUBLISHED
CVSS 7.800000190734863 HIGH
A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue(). We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | linux | 6.1.38-2~bpo11+1, 6.1.38-3, 6.1.38-4 |
| Debian:14 | linux | 0, 0, 0 |
| Debian:13 | linux | 0, 0, 0 |
| Debian:11 | linux | 5.10.120-1, 5.10.120-1, 5.10.127-1 |
Timeline
- Sep 12, 2023 CVE Published
- Apr 28, 2026 CVE Updated