Vulnerability Database
296,747
Total vulnerabilities in the database
CVE-2023-4921
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.
| Software | From | Fixed in |
|---|---|---|
| debian / debian_linux | 10.0 | 10.0.x |
| linux / linux_kernel | 4.15 | 4.19.295 |
| linux / linux_kernel | 5.11 | 5.15.132 |
| linux / linux_kernel | 5.5 | 5.10.195 |
| linux / linux_kernel | 4.20 | 5.4.257 |
| linux / linux_kernel | 6.2 | 6.5.4 |
| linux / linux_kernel | 5.16 | 6.1.54 |
| linux / linux_kernel | 3.8 | 4.14.326 |
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8fc134fee27f2263988ae38920bc03da416b03d8
- https://kernel.dance/8fc134fee27f2263988ae38920bc03da416b03d8
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
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