7.8
High
CVE-2023-4623 A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be…
Description
A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation. If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free. We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| kernel 2.6 | 2.6.12 → < 6.6 | 6.6 |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.0 → < 3.1.5 | 3.1.5 |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 | 3.1.0 → < 3.1.5 | 3.1.5 |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1 | earliest → < 1.1 | 1.1 |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.0 → < 3.1.5 | 3.1.5 |
References
- git.kernel.org git.kernel.org
- kernel.dance kernel.dance
- lists.debian.org lists.debian.org
- packetstormsecurity.com packetstormsecurity.com
- lists.debian.org lists.debian.org
Timeline
- Published
- Last modified
Other CVEs of kernel
The 97 CVEs of kernel →
CVE-2021-47482
In the Linux kernel, the following vulnerability has been resolved: net: batman-adv: fix error handling Syzbot…
5.3
Medium
CVE-2024-25743
In the Linux kernel through 6.9, an untrusted hypervisor can inject virtual interrupts 0 and 14 at any point in time and…
7.1
High
CVE-2021-34981
Linux Kernel Bluetooth CMTP Module Double Free Privilege Escalation Vulnerability
7.5
High
CVE-2023-52584
In the Linux kernel, the following vulnerability has been resolved: spmi: mediatek: Fix UAF on device remove The pmif…
3.8
Low