CVE-2024-42108

In the Linux kernel, the following vulnerability has been resolved: net: rswitch: Avoid use-after-free in rswitch_poll() The use-after-free is actually in rswitch_tx_free(), which is inlined in rswitch_poll(). Since `skb` and `gq->skbs[gq->dirty]` are in fact the same pointer, the skb is first freed using dev_kfree_skb_any(), then the value in skb->len is used to update the interface statistics. Let's move around the instructions to use skb->len before the skb is freed. This bug is trivial to reproduce using KFENCE. It will trigger a splat every few packets. A simple ARP request or ICMP echo request is enough.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/4a41bb9f2b402469d425a1c13359d3b3ea4e6403	Patch
https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58b	Patch
https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67	Patch
https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58b	Patch
https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2024-07-30 08:15

Updated : 2025-04-17 16:56

NVD link : CVE-2024-42108

Mitre link : CVE-2024-42108

CVE.ORG link : CVE-2024-42108

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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