CVE-2026-23098
Double-Free Vulnerability in Linux Kernel netrom nr_route_frame
Publication date: 2026-02-04
Last updated on: 2026-04-03
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | From 5.11 (inc) to 5.15.199 (exc) |
| linux | linux_kernel | From 5.16 (inc) to 6.1.162 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.6.122 (exc) |
| linux | linux_kernel | From 6.7 (inc) to 6.12.68 (exc) |
| linux | linux_kernel | From 6.13 (inc) to 6.18.8 (exc) |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | From 2.6.12.1 (inc) to 5.10.249 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-415 | The product calls free() twice on the same memory address. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's netrom component, specifically in the function nr_route_frame(). The issue is a double-free bug where a memory buffer (old_skb) is freed twice. This happens because the code frees old_skb without first checking if the pointer nr_neigh->ax25 is NULL. If nr_neigh->ax25 is NULL, the caller function will attempt to free old_skb again, leading to a double-free condition.
The fix involves modifying the code to check whether nr_neigh->ax25 is NULL before freeing old_skb, preventing the double-free from occurring.
How can this vulnerability impact me? :
A double-free vulnerability can lead to undefined behavior such as memory corruption, crashes, or potentially allow an attacker to execute arbitrary code. In this case, exploiting the double-free bug in the Linux kernel's netrom component could compromise system stability or security.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know