CVE-2023-53566
BaseFortify
Publication date: 2025-10-04
Last updated on: 2026-03-21
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 | 6.2 |
| linux | linux_kernel | 6.4 |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a flaw in the Linux kernel's netfilter component, specifically in the nft_set_rbtree function. It involves a null pointer dereference during element insertion because there is no guarantee that the rb_prev() function will not return NULL in nft_rbtree_gc_elem(). This can lead to a general protection fault. Additionally, there is a possible use-after-free issue during iteration where a 'node' can be freed unexpectedly, requiring caching of the next value to avoid errors.
How can this vulnerability impact me? :
This vulnerability can cause the Linux kernel to crash or behave unpredictably due to null pointer dereference and use-after-free errors. This may lead to denial of service or system instability, potentially affecting the availability and reliability of systems running vulnerable versions of the Linux kernel.