CVE-2023-53398
BaseFortify
Publication date: 2025-09-18
Last updated on: 2025-12-12
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 | From 6.0 (inc) to 6.1.18 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.2.5 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
This vulnerability can lead to use-after-free errors in the kernel, which may cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or cause denial of service by exploiting the improper handling of the FIFO queue in the mlx5 driver.
Can you explain this vulnerability to me?
This vulnerability in the Linux kernel's mlx5 driver involves a use-after-free issue in the PTP queue FIFO. The FIFO indexes are not properly checked during pop operations, which can lead to popping from an empty queue and cause use-after-free errors. This situation can occur during a re-sync action when out-of-order completion queue entries (CQE) cause the queue to drain improperly. The fix adds checks and counters to prevent resync operations if the socket buffer (SKB) cannot exist in the FIFO due to these out-of-order CQEs.