CVE-2021-47671: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path
First published: Thu Apr 17 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path In es58x_rx_err_msg(), if can->do_set_mode() fails, the function directly returns without calling netif_rx(skb). This means that the skb previously allocated by alloc_can_err_skb() is not freed. In other terms, this is a memory leak. This patch simply removes the return statement in the error branch and let the function continue. Issue was found with GCC -fanalyzer, please follow the link below for details.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=5.13<5.14.19 | |
| Linux Kernel | >=5.15<5.15.3 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-47671?
CVE-2021-47671 is categorized as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2021-47671?
To fix CVE-2021-47671, upgrade to the latest patched version of the Linux kernel provided by your distribution.
What systems are affected by CVE-2021-47671?
CVE-2021-47671 affects various versions of the Linux kernel that implement the ES58x CAN driver.
What type of vulnerability is CVE-2021-47671?
CVE-2021-47671 is a memory leak vulnerability in the Linux kernel's can subsystem.
Is there any threat to data integrity from CVE-2021-47671?
While CVE-2021-47671 primarily causes resource leaks, it could lead to denial of service under specific conditions.
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