CVE-2025-38190

atm: Revert atm_account_tx() if copy_from_iter_full() fails.

Description

In the Linux kernel, the following vulnerability has been resolved: atm: Revert atm_account_tx() if copy_from_iter_full() fails. In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by atm_account_tx(). It is expected to be reverted by atm_pop_raw() later called by vcc->dev->ops->send(vcc, skb). However, vcc_sendmsg() misses the same revert when copy_from_iter_full() fails, and then we will leak a socket. Let's factorise the revert part as atm_return_tx() and call it in the failure path. Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit. $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/5e0d00992118e234ebf29d5145c1cc920342777e
https://git.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1
https://git.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8
https://git.kernel.org/stable/c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96d
https://git.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5
https://git.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739
https://git.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685
https://git.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859

Frequently Asked Questions

What is the severity of CVE-2025-38190?: CVE-2025-38190 has not yet been assigned a CVSS score.
How to fix CVE-2025-38190?: To fix CVE-2025-38190, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-38190 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-38190 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-38190?: CVE-2025-38190 affects Linux Linux, Linux Linux.

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