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medium5.5

CVE-2025-38190

In the Linux kernel, the following vulnerability has been resolved: atm: Revert atm_account_tx() if copy_from_iter_full() fails.

Impact

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~

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 2.6.13 before 5.4.295
from 5.5 before 5.10.239
from 5.11 before 5.15.186
from 5.16 before 6.1.142
from 6.2 before 6.6.95
from 6.7 before 6.12.35
DebianDebian Linux
Version 11.0

References