In the Linux kernel, the following vulnerability has been resolved: atm: clip: Fix memory leak of struct clip_vcc. ioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to vcc->user_back. The code assumes that vcc_destroy_socket() passes NULL skb to vcc->push() when the socket is close()d, and then clip_push() frees clip_vcc. However, ioctl(ATMARPD_CTRL) sets NULL to vcc->push() in atm_init_atmarp(), resulting in memory leak. Let's serialise two ioctl() by lock_sock() and check vcc->push() in atm_init_atmarp() to prevent memleak.
History

Sat, 16 Aug 2025 11:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: atm: clip: Fix memory leak of struct clip_vcc. ioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to vcc->user_back. The code assumes that vcc_destroy_socket() passes NULL skb to vcc->push() when the socket is close()d, and then clip_push() frees clip_vcc. However, ioctl(ATMARPD_CTRL) sets NULL to vcc->push() in atm_init_atmarp(), resulting in memory leak. Let's serialise two ioctl() by lock_sock() and check vcc->push() in atm_init_atmarp() to prevent memleak.
Title atm: clip: Fix memory leak of struct clip_vcc.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-08-16T11:22:20.477Z

Updated: 2025-08-16T11:22:20.477Z

Reserved: 2025-04-16T04:51:24.024Z

Link: CVE-2025-38546

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2025-08-16T12:15:30.620

Modified: 2025-08-16T12:15:30.620

Link: CVE-2025-38546

cve-icon Redhat

No data.