CVE-2026-43178 POC (Proof-of-Concept)

In the Linux kernel, the following vulnerability has been resolved:
procfs: fix possible double mmput() in do_procmap_query()
When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY
we return with -ENAMETOOLONG error. After recent changes this condition
happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(),
so original goto out is now wrong and will double-mmput() mm_struct. Fix
by jumping further to clean up only vm_file and name_buf.

Published: 2026-05-06

CVSS: 7.8

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Download CVE-2026-43178 POC (Proof-of-Concept) here:

Tip: Download official Tor Browser at https://www.torproject.org/download/ to access .onion links.

https://hokyo.gr/poc-143-cve-2025-63547/

https://hokyo.gr/poc-771-cve-2026-33111/

https://hokyo.gr/poc-269-cve-2026-42376/

https://hokyo.gr/poc-226-cve-2026-33846/

https://hokyo.gr/poc-420-cve-2026-40280/