CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HIn the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix memory accounting for pinned/unpinned pages The account_mem() and unaccount_mem() functions call get_uid() which increments the reference count of struct user_struct on every invocation. But we don't decrement the count by calling free_uid(). It also accounted/unaccounted the pages against the current->mm. But its possible the unaccount_mem() can be called from a different process context than the one that originally pinned the pages. Let's fix this by storing the pinning process user_struct and mm_struct when accounting for pinned pages, and subsequently free these resources when the pages are unpinned. [[email protected]: Fixed whitespace] A flaw was found in the KVM (Kernel-based Virtual Machine) s390 PCI component. Incorrect memory accounting in the `account_mem()` and `unaccount_mem()` functions, specifically related to the handling of pinned and unpinned pages, can lead to a resource leak. This occurs because the reference count for user structures is not properly decremented, and memory accounting might be performed in a different process context than the one that originally pinned the pages. This issue could potentially lead to resource exhaustion, resulting in a Denial of Service (DoS) for the system.
Multiple vulnerabilities have been discovered in the Linux kernel of Debian. These vulnerabilities allow for privilege escalation, data compromise, and denial of service. The affected Debian versions are prior to 6.12.10…