https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-05T11:53:18.852302+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-72412 CVE-2026-72412 — s390/mm: Fix handling of _PAGE_UNUSED pte bit 2026-10-05T11:53:18.876156+00:00

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

s390/mm: Fix handling of _PAGE_UNUSED pte bit

The _PAGE_UNUSED softbit should not really be lying around. Its sole purpose is to signal to try_to_unmap_one() and try_to_migrate_one() that the page can be discarded instead of being moved / swapped.

KVM has no way to know why a page is being unmapped, so it sets the bit on userspace ptes corresponding to unused guest pages every time they get unmapped. KVM has no reasonable way to clear the bit once the page is in use again.

While set_ptes() checks and clears the bit, other paths that set new ptes did not. This led to used pages being thrown out as if they were unused, causing guest corruption.

Fix the issue by clearing the _PAGE_UNUSED bit for present ptes in set_pte(), i.e. whenever a present pte is getting set. The check in set_ptes() is then redundant and can be removed.

Also fix gmap_helper_try_set_pte_unused() to only set the bit if the pte is present; the _PAGE_UNUSED bit is only defined for present ptes and thus should not be set for non-present ptes.

 https://vulnerability.circl.lu/vuln/usn-8816-1 USN-8816-1 — linux, linux-aws, linux-aws-7.0, linux-hwe-7.0, linux-ibm, linux-oracle, linux-raspi, linux-realtime vulnerabilities 2026-10-05T11:53:18.876293+00:00

Affected: Ubuntu:24.04:LTS: linux-aws-7.0, Ubuntu:24.04:LTS: linux-hwe-7.0, Ubuntu:26.04:LTS: linux, Ubuntu:26.04:LTS: linux-aws, Ubuntu:26.04:LTS: linux-ibm, Ubuntu:26.04:LTS: linux-oracle, Ubuntu:26.04:LTS: linux-raspi, Ubuntu:26.04:LTS: linux-realtime

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; - InfiniBand drivers; - IOMMU subsystem; - Multiple devices driver; - Network drivers; - Microsoft Azure Network Adapter (MANA) driver; - NVME drivers; - TCM subsystem; - Virtio Host (VHOST) subsystem; - Xen hypervisor drivers; - AFS file system; - File systems infrastructure; - Network file systems library; - Network file system (NFS) client; - NTFS3 file system; - OCFS2 file system; - OrangeFS file system; - SMB network file system; - IPv4 networking; - Sun RPC protocol; - IPv6 networking; - IP tunnels definitions; - Netfilter; - TCP network protocol; - Locking primitives; - 9P file system network protocol; - B.A.T.M.A.N. meshing protocol; - Networking core; - IFE protocol; - RxRPC session sockets; - Network traffic control; - SCTP protocol; - SMC sockets; - TIPC protocol; - XFRM subsystem; (CVE-2026-64530, CVE-2026-64534, CVE-2026-64535, CVE-2026-64541, CVE-2026-64551, CVE-2026-68083, CVE-2026-68457, CVE-2026-68476, CVE-2026-68477, CVE-2026-72014, CVE-2026-72020, CVE-2026-72033, CVE-2026-72041, CVE-2026-72046, CVE-2026-72064, CVE-2026-72065, CVE-2026-72069, CVE-2026-72083, CVE-2026-72084, CVE-2026-72085, CVE…