In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Check for invalid/obsolete root *after* making MMU pages available Check for a "stale" page fault, i.e. for an invalid and/or obsolete root, after making MMU pages available for the shadow MMU. If reclaiming shadow pages zaps an in-use root, i.e. marks it invalid, then KVM will attempt to map memory into an invalid root. On its own, populating an invalid root is "fine", but because child shadow pages inherit their parent's role, any children created during the map/fetch will be created as invalid pages, thus violating KVM's invariant that invalid pages are never on the list of active MMU pages. Note, the underlying flaw has existed since KVM first started tracking invalid roots in 2008 (commit 2e53d63acba7, "KVM: MMU: ignore zapped root pagetables"), but the true badness only came along in 2020 (Linux 5.9) with the invariant that invalid shadow pages can't be on the list of active pages. Note #2, inherit...

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Check for invalid/obsolete root *after* making MMU pages available Check for a "stale" page fault, i.e. for an invalid and/or obsolete root, after making MMU pages available for the shadow MMU. If reclaiming shadow pages zaps an in-use root, i.e. marks it invalid, then KVM will attempt to map memory into an invalid root. On its own, populating an invalid root is "fine", but because child shadow pages inherit their parent's role, any children created during the map/fetch will be created as invalid pages, thus violating KVM's invariant that invalid pages are never on the list of active MMU pages. Note, the underlying flaw has existed since KVM first started tracking invalid roots in 2008 (commit 2e53d63acba7, "KVM: MMU: ignore zapped root pagetables"), but the true badness only came along in 2020 (Linux 5.9) with the invariant that invalid shadow pages can't be on the list of active pages. Note #2, inheri

KVM: x86: Check for invalid/obsolete root *after* making MMU pages available

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

Important: kernel security, bug fix, and enhancement update

ELSA-2026-53329: kernel security, bug fix, and enhancement update (IMPORTANT)

Important: kernel security, bug fix, and enhancement update

ELSA-2026-53330: kernel security, bug fix, and enhancement update (IMPORTANT)

In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Make Safe-RET robust against interrupt injection An attacker injecting interrupts while the Safe-RET mitigation executes on machines affected by SRSO can neutralize the safe return sequence, potentially leading to data leakage through speculative execution. Fixup register state as if the Safe-RET sequence executed successfully by "emulating" it, in a manner of speaking, and avoid executing a RET instruction after returning from the interrupt.

Уязвимость ядра операционной системы Linux, связанная с раскрытием информации при передаче данных, позволяющая нарушителю вызвать отказ в обслуживании

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Check for invalid/obsolete root *after* making MMU pages available Check for a "stale" page fault, i.e. for an invalid and/or obsolete root, after making MMU pages available for the shadow MMU. If reclaiming shadow pages zaps an in-use root, i.e. marks it invalid, then KVM will attempt to map memory into an invalid root. On its own, populating an invalid root is "fine", but because child shadow pages inherit their parent's role, any children created during the map/fetch will be created as invalid pages, thus violating KVM's invariant that invalid pages are never on the list of active MMU pages. Note, the underlying flaw has existed since KVM first started tracking invalid roots in 2008 (commit 2e53d63acba7, "KVM: MMU: ignore zapped root pagetables"), but the true badness only came along in 2020 (Linux 5.9) with the invariant that invalid shadow pages can't be on the list of active pages. Note #2, inh...

Уязвимость механизма управления теневыми таблицами страниц (Shadow MMU) подсистемы виртуализации Kernel-based Virtual Machine (KVM) ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии, выполнить произвольный код или вызвать отказ в обслуживании

ELBA-2026-500163: Unbreakable Enterprise kernel bug fix update (NA)

ELSA-2026-500249: Unbreakable Enterprise kernel security update (IMPORTANT)

ELSA-2026-500238: Unbreakable Enterprise kernel security update (IMPORTANT)

Security update for the Linux Kernel (Live Patch 19 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 56 for SUSE Linux Enterprise 15 SP4)

Security update for the Linux Kernel (Live Patch 57 for SUSE Linux Enterprise 15 SP4)

Important: kernel security update

Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP7)