Linux 6.6 Race Condition

Summary I found a security-relevant race between mremap and THP code. Reaching the buggy code typically requires the ability to create unprivileged namespaces. The bug leads to installing physical address 0 as a page table, which is likely exploitable in several ways: For example, triggering the...

CVE-2024-53079

In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing listdel corruptions, "Bad page state"s and worse I kee...

SUSE CVE-2024-53079

In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing listdel corruptions, "Bad page state"s and worse I kee...

AZL-53867 CVE-2024-53079 affecting package kernel for versions less than 6.6.64.2-1

In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing listdel corruptions, "Bad page state"s and worse I kee...

CVE-2024-53079

In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing listdel corruptions, "Bad page state"s and worse I kee...

CVE-2024-53079

CVE-2024-53079 affects the Linux kernel’s memory management (mm/thp) with a fix for the deferred split unqueue naming and locking. The description details races in THP deferred split queues under load, causing list_del corruptions and “Bad page state” issues, linked to changes around 6.8 (mTHP), ...

CVE-2024-53079 mm/thp: fix deferred split unqueue naming and locking

In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing listdel corruptions, "Bad page state"s and worse I kee...

CVE-2024-53079 mm/thp: fix deferred split unqueue naming and locking

In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing listdel corruptions, "Bad page state"s and worse I kee...

CVE-2024-53079: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing listdel corruptions, "Bad page state"s and worse I kee...

CVE-2024-50066

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix movenormalpmd/retractpagetables race In mremap, movepagetables looks at the type of the PMD entry and the specified address range to figure out by which method the next chunk of page table entries should be moved. ...

CVE-2024-50066

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix movenormalpmd/retractpagetables race In mremap, movepagetables looks at the type of the PMD entry and the specified address range to figure out by which method the next chunk of page table entries should be moved. ...

CVE-2024-50066 mm/mremap: fix move_normal_pmd/retract_page_tables race

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix movenormalpmd/retractpagetables race In mremap, movepagetables looks at the type of the PMD entry and the specified address range to figure out by which method the next chunk of page table entries should be moved. ...

CVE-2024-50066

CVE-2024-50066 is a Linux kernel race in mm/mremap where move_page_tables can race with retract_page_tables under THP/rmap locking. The flaw stems from reading the PMD type before acquiring rmap locks, potentially creating bogus PMD entries (e.g., mapping page 0 as a page table on x86) and enabli...

CVE-2024-50066 mm/mremap: fix move_normal_pmd/retract_page_tables race

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix movenormalpmd/retractpagetables race In mremap, movepagetables looks at the type of the PMD entry and the specified address range to figure out by which method the next chunk of page table entries should be moved. ...

CVE-2024-50066 mm/mremap: fix move_normal_pmd/retract_page_tables race

In the Linux kernel, the following vulnerability has been resolved: mm/mremap: fix movenormalpmd/retractpagetables race In mremap, movepagetables looks at the type of the PMD entry and the specified address range to figure out by which method the next chunk of page table entries should be moved. ...

PT-2024-10100

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.6.58 Description The issue is related to a race condition in the move page tables function, specifically between move normal pmd and retract page tables in the THP code. This can lead to the creation of bogus P...

CVE-2024-49873

In the Linux kernel, the following vulnerability has been resolved: mm/filemap: fix filemapgetfolioscontig THP panic Patch series "memfd-pin huge page fixes". Fix multiple bugs that occur when using memfdpinfolios with hugetlb pages and THP. The hugetlb bugs only bite when the page is not yet...

CVE-2022-48991

In the Linux kernel, the following vulnerability has been resolved: mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths Any codepath that zaps page table entries must invoke MMU notifiers to ensure that secondary MMUs like KVM don't keep accessing pages which aren't mapped anymore...

CVE-2022-48991

The CVE-2022-48991 entry corresponds to a Linux kernel issue in mm/khugepaged where MMU notifiers must be invoked in shmem/file collapse paths. The vulnerability could allow page use-after-free on pages mirrored by secondary MMUs (e.g., KVM) if present PTEs are removed without proper notification...

CVE-2022-48991 mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths

In the Linux kernel, the following vulnerability has been resolved: mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths Any codepath that zaps page table entries must invoke MMU notifiers to ensure that secondary MMUs like KVM don't keep accessing pages which aren't mapped anymore...