CVE-2024-49964 mm/hugetlb: fix memfd_pin_folios free_huge_pages leak

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix memfdpinfolios freehugepages leak memfdpinfolios followed by unpinfolios fails to restore freehugepages if the pages were not already faulted in, because the folio refcount for pages created by memfdallocfolio nev...

CVE-2024-49885 mm, slub: avoid zeroing kmalloc redzone

In the Linux kernel, the following vulnerability has been resolved: mm, slub: avoid zeroing kmalloc redzone Since commit 946fa0dbf2d8 "mm/slub: extend redzone check to extra allocated kmalloc space than requested", setting origsize treats the wasted space objectsize - origsize as a redzone. Howev...

CVE-2024-49885

CVE-2024-49885: Linux kernel mm/slub kmalloc redzone issue resolved. Root cause: orig_size handling treated wasted space as redzone and, with init_on_free=1, clears full object->size including metadata, causing check_object() to misclassify the object as redzone. Fix: clear the used area using...

CVE-2024-49885 mm, slub: avoid zeroing kmalloc redzone

In the Linux kernel, the following vulnerability has been resolved: mm, slub: avoid zeroing kmalloc redzone Since commit 946fa0dbf2d8 "mm/slub: extend redzone check to extra allocated kmalloc space than requested", setting origsize treats the wasted space objectsize - origsize as a redzone. Howev...

CVE-2024-49873 mm/filemap: fix filemap_get_folios_contig THP panic

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-2024-49873

CVE-2024-49873 : In the Linux kernel, memfd_pin_folios with THP-backed memory may panic or cause a NULL-pointer dereference when the requested start offset is not aligned to a huge page boundary. The issue arises because filemap_get_folios_contig could load a folio that is a sibling and then fail...

CVE-2024-49872 mm/gup: fix memfd_pin_folios alloc race panic

In the Linux kernel, the following vulnerability has been resolved: mm/gup: fix memfdpinfolios alloc race panic If memfdpinfolios tries to create a hugetlb page, but someone else already did, then folio gets the value -EEXIST here: folio = memfdallocfoliomemfd, startidx; if ISERRfolio ret =...

CVE-2024-49872

The CVE-2024-49872 issue affects the Linux kernel in mm/gup where memfd_pin_folios can race when creating a hugetlb folio and another actor has already done so, leading to a -EEXIST and a panicking folio_put call if the same folio is used in the next loop iteration. The patch fixes the race by cl...

CVE-2024-47745

In the Linux kernel, the following vulnerability has been resolved: mm: call the securitymmapfile LSM hook in remapfilepages The remapfilepages syscall handler calls dommap directly, which doesn't contain the LSM security check. And if the process has called personalityREADIMPLIESEXEC before and...

CVE-2024-47745 mm: call the security_mmap_file() LSM hook in remap_file_pages()

In the Linux kernel, the following vulnerability has been resolved: mm: call the securitymmapfile LSM hook in remapfilepages The remapfilepages syscall handler calls dommap directly, which doesn't contain the LSM security check. And if the process has called personalityREADIMPLIESEXEC before and...

CVE-2022-48991: Use After Free

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-2024-50017: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: x86/mm/identmap: Use gbpages only where full GB page should be mapped. When identpudinit uses only GB pages to create identity maps, large ranges of addresses not actually requested can be included in the resulting table; a 4K...

CVE-2024-49873: NULL Pointer Dereference

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...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel that stems from the mm component not performing LSM security checks in the remapfilepages system call...

CVE-2022-48996: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damonsysfssetschemes Commit da87878010e5 "mm/damon/sysfs: support online inputs update" made 'damonsysfssetschemes' to be called for running DAMON context,...

CVE-2024-47676: Use After Free

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway Syzbot reports a UAF in hugetlbfault. This happens because vmfanonprepare could drop the per-VMA lock and allow the current VMA to be freed before hugetlbvmaunlockread is...

CVE-2024-49964: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix memfdpinfolios freehugepages leak memfdpinfolios followed by unpinfolios fails to restore freehugepages if the pages were not already faulted in, because the folio refcount for pages created by memfdallocfolio nev...

CVE-2024-49872: Concurrent Execution using Shared Resource with Improper Synchronization

In the Linux kernel, the following vulnerability has been resolved: mm/gup: fix memfdpinfolios alloc race panic If memfdpinfolios tries to create a hugetlb page, but someone else already did, then folio gets the value -EEXIST here: folio = memfdallocfoliomemfd, startidx; if ISERRfolio ret =...

CVE-2024-47674

In the Linux kernel, the following vulnerability has been resolved: mm: avoid leaving partial pfn mappings around in error case As Jann points out, PFN mappings are special, because unlike normal memory mappings, there is no lifetime information associated with the mapping - it is just a raw...

CVE-2024-47674

In the Linux kernel, the following vulnerability has been resolved: mm: avoid leaving partial pfn mappings around in error case As Jann points out, PFN mappings are special, because unlike normal memory mappings, there is no lifetime information associated with the mapping - it is just a raw...