CVE-2021-47544

CVE-2021-47544 : Linux kernel TCP path shows page frag corruption on a page fault, resolved by a patch that fixes nested sk_page_frag() usage during page faults involving CIFS-mapped user buffers. Root cause: page fault handling can initiate an SMB transaction on a different socket within the sam...

CVE-2021-47491

In the Linux kernel, the following vulnerability has been resolved: mm: khugepaged: skip huge page collapse for special files The read-only THP for filesystems will collapse THP for files opened readonly and mapped with VMEXEC. The intended usecase is to avoid TLB misses for large text segments...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

CVE-2021-47492

In the Linux kernel, the following vulnerability has been resolved: mm, thp: bail out early in collapsefile for writeback page Currently collapsefile does not explicitly check PGwriteback, instead, pagehasprivate and trytoreleasepage are used to filter writeback pages. This does not work for xfs...

CVE-2021-47492

In the Linux kernel, the following vulnerability has been resolved: mm, thp: bail out early in collapsefile for writeback page Currently collapsefile does not explicitly check PGwriteback, instead, pagehasprivate and trytoreleasepage are used to filter writeback pages. This does not work for xfs...

CVE-2021-47491

In the Linux kernel, the following vulnerability has been resolved: mm: khugepaged: skip huge page collapse for special files The read-only THP for filesystems will collapse THP for files opened readonly and mapped with VMEXEC. The intended usecase is to avoid TLB misses for large text segments...

CVE-2021-47491

In the Linux kernel, the following vulnerability has been resolved: mm: khugepaged: skip huge page collapse for special files The read-only THP for filesystems will collapse THP for files opened readonly and mapped with VMEXEC. The intended usecase is to avoid TLB misses for large text segments...

CVE-2021-47491

CVE-2021-47491 concerns the Linux kernel vulnerability in mm: khugepaged, where read-only THP for filesystems could collapse THP for readonly/executable mappings of non-regular files (e.g., block devices). The root cause is that THP collapse was allowed for such files due to an insufficient vm_fi...

CVE-2021-47492 mm, thp: bail out early in collapse_file for writeback page

In the Linux kernel, the following vulnerability has been resolved: mm, thp: bail out early in collapsefile for writeback page Currently collapsefile does not explicitly check PGwriteback, instead, pagehasprivate and trytoreleasepage are used to filter writeback pages. This does not work for xfs...

CVE-2021-47492

CVE-2021-47492 concerns a Linux kernel vulnerability in the memory management (mm) subsystem, specifically the THP collapse_file path. The issue arises because collapse_file does not explicitly check PG_writeback and uses page_has_private/try_to_release_page to filter writeback pages. This is pro...

CVE-2021-47492 mm, thp: bail out early in collapse_file for writeback page

In the Linux kernel, the following vulnerability has been resolved: mm, thp: bail out early in collapsefile for writeback page Currently collapsefile does not explicitly check PGwriteback, instead, pagehasprivate and trytoreleasepage are used to filter writeback pages. This does not work for xfs...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

CVE-2021-47470

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential use-after-free in slabdebugfsfops When sysfsslabadd failed, we shouldn't call debugfsslabadd for s because s will be freed soon. And slabdebugfsfops will use s later leading to a use-after-free...

CVE-2021-47470 mm, slub: fix potential use-after-free in slab_debugfs_fops

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential use-after-free in slabdebugfsfops When sysfsslabadd failed, we shouldn't call debugfsslabadd for s because s will be freed soon. And slabdebugfsfops will use s later leading to a use-after-free...

CVE-2021-47466 mm, slub: fix potential memoryleak in kmem_cache_open()

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmemcacheopen In error path, the randomseq of slub cache might be leaked. Fix this by using kmemcacherelease to release all the relevant resources...

CVE-2021-47466 mm, slub: fix potential memoryleak in kmem_cache_open()

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmemcacheopen In error path, the randomseq of slub cache might be leaked. Fix this by using kmemcacherelease to release all the relevant resources...

CVE-2021-47463 mm/secretmem: fix NULL page->mapping dereference in page_is_secretmem()

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

DEBIAN-CVE-2021-47350

In the Linux kernel, the following vulnerability has been resolved: powerpc/mm: Fix lockup on kernel exec fault The powerpc kernel is not prepared to handle exec faults from kernel. Especially, the function isexecfault will return 'false' when an exec fault is taken by kernel, because the check i...

CVE-2021-47221

In the Linux kernel, the following vulnerability has been resolved: mm/slub: actually fix freelist pointer vs redzoning It turns out that SLUB redzoning "slubdebug=Z" checks from s-objectsize rather than from s-inuse which is normally bumped to make room for the freelist pointer, so a cache creat...