Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mm: swap: fix race between freeswapandcache and swapoff There was previously a theoretical scenario where swapoff could execute and tear down the swapinfostruct while a call to freeswapandcache was running in another thread. This...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Tracing: Fixed a race condition between CPU buffer writes and swapping operations. A warning occurred in rbendcommit at the following line of code: if RBWARNONcpubuffer, !localread&cpubuffer-committing WARNING: CPU: 0 PID: 139 at...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fixed the descriptor address in kvmatswapdesc Using “u64 user hva + offset” to obtain the virtual addresses of S1/S2 descriptors seems incorrect, especially when offset is not zero. What we actually want to get for...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: mm: Fix unexpected zeroed page mapping with zram swap In cases where two processes are cloning under CLONEVM, a user process may be corrupted when zeroed pages are unexpectedly displayed. CPU A | CPU B --- | --- doswappage |...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15

In the Linux kernel, the following vulnerability has been resolved: mm/swap: Fixed the race condition between swapoff and getswappages. The si-lock must be held when deleting the si from the available list. Otherwise, another thread may re-add the si to the available list, which can lead to memor...

Astra Linux – Vulnerability in Linux 5.10

A flaw was discovered in the pfnswapentrytopage function within the memory management subsystem of the Linux kernel. In this flaw, an attacker with local user privileges may cause a denial-of-service attack due to a BUG statement that references pmdt x...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: fix missing folio cleanup in writeback race path In zswapwritebackentry, after obtaining a folio from readswapcacheasync, we reacquire the tree lock to ensure that the swap entry was not invalidated or recycled. If it...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/MADVCOLLAPSE: handling !none !huge !bad pmd lookups In commit 34488399fa08 “mm/madvise: adding file and shmem support to MADVCOLLAPSE”, we made the following change to findpmdorthpornone: – if !pmdpresentpmde return...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: In the mm/pagealloc function, the clearpage-private operation is performed in freepagesprepare. Several subsystems slub, shmem, ttm, etc. use page-private, but they do not clear it before freeing pages. When these pages are later...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/mprotect: Only reference swappfn is called if the type matches. Yu Zhao reported a bug after the commit “mm/swap: Add swpoffsetpfn to fetch PFN from swap entries” added a check in swpoffsetpfn for the swap type 1: Kernel bug a...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mm/shmem, swap: fixed the soft lockup issue with mTHP swapin. The following soft lockup can be easily reproduced on my test machine using the following command: echo always...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: cifs: The xid leak in cifscopyfilerange has been fixed. If the file is used by swap, before returning -EOPNOTSUPP, the xid should be freed. Otherwise, the xid will be leaked...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/hugememory: Do not clobber swpentryt during THP split. The following issue was observed when running stress mmap since the commit b653db77350c: “mm: Clear page-private when splitting or migrating a page.” Watchdog: BUG: Soft...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mm: cachestat: fixed two shmem bugs When cachestat on shmem overlaps with swapping and invalidation, there are two possible bugs: 1 A swapin error may result in a corrupted swap entry in the shmem inode’s xarray. Calling...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: condresched was added to getswappages. A softlockup still occurs in getswappages under memory pressure. With 64 CPU cores, 64GB of memory, and 28 zram devices, the size of each zram device is 50MB, and they all have...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm, swap: fixed a potential UAF issue related to VMA readahead. Since commit 78524b05f1a3 “mm, swap: avoiding redundant swap device pinning”, the common helper function for allocating and preparing a swap entry in the swap cache...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Ring Buffer: Do not swap the cpubuffer during the resize process When the ringbufferswapcpu function is called during the resize process, the cpu buffer is swapped in the middle, resulting in an incorrect state. Continuing to run...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-021574)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-021574 advisory. In the Linux kernel, the following vulnerability has been resolved: mm: fix zswap writeback race condition The zswap writeback mechanism can cause a race condition...

kernel: ring-buffer: Do not trigger WARN_ON() due to a commit_overrun

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not trigger WARNON due to a commitoverrun When reading a memory mapped buffer the reader page is just swapped out with the last page written in the write buffer. If the reader page is the same as the commit buffer...

GHSA-VP62-88P7-QQF5 Docker: Race condition in docker cp allows creation of arbitrary empty files on the host via symlink swap

Summary A race condition during docker cp mount setup allows a malicious container to create empty files or directories at arbitrary absolute paths on the host filesystem. This advisory covers the race during mountpoint creation. The related race during the subsequent mount syscall is tracked in...