DEBIAN-CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

UBUNTU-CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

CVE-2026-89791

CVE-2026-89791 is a use-after-free race condition in the Linux kernel's perf subsystem . The root cause is that perf_mmap_close() drops rb->mmap_count without holding event->mmap_mutex, allowing a concurrent perf_mmap_rb() revival path to free a newly allocated ring buffer that another proc...

CVE-2026-89791 perf: Fix use-after-free when perf mmap() revival races with the last munmap()

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

kernel: selinux: fix overlayfs mmap() and mprotect() access checks

A flaw was found in the Linux kernel's SELinux security module when handling overlayfs. The existing security model for overlayfs does not properly enforce access controls for mmap and mprotect operations. This oversight could allow a local attacker to bypass intended security policies, potential...

kernel: selinux: fix overlayfs mmap() and mprotect() access checks

A flaw was found in the Linux kernel's SELinux security module when handling overlayfs. The existing security model for overlayfs does not properly enforce access controls for mmap and mprotect operations. This oversight could allow a local attacker to bypass intended security policies, potential...

PT-2026-93430

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ublk ch mmap function where it fails to clear the VM MAYWRITE flag on read-only mappings. This allows an unprivileged userspace daemon to map the per-queue command...

CVE-2026-89793: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ublk: clear VMMAYWRITE on read-only ublk char device mmap ublkchmmap rejects mmap requests with VMWRITE set, but never clears VMMAYWRITE on the resulting read-only mapping. This allows a userspace daemon to mmap the per-queue...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: Binder: Fix for use-after-free in shinker’s callback The mmap read lock is used during shinker’s callback, which means that using the alloc-vma pointer is not safe, as it could lead to a race condition with munmap. As of commit...

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

In the Linux kernel, the following vulnerabilities have been resolved: – The faulty behavior of the mm:resolvefaultymmapregion function has been fixed. The mmapregion function is quite problematic, with a confusing control flow and numerous ways in which issues can arise. This leads to incomplete...

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

In the Linux kernel, the following vulnerabilities have been resolved: ocfs2: fixed a recursive semaphore deadlock in the fiemap call syzbot detected a OCFS2 hang due to a recursive semaphore on the FSIOCFIEMAP of the extent list in a specially crafted mmap file. contextswitch...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/powernv/memtrace: A out-of-bounds issue in memtrace mmap has been fixed. The memtrace mmap issue contained a out-of-bounds vulnerability. This patch addresses this issue by ensuring that the requested mapping region size...

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: perf/core: Early exit occurs when perfmmap fails. When perfmmap fails to allocate a buffer, it still invokes the eventmapped callback of the related event. On X86 architecture, this may increase the perfrdpmcallowed reference...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: Fixed a possible warning in privcmdioctlmmapresource. Since ‘kdata.num’ is a user-controlled data, if the user attempts to allocate memory larger than MAXORDER, then kcalloc will fail. This will also generate a stack...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: perf/core: Abrupt exit if the requested AUX area is out of bounds. When using perf-record with a large AUX area, for example 4GB, the following error occurs: bash perf record -C 0 -m ,4G -e armspe0// -- sleep 1 Failed to mmap wit...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mapletree: Fixed the MASTATEPREALLOC flag in maspreallocate. The preallocation flag is temporarily cleared when explicit requests for allocations are made. Existing allocations are already counted against the request through...

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

In the Linux kernel, the following vulnerabilities have been resolved: migrate: corrected lock ordering for hugetlb file folio operations Syzbot has identified a deadlock analyzed by Lance Yang: 1 Task 5749: Holds foliolock, then attempts to acquire immaprwsem read lock. 2 Task 5754: Holds...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: perf/core: Fixed a data race between perfeventsetoutput and perfmmapclose. Yang Jihing reported a race between perfeventsetoutput and perfmmapclose: CPU1 CPU2 perfmmapclosee2 if atomicdecandtest&e2-rb-mmapcount // 1 - 0 then...