EUVD-2026-38977

In the Linux kernel, the following vulnerability has been resolved: powerpc/pgtable-frag: Fix bad page state in ptefragdestroy powerpc uses ptfragrefcount as a reference counter for tracking it's pte and pmd page table fragments. For PTE table, in case of Hash with 64K pagesize, we have 16...

CVE-2026-53109

CVE-2026-53109 concerns a Linux kernel PowerPC page-table fragment bug. In Hash 64K page setups, pte_frag_destroy can leave a folio active while fragments are freed, causing a “Bad page state” error on exit. The fix involves clearing the folio active flag during do_exit/pagetable teardown and inc...

CVE-2026-53109 powerpc/pgtable-frag: Fix bad page state in pte_frag_destroy

In the Linux kernel, the following vulnerability has been resolved: powerpc/pgtable-frag: Fix bad page state in ptefragdestroy powerpc uses ptfragrefcount as a reference counter for tracking it's pte and pmd page table fragments. For PTE table, in case of Hash with 64K pagesize, we have 16...

EUVD-2026-38976

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unmap race with PMD migration entries The following race is possible with migration swap entries or device-private THP entries. e.g. when movepages is called on a PMD THP page, then there maybe an intermediate...

CVE-2026-53108 powerpc/64s: Fix unmap race with PMD migration entries

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unmap race with PMD migration entries The following race is possible with migration swap entries or device-private THP entries. e.g. when movepages is called on a PMD THP page, then there maybe an intermediate...

CVE-2026-53108

CVE-2026-53108 concerns a race in PowerPC64 (book3s64) PMD migration handling during unmap vs move_pages. The vulnerability arises when a PMD migration entry is created by migrate_pages while an munmap occurs, hitting a VM_BUG_ON in pmdp_huge_get_and_clear_full. The Linux kernel patch (commit a30...

CVE-2026-53108 powerpc/64s: Fix unmap race with PMD migration entries

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unmap race with PMD migration entries The following race is possible with migration swap entries or device-private THP entries. e.g. when movepages is called on a PMD THP page, then there maybe an intermediate...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: powerpc/smp: Added a check for a failure in kcalloc in parsethreadgroups. Since kcalloc may fail, it is necessary to check its return value to prevent a NULL pointer derefrence when passing it to ofpropertyreadu32array...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: powerpc/kexec: Enable SMT before waking offline CPUs. If SMT is disabled or a partial SMT state is enabled, when a new kernel image is loaded for kexec, the following warning is observed upon reboot: kexec: Waking offline cpu 228...

PT-2026-52003

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the powerpc architecture's page table fragment management. The system uses pt frag refcount to track page table fragments. When pte free defer is called during madvise...

PT-2026-52002

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the Linux kernel for powerpc/64s architectures during the unmapping of Page Middle Directory PMD migration entries. The issue occurs when a move pages system...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/kprobes: Fixed a null pointer reference in archpreparekprobe I found a null pointer reference in archpreparekprobe: echo 'p cmdlineprocshow' kprobeevents echo 'p cmdlineprocshow+16' kprobeevents The kernel attempted to re...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/tm: Fixed corruption in user space r13. The commit cf13435b730a “powerpc/tm: Fixed corruption in user space r13” fixes a problem in treclaim, where a SLB miss can occur on threadstruct-ckpt regs, when SCRATCH0 is active a...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fixed the issue where the variable &phb-ioresource was used after calling deviceunregister&hostbridge-dev. However, the unregister operation might have freed phb, since pcibiosfreecontrollerdeferred is the releas...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/memhotplug: Added an addpages override for PPC. With the commit ffa0b64e3be5 “powerpc: Fix virtaddrvalid for 64-bit Book3E & 32-bit”, the kernel now validates the addr against the highmemory value. This results in the...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: Keep MSRRI set when calling RTAS RTAS runs in real mode MSRDR and MSRIR unset and in 32-bit big endian mode MSRSF,LE unset. The change in MSR is done in enterrtas in a relatively complex way, since the MSR value cou...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: powerpc/xive: Fixed the refcount leak in xivespaprinit. offindcompatiblenode returns a node pointer with a refcount incremented; we should use ofnodeput on it after processing. Added ofnodeput to prevent the refcount leak...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Do not use DSISR for SLB faults. Since commit 46ddcb3950a2 “powerpc/mm: Show if a bad page fault on data is read or write”, we use pagefaultiswriteregs-dsisr in badpagefault to determine whether the fault is for a re...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: Fixed a memory leak caused by incorrect chipdata lookups. The reported memory leak involves the following objects: Unreferenced object 0xc0000002a7fbc640 size 64: comm “kworker/8:1”, pid 540, jiffies 4294937872 Hex...

Ubuntu 20.04 LTS : Linux kernel (FIPS) vulnerabilities (USN-7516-8)

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7516-8 advisory. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in...