https://db.gcve.eu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 06 Oct 2026 22:20:22 +0000 https://db.gcve.eu/vuln/cve-2021-47491 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>mm: khugepaged: skip huge page collapse for special files</p> <p>The read-only THP for filesystems will collapse THP for files opened readonly and mapped with VM_EXEC. The intended usecase is to avoid TLB misses for large text segments. But it doesn&#39;t restrict the file types so a THP could be collapsed for a non-regular file, for example, block device, if it is opened readonly and mapped with EXEC permission. This may cause bugs, like [1] and [2].</p> <p>This is definitely not the intended usecase, so just collapse THP for regular files in order to close the attack surface.</p> <p>[shy828301@gmail.com: fix vm_file check [3]]</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>mm: khugepaged: skip huge page collapse for special files</p> <p>The read-only THP for filesystems will collapse THP for files opened readonly and mapped with VM_EXEC. The intended usecase is to avoid TLB misses for large text segments. But it doesn&#39;t restrict the file types so a THP could be collapsed for a non-regular file, for example, block device, if it is opened readonly and mapped with EXEC permission. This may cause bugs, like [1] and [2].</p> <p>This is definitely not the intended usecase, so just collapse THP for regular files in order to close the attack surface.</p> <p>[shy828301@gmail.com: fix vm_file check [3]]</p> https://db.gcve.eu/vuln/cve-2021-47491