CVE-2024-42233

In the Linux kernel, a vulnerability was fixed by replacing pteoffsetmap with pteoffsetmapnolock in the filemapfaultrecheckptenone function. The original use of pteoffsetmap relied on a potentially stale page table lock PTL, which could lead to a use-after-free UAF condition if the page table was...

CVE-2024-42233

In the Linux kernel, the following vulnerability has been resolved: filemap: replace pteoffsetmap with pteoffsetmapnolock The vmf-ptl in filemapfaultrecheckptenone is still set from handleptefault. But at the same time, we did a pteunmapvmf-pte. After a pteunmapvmf-pte unmap and rcureadunlock, th...

UBUNTU-CVE-2024-42233

In the Linux kernel, the following vulnerability has been resolved: filemap: replace pteoffsetmap with pteoffsetmapnolock The vmf-ptl in filemapfaultrecheckptenone is still set from handleptefault. But at the same time, we did a pteunmapvmf-pte. After a pteunmapvmf-pte unmap and rcureadunlock, th...

CVE-2024-42233 filemap: replace pte_offset_map() with pte_offset_map_nolock()

In the Linux kernel, the following vulnerability has been resolved: filemap: replace pteoffsetmap with pteoffsetmapnolock The vmf-ptl in filemapfaultrecheckptenone is still set from handleptefault. But at the same time, we did a pteunmapvmf-pte. After a pteunmapvmf-pte unmap and rcureadunlock, th...

CVE-2024-42233

CVE-2024-42233 concerns a Linux kernel issue in filemap_fault_recheck_pte_none() where a stale PTL could lead to a use-after-free after pte_unmap(). The fix replaces pte_offset_map() with pte_offset_map_nolock(), removing reliance on the PTL to protect the page table. Exploitation details are not...

CVE-2024-42233 filemap: replace pte_offset_map() with pte_offset_map_nolock()

In the Linux kernel, the following vulnerability has been resolved: filemap: replace pteoffsetmap with pteoffsetmapnolock The vmf-ptl in filemapfaultrecheckptenone is still set from handleptefault. But at the same time, we did a pteunmapvmf-pte. After a pteunmapvmf-pte unmap and rcureadunlock, th...

CVE-2024-42233 filemap: replace pte_offset_map() with pte_offset_map_nolock()

In the Linux kernel, the following vulnerability has been resolved: filemap: replace pteoffsetmap with pteoffsetmapnolock The vmf-ptl in filemapfaultrecheckptenone is still set from handleptefault. But at the same time, we did a pteunmapvmf-pte. After a pteunmapvmf-pte unmap and rcureadunlock, th...