https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 02:56:36 +0000 https://vulnerability.circl.lu/vuln/cve-2026-74728 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>xfs: handle NULL b_addr in xfs_buf_free</p> <p>When xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with bp-&gt;b_addr still NULL. The code falls through to the folio_put path which calls virt_to_folio(NULL), dereferencing an invalid address and causing a kernel crash.</p> <p>Call Trace: xfs_buf_free+0x25f/0x510 xfs_buf_alloc+0xc98/0x19b0 xfs_buf_find_insert+0x55/0x14d0 xfs_buf_get_map+0x122b/0x17c0 xfbtree_init_leaf_block+0x11c/0x4a0 xfbtree_init+0x1bb/0x460 xrep_rmap_setup_scan+0x100/0x1f0 xrep_rmapbt+0x41/0xc0</p> <p>Fix this by skipping folio_put() when bp-&gt;b_addr is NULL.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>xfs: handle NULL b_addr in xfs_buf_free</p> <p>When xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with bp-&gt;b_addr still NULL. The code falls through to the folio_put path which calls virt_to_folio(NULL), dereferencing an invalid address and causing a kernel crash.</p> <p>Call Trace: xfs_buf_free+0x25f/0x510 xfs_buf_alloc+0xc98/0x19b0 xfs_buf_find_insert+0x55/0x14d0 xfs_buf_get_map+0x122b/0x17c0 xfbtree_init_leaf_block+0x11c/0x4a0 xfbtree_init+0x1bb/0x460 xrep_rmap_setup_scan+0x100/0x1f0 xrep_rmapbt+0x41/0xc0</p> <p>Fix this by skipping folio_put() when bp-&gt;b_addr is NULL.</p> https://vulnerability.circl.lu/vuln/cve-2026-74728