CVE-2026-74728: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: xfs: handle NULL b_addr in xfs_buf_free When xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with bp->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. 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 Fix this by skipping folio_put() when bp->b_addr is NULL.

Засегнати продукти

• Linux Linux: 5076a6040ca1613e616d84aecfaac5f932db84e0 преди 444ff50ece93060131ad84fbd3f378723d8ac243; 5076a6040ca1613e616d84aecfaac5f932db84e0 преди ccf6738adcafa5ddbddc4e71b45d8a51b86643c7; 5076a6040ca1613e616d84aecfaac5f932db84e0 преди 3aa0c1d23ee1b9d9b340fb2f4736536e1408d706; 5076a6040ca1613e616d84aecfaac5f932db84e0 преди d852729c5f4f830fbe7413df032e29459b3daf83
• Linux Linux: 6.9; преди 6.9; 6.12.114 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-74728
• https://nvd.nist.gov/vuln/detail/CVE-2026-74728
• https://git.kernel.org/stable/c/444ff50ece93060131ad84fbd3f378723d8ac243
• https://git.kernel.org/stable/c/ccf6738adcafa5ddbddc4e71b45d8a51b86643c7
• https://git.kernel.org/stable/c/3aa0c1d23ee1b9d9b340fb2f4736536e1408d706
• https://git.kernel.org/stable/c/d852729c5f4f830fbe7413df032e29459b3daf83