Към съдържанието

CVE-2026-31597: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY filemap_fault() may drop the mmap_lock before returning VM_FAULT_RETRY, as documented in mm/filemap.c: "If our return value has VM_FAULT_RETRY set, it's because the mmap_lock may be dropped before doing I/O or by lock_folio_maybe_drop_mmap()." When this happens, a concurrent munmap() can call remove_vma() and free the vm_area_struct via RCU. The saved 'vma' pointer in ocfs2_fault() then becomes a dangling pointer, and the subsequent trace_ocfs2_fault() call dereferences it -- a use-after-free. Fix this by saving ip_blkno as a plain integer before calling filemap_fault(), and removing vma from the trace event. Since ip_blkno is copied by value before the lock can be dropped, it remains valid regardless of what happens to the vma or inode afterward.

    Засегнати продукти

    • Linux Linux: 614a9e849ca6ea24843795251cb30af525d5336b преди 36539c4d536f851a3b346a6ebb27b51bc3d77a94; 614a9e849ca6ea24843795251cb30af525d5336b преди 35c2c05261d6f6d84aaa1355afa201d507943e76; 614a9e849ca6ea24843795251cb30af525d5336b преди 3f5e74b5db9353b01ed50f4de84e75b755f8fbc2; 614a9e849ca6ea24843795251cb30af525d5336b преди 6f072daefcab1d84ce37c073645615f63be91006; 614a9e849ca6ea24843795251cb30af525d5336b преди 4cf2768a0291a0cdd0dae801ea0eafa3878a349d; 614a9e849ca6ea24843795251cb30af525d5336b преди d45ff441b416d4aa1af72b1db23d959601c04da2; 614a9e849ca6ea24843795251cb30af525d5336b преди 76a602fdbb78dd05b2da06f74a988cebc97e82d0; 614a9e849ca6ea24843795251cb30af525d5336b преди 925bf22c1b823e231b1baea761fe8a1512e442f2; 614a9e849ca6ea24843795251cb30af525d5336b преди 7de554cabf160e331e4442e2a9ad874ca9875921
    • Linux Linux: 2.6.39; преди 2.6.39; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.83 до 6.12.*; 6.18.24 до 6.18.*; 6.19.14 до 6.19.*; 7.0.1 до 7.0.*; 7.1 до *

    История

    • 24 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31597: Linux | freedomonline.bg