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CVE-2026-97594: 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: landlock: Fix use-after-free of the source's parent directory current_check_refer_path() reads old_dentry->d_parent without holding a reference nor a lock on it, and then dereferences it in collect_domain_accesses() and in the audit record. A reference on a child does not pin its parent: __d_move() reassigns dentry->d_parent and drops the reference the child held on its former parent. hook_path_rename() is not affected because the rename path calls lock_rename() before the hook, so the source cannot be reparented under it. hook_path_link() has no such protection: filename_linkat() holds a reference on the source dentry but neither locks nor references its parent, so a concurrent rename(2) can reparent the source while security_path_link() runs, and the former parent can then be removed and freed while the hook walks it. A process can trigger this after entering a Landlock domain that handles at least one filesystem access right. The process can then race a linkat(2) loop against rename(2) and rmdir(2): BUG: KASAN: slab-use-after-free in collect_domain_accesses+0x278/0x290 Read of size 4 at addr ffff888160bd53f4 by task llrepro2/549 collect_domain_accesses+0x278/0x290 current_check_refer_path+0x952/0x1120 security_path_link+0x1be/0x320 filename_linkat+0x342/0x6d0 __x64_sys_linkat+0xfa/0x150 Freed by task 562: kmem_cache_free+0x139/0x4c0 i_callback+0x4b/0x80 rcu_core+0x7dc/0x10a0 Take a reference on the dentry selected as the source parent, using dget() for the common-mount-root case and dget_parent() otherwise. Release it after the hierarchy walk and synchronous audit logging. [mic: Clarify the caller, reachability, and reference handling]

    Засегнати продукти

    • Linux Linux: b91c3e4ea756b12b7d992529226edce1cfd854d7 преди 0475440ff8c04be26a88733af0c85f597bb28c0a; b91c3e4ea756b12b7d992529226edce1cfd854d7 преди 48fc1c74052c956c59d5b16b5e18e0dd36b76aa2; b91c3e4ea756b12b7d992529226edce1cfd854d7 преди 4c37992b9668c4f37aae41dd95c369f7b6009915; b91c3e4ea756b12b7d992529226edce1cfd854d7 преди 379efd2ce8b26fd35feb13ccc2f671ff105a5052; b91c3e4ea756b12b7d992529226edce1cfd854d7 преди ba29c46ccfe3ebadfb8aa18149186c49f84b14f8; b91c3e4ea756b12b7d992529226edce1cfd854d7 преди 2c6dc792538260a8087ac5b22c31b3b8e47c85d6
    • Linux Linux: 5.19; преди 5.19; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.112 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-97594: Linux | freedomonline.bg