Към съдържанието
Търсене

CVE-2026-74359: 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.

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: configfs_lookup(): don't leave ->s_dentry dangling on failure Normally ->s_dentry is cleared when dentry it's pointing to becomes negative (on eviction, realistically). However, that only happens if dentry gets to be positive in the first place; in case of inode allocation failure dentry never becomes positive, so ->d_iput() is not called at all. We do part of what normally would've been done by configfs_d_iput() (dropping the reference to configfs_dirent) manually, but we do not clear ->s_dentry there. Sloppy as it is, it does not matter in case of configfs_create_{dir,link}() - there configfs_dirent does not survive dropping the sole reference to it. However, for configfs_lookup() it *does* survive, with a dangling pointer to soon to be freed dentry sitting it its ->s_dentry. Subsequent getdents(2) in that directory will end up dereferencing that pointer in order to pick the inode number. Use after free... This is the minimal fix; the right approach is to set the linkage between dentry and configfs_dirent only after we know that we have an inode, but that takes more surgery and the bug had been there since 2006, so...

Засегнати продукти

  • Linux Linux: 3d0f89bb169482d26d5aa4e82e763077e7e9bc4d преди 3e83b2203aa59bd279e4f677ec793d49dc9d019e; 3d0f89bb169482d26d5aa4e82e763077e7e9bc4d преди b6e9c82522ddaa3ac0706b295ff4a71975d4f883; 3d0f89bb169482d26d5aa4e82e763077e7e9bc4d преди eee07d769da5ac4e4f7bd0bc17828646a318d499; 3d0f89bb169482d26d5aa4e82e763077e7e9bc4d преди 9c747dcee164ead300de90550ad9e4122f0d1bbb; 3d0f89bb169482d26d5aa4e82e763077e7e9bc4d преди c3b073a209a9baa691b744318ac929fecdd8847c; 3d0f89bb169482d26d5aa4e82e763077e7e9bc4d преди 57088b06109f3222963c639d8d743f42c2899b13; 3d0f89bb169482d26d5aa4e82e763077e7e9bc4d преди 10da12d352b7b2bb330a8609fdda9a58bf0e9856
  • Linux Linux: 2.6.16; преди 2.6.16; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74359: Linux | freedomonline.bg