CVE-2026-89830: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix valid block count leak on data block allocation failure In __allocate_data_block(), when allocating a new data block (dn->data_blkaddr == NULL_ADDR), inc_valid_block_count() is called first to increment total_valid_block_count and i_blocks. If the subsequent f2fs_allocate_data_block() fails, the function returns the error directly without rolling back the already-incremented block counts, causing a permanent leak. Fix this by calling dec_valid_block_count() to undo the increment before returning the error. The condition old_blkaddr == NULL_ADDR precisely identifies the case where inc_valid_block_count() was called.

Засегнати продукти

• Linux Linux: 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 преди 2d50b6d47e5671ff6a25834c5906d443356191f0; 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 преди dde99df5a9d3b0ca6ac0a86f98799685f7399432; 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 преди 931e1aa4d44c52ff8e0feb38420a8827c62e886b; 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 преди 0f9af07ecc1ab486038373db6ae0436c5d674b19
• Linux Linux: 6.9; преди 6.9; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89830
• https://nvd.nist.gov/vuln/detail/CVE-2026-89830
• https://git.kernel.org/stable/c/2d50b6d47e5671ff6a25834c5906d443356191f0
• https://git.kernel.org/stable/c/dde99df5a9d3b0ca6ac0a86f98799685f7399432
• https://git.kernel.org/stable/c/931e1aa4d44c52ff8e0feb38420a8827c62e886b
• https://git.kernel.org/stable/c/0f9af07ecc1ab486038373db6ae0436c5d674b19