CVE-2026-89830
CVE CVE-2026-89830EUVD EUVD-2026-80430Published 2026-09-16T10:31:02.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 0; patch: 6.18.51; 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 <2d50b6d47e5671ff6a25834c5906d443356191f0; 6.9; 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 <0f9af07ecc1ab486038373db6ae0436c5d674b19; patch: 7.3-rc1; patch: 6.12.110; patch: 7.2.5; 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 <931e1aa4d44c52ff8e0feb38420a8827c62e886b; 7d009e048d7cfcc21d400f2aba4c8bacbdebbd47 <dde99df5a9d3b0ca6ac0a86f98799685f7399432
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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