CVE-2026-97534
CVE CVE-2026-97534EUVD EUVD-2026-86842Published 2026-09-25T10:21:33.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: f2fs: accurately adjust free_sections during free_segment_range In free_segment_range(), MAIN_SECS(sbi) is temporarily reduced by `secs` to restrict block allocation to the safe remaining main area while valid blocks in the truncated range are evacuated by GC. However, FREE_I(sbi)->free_sections tracks the total number of free sections across the whole filesystem. If any sections within the truncated range were already free upon entering free_segment_range(), failing to deduct them from free_sections causes the filesystem to overestimate available free sections in the active, reduced main area. This leads to inconsistent free section accounting during GC data migration and can trigger unexpected allocation failures or assertion errors when space is tight. Fix this by calculating the number of already-free sections in the truncated range, deducting them from free_sections upon entering free_segment_range(), and restoring them on exit.
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 b4b10061ef98c583bcf82a4200703fbaa98c18dc <8c963d1738fdca400082ff5f9d99e083de4f4e70; b4b10061ef98c583bcf82a4200703fbaa98c18dc <8a123a10770d2132d046748f20f02baa8d5539a1; 5.8; patch: 7.3-rc1; patch: 6.18.53; patch: 0; patch: 7.2.7; b4b10061ef98c583bcf82a4200703fbaa98c18dc <ca31116fad0954c61a0d38163cc51c48e4981b75
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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