CVE-2026-63816

CVE CVE-2026-63816EUVD EUVD-2026-45482Published 2026-07-19T12:02:15.000ZLast changed 2026-08-05T12:36:02.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: f2fs: atomic: fix UAF issue on f2fs_inode_info.atomic_inode - ioctl(F2FS_IOC_GARBAGE_COLLECT_RANGE) - shrink - f2fs_gc - gc_data_segment - ra_data_block(cow_inode) - mapping = F2FS_I(inode)->atomic_inode->i_mapping : f2fs_is_cow_file(cow_inode) is true - f2fs_evict_inode(atomic_inode) - clear_inode_flag(fi->cow_inode, FI_COW_FILE) - F2FS_I(fi->cow_inode)->atomic_inode = NULL ... - truncate_inode_pages_final(atomic_inode) - f2fs_grab_cache_folio(mapping) : create folio in atomic_inode->mapping - clear_inode(atomic_inode) - BUG_ON(atomic_inode->i_data.nrpages) We need to add a reference on fi->atomic_inode before using its mapping field during garbage collection, otherwise, it will cause UAF issue.

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 3db1de0e582c358dd013f3703cd55b5fe4076436 <56038756aae68312df00d4aa1d97e51ef3aca725; 3db1de0e582c358dd013f3703cd55b5fe4076436 <e0288584baa5dc41df4a829a023c4c1b33fe53d7; 5.18.18 <5.19; patch: 7.2-rc1; patch: 6.6.145; 3db1de0e582c358dd013f3703cd55b5fe4076436 <7d3ae21783e5914c1761ac7d63f882d3d70800e9; patch: 6.12.96; 3db1de0e582c358dd013f3703cd55b5fe4076436 <a805fec35c201c59643ddcde713bce4051c8ee27; patch: 6.18.39; 5.19; 6db52f1944417c2601182a591a704e2f119c5215; 3db1de0e582c358dd013f3703cd55b5fe4076436 <a499f77c06050a28c897bdbd86cd2f0721ae0743; patch: 7.1.3; patch: 0

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

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Linux — Linux

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