CVE-2026-63817
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
f2fs: validate compress cache inode only when enabled
In the Linux kernel, the following vulnerability has been resolved: f2fs: validate compress cache inode only when enabled F2FS_COMPRESS_INO() uses NM_I(sbi)->max_nid as the synthetic inode number for the compressed page cache inode. That inode only exists when the compress_cache mount option is enabled. When compress_cache is disabled, max_nid is outside the valid inode range. A corrupted directory entry that points to ino == max_nid should therefore be rejected by f2fs_check_nid_range(). However, is_meta_ino() currently treats F2FS_COMPRESS_INO() as a meta inode unconditionally, so f2fs_iget() bypasses do_read_inode() and its nid range check, and instantiates a fake internal inode instead. Gate the compressed cache inode case on COMPRESS_CACHE, matching f2fs_init_compress_inode(). With compress_cache disabled, ino == max_nid now follows the normal inode path and is rejected as an out-of-range nid.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6ce19aff0b8cd386860855185c6cd79337fc4d2b | affected | git | fcc051d377a9701a452e7663a1a8223c26225df9 | Unavailable | None listed |
| 6ce19aff0b8cd386860855185c6cd79337fc4d2b | affected | git | 29115b8c9172d34e67ab26cc4f6c209b7a236d7a | Unavailable | None listed |
| 6ce19aff0b8cd386860855185c6cd79337fc4d2b | affected | git | 13e4b59d3a9413f66f116fa6c4828519b960a5ea | Unavailable | None listed |
| 6ce19aff0b8cd386860855185c6cd79337fc4d2b | affected | git | 16161444c30d8dff9428abbae42b72ce4e32a932 | Unavailable | None listed |
| 6ce19aff0b8cd386860855185c6cd79337fc4d2b | affected | git | 77f216ff9ce5cde8eed9f6d12707e906dffdc9f7 | Unavailable | None listed |
| 6ce19aff0b8cd386860855185c6cd79337fc4d2b | affected | git | 0969926d987bbde9a1aa49da317582ba37095805 | Unavailable | None listed |
| 6ce19aff0b8cd386860855185c6cd79337fc4d2b | affected | git | 5073c66a96a9c23c0c2533ed4ed06e42f9021208 | Unavailable | None listed |
| a23706426da9b611be5beae0f3faa260fb453b4e | affected | git | Unavailable | Unavailable | None listed |
| 5.13.19 | affected | semver | 5.14 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.14 | Unavailable | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.177 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.144 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.95 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.38 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.3 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |