Answer in brief
CVE-2026-97927 records a Unknown severity vulnerability in ufs: create the root dentry after loading cylinder metadata. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a9804121d55aaa4319c1cac00b99794aa177dd6a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <785e523b6c1931d802cab9f85912f3e6c7028af1 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8173e051a8acbb4ae6547be0436727944119e0b5 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55a4c98abb9694b067c6a031d11501f06b6b523c | a9804121d55aaa4319c1cac00b99794aa177dd6a, 785e523b6c1931d802cab9f85912f3e6c7028af1, 8173e051a8acbb4ae6547be0436727944119e0b5, 55a4c98abb9694b067c6a031d11501f06b6b523c |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 25, 2026
In the Linux kernel, the following vulnerability has been resolved: ufs: create the root dentry after loading cylinder metadata ufs_fill_super() installed sb->s_root before it loaded the cylinder group structures for a writable mount: sb->s_root = d_make_root(inode); ... if (!sb_rdonly(sb)) if (!ufs_read_cylinder_structures(sb)) goto failed; When ufs_read_cylinder_structures() failed, the error path freed the in-core superblock information and set sb->s_fs_info to NULL while sb->s_root stayed installed. get_tree_bdev() then reached deactivate_locked_super(), and because s_root was present, generic_shutdown_super() called sync_filesystem() and the put_super operation. Both dereference UFS_SB(sb), which is now NULL, so a mount that fails only while reading the cylinder groups oopses during teardown. A crafted image whose first cylinder group cannot be read reaches this path. Load the cylinder group metadata first and create the root dentry last, so the superblock is published to the VFS only once it is fully set up. ufs_setup_cstotal() and ufs_read_cylinder_structures() take only the super_block and do not use the root inode, so the reordering is safe.
Quoted source text, attributed separately from HOL analysis.