Answer in brief
CVE-2026-63833 records a High severity (CVSS 7.1) vulnerability in ntfs3: reject direct userspace writes to reserved $LX* xattrs. 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.
CVSS is 7.1. 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 | >=be71b5cba2e6485e8959da7a9f9a44461a1bb074 <e574af95234afc3c725988bbc1fdeb46b9f386a4 || >=be71b5cba2e6485e8959da7a9f9a44461a1bb074 <2c3cd6da4a14380ef79e34bd9dff7caf46687477 || >=be71b5cba2e6485e8959da7a9f9a44461a1bb074 <e8852ae29868e449fdb47eebc28f35fb80741a5f || >=be71b5cba2e6485e8959da7a9f9a44461a1bb074 <f8d420949b335a4b51d06ab276beee6b8dfdc909 || >=be71b5cba2e6485e8959da7a9f9a44461a1bb074 <5e658b9245a52d838ef93729a7bc07de8e19deb7 || >=be71b5cba2e6485e8959da7a9f9a44461a1bb074 <293a84fa40b3a1b3471c0545722724bc10973f76 || >=be71b5cba2e6485e8959da7a9f9a44461a1bb074 <5b08dccecf825cbf905f348bc6ccb497507e28e2 | e574af95234afc3c725988bbc1fdeb46b9f386a4, 2c3cd6da4a14380ef79e34bd9dff7caf46687477, e8852ae29868e449fdb47eebc28f35fb80741a5f, f8d420949b335a4b51d06ab276beee6b8dfdc909, 5e658b9245a52d838ef93729a7bc07de8e19deb7, 293a84fa40b3a1b3471c0545722724bc10973f76, 5b08dccecf825cbf905f348bc6ccb497507e28e2 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ntfs3: reject direct userspace writes to reserved $LX* xattrs NTFS3 uses $LXUID, $LXGID, $LXMOD and $LXDEV as internal WSL permission metadata and reloads them into i_uid, i_gid and i_mode from ntfs_get_wsl_perm(). Because the empty-prefix xattr handler also lets file owners call setxattr() on these names directly, an unprivileged writer on a writable ntfs3 mount can plant root ownership and S_ISUID on their own file and gain euid 0 after inode reload. Reject direct userspace writes to the reserved $LX* names. Internal ntfs3 metadata updates are unchanged because ntfs_save_wsl_perm() writes them via ntfs_set_ea() directly. [[email protected]: added an additional check for non privileged users]
Quoted source text, attributed separately from HOL analysis.