AZL-92567
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-92567.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-92567
- Upstream
- Published
- 2026-07-19T12:16:56Z
- Modified
- 2026-08-28T17:47:44Z
- Summary
- CVE-2026-63833 affecting package kernel for versions less than 6.6.144.1-2
- Details
-
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.
[almaz.alexandrovich@paragon-software.com: added an additional check for non privileged users]
- References