ntfs3: fix uninit memory after failed mi_read in mi_format_new
In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix uninit memory after failed mi_read in mi_format_new Fix a KMSAN un-init bug found by syzkaller. ntfs_get_bh() expects a buffer from sb_getblk(), that buffer may not be uptodate. We do not bring the buffer uptodate before setting it as uptodate. If the buffer were to not be uptodate, it could mean adding a buffer with un-init data to the mi record. Attempting to load that record will trigger KMSAN. Avoid this by setting the buffer as uptodate, if it’s not already, by overwriting it.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.15.198, 6.1.160, 6.12.63, 6.17.13, 6.18.2, 6.6.120
- CVEs
- CVE-2025-68728
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 19:00 UTC · Revision 1
Source evidence
ntfs3: fix uninit memory after failed mi_read in mi_format_new
core-osv · Original sourcePublished 24 Dec 2025, 10:33 UTC
In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix uninit memory after failed mi_read in mi_format_new Fix a KMSAN un-init bug found by syzkaller. ntfs_get_bh() expects a buffer from sb_getblk(), that buffer may not be uptodate. We do not bring the buffer uptodate before setting it as uptodate. If the buffer were to not be uptodate, it could mean adding a buffer with un-init data to the mi record. Attempting to load that record will trigger KMSAN. Avoid this by setting the buffer as uptodate, if it’s not already, by overwriting it.
osv:CVE-2025-68728
Kernel
Fixed versions: 5.15.198, 6.1.160, 6.6.120, 6.12.63, 6.17.13, 6.18.2
Complete source record
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"title": "ntfs3: fix uninit memory after failed mi_read in mi_format_new",
"summary": "In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix uninit memory after failed mi_read in mi_format_new Fix a KMSAN un-init bug found by syzkaller. ntfs_get_bh() expects a buffer from sb_getblk(), that buffer may not be uptodate. We do not bring the buffer uptodate before setting it as uptodate. If the buffer were to not be uptodate, it could mean adding a buffer with un-init data to the mi record. Attempting to load that record will trigger KMSAN. Avoid this by setting the buffer as uptodate, if it’s not already, by overwriting it.",
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"modified": "2026-10-28T02:30:22.703349221Z",
"provider": "osv",
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"security_relevant": true,
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"source_id": "core-osv",
"document_id": 488887,
"published_at": "2025-12-24T10:33:11.847+00:00"
}