7.8

CVE-2026-90118

ntfs: fix off-by-one page overflow in ntfs_decompress()

In the Linux kernel, the following vulnerability has been resolved:

ntfs: fix off-by-one page overflow in ntfs_decompress()

The per-token range check in ntfs_decompress() uses

	if (cb >= cb_sb_end || dp_addr > dp_sb_end)
		break;

so dp_addr == dp_sb_end falls through to the symbol copy
`*dp_addr++ = *cb++`, writing one byte past the destination page.  Since
NTFS_SB_SIZE == PAGE_SIZE the destination is a single page, so the byte
lands in the adjacent page, and *dest_ofs is left one past the sub-block
end (the later `*dest_ofs &= ~PAGE_MASK` then yields 1, not 0, so the page
is never finalized and later sub-blocks keep writing further past it).  A
corrupted compressed $DATA attribute thus produces a bounded run of
out-of-bounds writes when the file is read.

Break as soon as dp_addr reaches dp_sb_end; a full sub-block still
completes, as its final copy advances dp_addr to exactly dp_sb_end.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669
Version < b42644e425fed4a5cd6c88372655da5c1b52c666
Status affected
Version 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669
Version < 98716c9fce21f6c8a9d71e08cf53e7504fa562f4
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 7.1
Status affected
Version 0
Version < 7.1
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.058
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/b42644e425fed4a5cd6c88372655da5c1b52c666
https://git.kernel.org/stable/c/98716c9fce21f6c8a9d71e08cf53e7504fa562f4