CVE-2026-90118

CVE CVE-2026-90118EUVD EUVD-2026-81711Published 2026-09-17T16:06:23.000ZLast changed 2026-09-18T17:53:07.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux 7.1; patch: 7.3-rc1; patch: 0; 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <b42644e425fed4a5cd6c88372655da5c1b52c666; patch: 7.2.6; 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <98716c9fce21f6c8a9d71e08cf53e7504fa562f4

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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