{"id":"CVE-2026-97548","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions\n\nThe _maxlevels_ondisk functions are used to compute the size of\nin-memory btree cursors for each btree t…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions\n\nThe _maxlevels_ondisk functions are used to compute the size of\nin-memory btree cursors for each btree t…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 < 108114437915e61e8f88d1cbcc442c3f886a347e","Linux >= 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 < 84316cb25af95a60e655ccc8fe646bb5ad631b71","Linux >= 9abe03a0e4f978615a2b1b484b8d09ca84c16ea0 < aa301322f72f82f26e4ba0826018d41388ab9896","Linux 6.14"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T15:17:58.553","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97548","references":[{"url":"https://git.kernel.org/stable/c/108114437915e61e8f88d1cbcc442c3f886a347e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/84316cb25af95a60e655ccc8fe646bb5ad631b71","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aa301322f72f82f26e4ba0826018d41388ab9896","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.919Z","slug":"CVE-2026-97548","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions\n\nThe _maxlevels_ondisk functions are used to compute the size of\nin-memory btree cursors for each btree type.  Unfortunately, LOLLM\nnoticed that the rtrmap and rtrefcount versions of these functions\nforget to account for the inode root, which means that we could access\nbeyond the end of the cursor given a sufficiently large btree.  Fix\nthis.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":211006,"id":"CVE-2026-97548","ts":1790349123226,"field":"cvss","old":null,"new":"7.8"},{"seq":211005,"id":"CVE-2026-97548","ts":1790349123226,"field":"severity","old":"none","new":"high"}]}