{"id":"CVE-2026-98907","title":"btrfs: protect sb_write_pointer() with invalidate lock","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: protect sb_write_pointer() with invalidate lock\n\nsb_write_pointer() reads the super block from the block device page cache\nusing read_cache_page_gfp(). This has …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3c20917120ce61f2a123ca0810293872f4c6b5a4 < 80cd97c5e90096d040a623851795eac92fbd0ff1","Linux >= 3c20917120ce61f2a123ca0810293872f4c6b5a4 < 123b9a545f4d0348e81f558a032bf2a93ee5722f","Linux 6.15"],"published":"2026-10-23","updated":"2026-10-26","sourceUpdated":"2026-10-26T06:56:36.536Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98907","references":[{"url":"https://git.kernel.org/stable/c/80cd97c5e90096d040a623851795eac92fbd0ff1"},{"url":"https://git.kernel.org/stable/c/123b9a545f4d0348e81f558a032bf2a93ee5722f"},{"url":"https://git.kernel.org/stable/c/c9b38f2eab5a9bd74087390318d93ccdd8d2deff"},{"url":"https://git.kernel.org/stable/c/a0dc28359a8a26f970ccd250b126a2e0bd4118a5"},{"url":"https://git.kernel.org/stable/c/1a6c92aa7242a04e4349c0ea213dbf703a1c9891"},{"url":"https://git.kernel.org/stable/c/a58cab4535f085adc0f93d7efd7952ef437371da"}],"tags":["cve.org"],"epss":0.00161,"epssPercentile":0.05258,"ingestedAt":"2026-10-23T13:24:55.574Z","slug":"CVE-2026-98907","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: protect sb_write_pointer() with invalidate lock\n\nsb_write_pointer() reads the super block from the block device page cache\nusing read_cache_page_gfp(). This has the same race with BLKBSZSET as the\none fixed by commit 3f29d661e568 (\"btrfs: sync read disk super and set\nblock size\").\n\nTake the mapping invalidate lock around read_cache_page_gfp() to\nserialize the read against block size changes.\n\n## Affected\n\n- `Linux >= 3c20917120ce61f2a123ca0810293872f4c6b5a4 < 80cd97c5e90096d040a623851795eac92fbd0ff1`\n- `Linux >= 3c20917120ce61f2a123ca0810293872f4c6b5a4 < 123b9a545f4d0348e81f558a032bf2a93ee5722f`\n- `Linux 6.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}