{"cve":"CVE-2026-98245","nvd":{"published":"2026-10-06T09:18:12.643","modified":"2026-10-21T13:21:25.683","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: take commit root semaphore when iterating in mark_block_group_to_copy()\n\nmark_block_group_to_copy() iterates over the commit root with\nskip_locking=true. A concurrent transaction commit can swap and free\nthe commit root during iteration, causing use-after-free when\naccessing extent buffers.\n\nFix it by using path->need_commit_sem to protect the commit root search.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/0594e3423f4ba3137c734371169491f9a98e9af4","https://git.kernel.org/stable/c/709f6a5e986535005110c6c69b322f63631cb200","https://git.kernel.org/stable/c/8e2007b263ea250251ec3021a0a197da990ee1a8","https://git.kernel.org/stable/c/93a025166495c63ba5b8ac721c7040d5312e8335","https://git.kernel.org/stable/c/c32490c6d3f3a9f2d177d57c7eb8bbc347561d08"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-98245","score":0.00168,"percentile":0.06028,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}