{"apiVersion":"1.0","identifier":"CVE-2026-72132","description":"In the Linux kernel, the following vulnerability has been resolved: NFS: Charge unstable writes by request size, not folio size nfs_folio_mark_unstable() and nfs_folio_clear_commit() charge and uncharge NR_WRITEBACK/WB_WRITEBACK by folio_nr_pages(folio) once per *request* added to or removed from a commit list. This is correct only when a folio has a single associated request. When pg_test splits a folio into N sub-folio requests (e.g. pNFS flexfiles striping with a stripe unit smaller than the folio size, or plain wsize-limited splitting), each of the N requests independently charges the whole folio-s page count, inflating the accounting by a factor of N per folio. With large folios and small stripe units this reaches multiple orders of magnitude: a 2 MiB folio split into 512 4 KiB requests can charge up to 512x its real size, pushing global dirty+writeback accounting past the system-s dirty threshold and forcing every buffered writer on the host into the hard-throttle path, including unrelated in-kernel NFS server threads sharing the box. Charge each request only for the pages it actually covers.","publishedAt":"2026-08-15T06:21:30","lastModifiedAt":"2026-08-17T06:18:12","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72132","cvssScore":null,"cvssVector":"Pending","epssProbability":0.002,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72132","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72132","en":"https://www.redsauce.net/en/cves/CVE-2026-72132","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72132","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72132","de":"https://www.redsauce.net/de/cves/CVE-2026-72132","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72132","el":"https://www.redsauce.net/el/cves/CVE-2026-72132"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72132"}}