{"cve":"CVE-2026-93198","nvd":{"published":"2026-09-17T17:18:16.097","modified":"2026-10-19T10:17:10.473","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: validate the persisted dirty_tail chain at load\n\nThe writeback worker follows the persisted dirty_tail chain, which is\ndecoded from the cache device independently of the key_tail chain that\ncache_replay() walks and bounds. A crafted image, whose on-media fields are\nauthenticated only by a crc32c with a fixed seed, can aim dirty_tail at a\nchain of last ksets that never terminates, so cache_writeback_fn() re-arms\nitself with no delay forever.\n\nWalk the dirty_tail chain once at load with the same hop cap cache_replay()\nuses and fail the table load with -EIO if it does not reach an end within\nn_segs hops.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/4822a030929e0e77aa380722dc42e3e4c9edd346","https://git.kernel.org/stable/c/58d620ee9e01d4bdbceaf2ae1450d307a2a9d58b","https://git.kernel.org/stable/c/8195cf3f4a82ef49d9b0651c507ed0784caf23fb"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-93198","score":0.00206,"percentile":0.1059,"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."]}