{"cve":"CVE-2026-90420","nvd":{"published":"2026-09-17T17:17:46.440","modified":"2026-10-19T09:19:36.350","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix infinite loop in nilfs_clean_segments()\n\nsyzbot reported a hung task in nilfs_transaction_begin(). This occurs\nbecause the cleaner ioctl falls into an infinite loop if\nnilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device\nis remounted as read-only after an I/O error).\n\nCurrently in nilfs_clean_segments(), if err is non-zero, it logs the\nerror and sleeps but doesn't abort when it encounters a terminal error\nlike -EROFS. This causes the thread to loop forever.\n\nFix this by breaking out of the loop if nilfs_segctor_construct()\nreturns -EROFS. This matches the behaviour in\nnilfs_segctor_write_out(), which also handles -EROFS.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/1fc6df85b4954b6fda9c351843aaca3c06f66d8d","https://git.kernel.org/stable/c/217b967ad7887a3e1ebc08f46f6484e081acd4b4","https://git.kernel.org/stable/c/3bcdbdaac884a4baa59716cf9bd9470c75276e2d","https://git.kernel.org/stable/c/8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8","https://git.kernel.org/stable/c/c07e5ad6539e7e9350d5c65cbf8adb69d1711b15"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-90420","score":0.0022,"percentile":0.12347,"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."]}