{"cve":"CVE-2026-31556","nvd":{"published":"2026-04-24T15:16:29.977","modified":"2026-06-17T10:33:58.327","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: scrub: unlock dquot before early return in quota scrub\n\nxchk_quota_item can return early after calling xchk_fblock_process_error.\nWhen that helper returns false, the function returned immediately without\ndropping dq->q_qlock, which can leave the dquot lock held and risk lock\nleaks or deadlocks in later quota operations.\n\nFix this by unlocking dq->q_qlock before the early return.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/268378b6ad20569af0d1957992de1c8b16c6e900","https://git.kernel.org/stable/c/3b0c3414b308e6822cda90bf99f7eac94d4cca2b","https://git.kernel.org/stable/c/d128fc0c5c2b19224927d4fd2a46c2fe6a1f606f","https://git.kernel.org/stable/c/e822f535273af0e8968eab7acc0cea0b90dd25af"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-31556","score":0.00122,"percentile":0.0195,"date":"2026-11-01"},"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."]}