{"cve":"CVE-2025-68771","nvd":{"published":"2026-01-13T16:15:56.590","modified":"2026-06-17T09:59:33.620","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix kernel BUG in ocfs2_find_victim_chain\n\nsyzbot reported a kernel BUG in ocfs2_find_victim_chain() because the\n`cl_next_free_rec` field of the allocation chain list (next free slot in\nthe chain list) is 0, triggring the BUG_ON(!cl->cl_next_free_rec)\ncondition in ocfs2_find_victim_chain() and panicking the kernel.\n\nTo fix this, an if condition is introduced in ocfs2_claim_suballoc_bits(),\njust before calling ocfs2_find_victim_chain(), the code block in it being\nexecuted when either of the following conditions is true:\n\n1. `cl_next_free_rec` is equal to 0, indicating that there are no free\nchains in the allocation chain list\n2. `cl_next_free_rec` is greater than `cl_count` (the total number of\nchains in the allocation chain list)\n\nEither of them being true is indicative of the fact that there are no\nchains left for usage.\n\nThis is addressed using ocfs2_error(), which prints\nthe error log for debugging purposes, rather than panicking the kernel.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/039bef30e320827bac8990c9f29d2a68cd8adb5f","https://git.kernel.org/stable/c/1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7","https://git.kernel.org/stable/c/7acc0390e0dd7474c4451d05465a677d55ad4268","https://git.kernel.org/stable/c/96f1b074c98c20f55a3b23d2ab44d9fb0f619869","https://git.kernel.org/stable/c/b08a33d5f80efe6979a6e8f905c1a898910c21dd"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:19:41.481987139+00:00"},"epss":{"cve":"CVE-2025-68771","score":0.00207,"percentile":0.10875,"date":"2026-10-31"},"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."]}