{"cve":"CVE-2023-53481","nvd":{"published":"2025-10-01T12:15:50.743","modified":"2026-10-15T22:17:40.303","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed\n\nFollowing process will trigger an infinite loop in ubi_wl_put_peb():\n\n\tubifs_bgt\t\tubi_bgt\nubifs_leb_unmap\n  ubi_leb_unmap\n    ubi_eba_unmap_leb\n      ubi_wl_put_peb\twear_leveling_worker\n                          e1 = rb_entry(rb_first(&ubi->used)\n\t\t\t  e2 = get_peb_for_wl(ubi)\n\t\t\t  ubi_io_read_vid_hdr  // return err (flash fault)\n\t\t\t  out_error:\n\t\t\t    ubi->move_from = ubi->move_to = NULL\n\t\t\t    wl_entry_destroy(ubi, e1)\n\t\t\t      ubi->lookuptbl[e->pnum] = NULL\n      retry:\n        e = ubi->lookuptbl[pnum];\t// return NULL\n\tif (e == ubi->move_from) {\t// NULL == NULL gets true\n\t  goto retry;\t\t\t// infinite loop !!!\n\n$ top\n  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     COMMAND\n  7676 root     20   0       0      0      0 R 100.0  0.0  ubifs_bgt0_0\n\nFix it by:\n 1) Letting ubi_wl_put_peb() returns directly if wearl leveling entry has\n    been removed from 'ubi->lookuptbl'.\n 2) Using 'ubi->wl_lock' protecting wl entry deletion to preventing an\n    use-after-free problem for wl entry in ubi_wl_put_peb().\n\nFetch a reproducer in [Link].","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":["CWE-835"],"references":["https://git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867d","https://git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0","https://git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677","https://git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0","https://git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:11:26.888974865+00:00"},"epss":{"cve":"CVE-2023-53481","score":0.00164,"percentile":0.05517,"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."]}