{"id":"CVE-2023-53481","revision":"d6c4f8bde7124d33b96222d6bd124010","records":[{"revision":"d6c4f8bde7124d33b96222d6bd124010","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53481","aliases":[],"title":"ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed","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].","state":0,"publishedAt":"2025-10-01T11:42:49.825+00:00","modifiedAt":"2026-10-15T21:41:28.594+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/mtd/ubi/wl.c\"\n ],\n \"versions\": [\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"b40d2fbf47af58377e898b5062077a47bb28a132\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"f006f596fe851c3b6aae60b79f89f89f0e515d2f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"b5be23f6ae610bdb262160a1f294afee6d0e6a69\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"8a18856e074479bd050b01e688c58defadce7ab0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"3afaaf6f5867dc4ad383808d4053f428ec7b867d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"cc4bc532acda66189bddc03b3fe1ad689d9a48a2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"5af1c643184a5d09ff5b3f334077a4d0a163c677\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43f9b25a9cdd7b177f77f026b1461abd1abbd174\",\n \"lessThan\": \"4d57a7333e26040f2b583983e1970d9d460e56b0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/mtd/ubi/wl.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.25\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.25\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.14.308\",\n \"lessThanOrEqual\": \"4.14.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.276\",\n \"lessThanOrEqual\": \"4.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.235\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.173\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.100\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.18\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.2.5\",\n \"lessThanOrEqual\": \"6.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132","https://git.kernel.org/stable/c/f006f596fe851c3b6aae60b79f89f89f0e515d2f","https://git.kernel.org/stable/c/b5be23f6ae610bdb262160a1f294afee6d0e6a69","https://git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0","https://git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867d","https://git.kernel.org/stable/c/cc4bc532acda66189bddc03b3fe1ad689d9a48a2","https://git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677","https://git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53481","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53481","identifiers":["CVE-2023-53481"]},"retained":false,"historicalAffected":[]}],"coverage":[]}