GHSA-3PV3-RMR2-25G2
Vulnerability from github – Published: 2025-10-01 12:30 – Updated: 2026-01-20 18:31In the Linux kernel, the following vulnerability has been resolved:
ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed
Following process will trigger an infinite loop in ubi_wl_put_peb():
ubifs_bgt ubi_bgt
ubifs_leb_unmap ubi_leb_unmap ubi_eba_unmap_leb ubi_wl_put_peb wear_leveling_worker e1 = rb_entry(rb_first(&ubi->used) e2 = get_peb_for_wl(ubi) ubi_io_read_vid_hdr // return err (flash fault) out_error: ubi->move_from = ubi->move_to = NULL wl_entry_destroy(ubi, e1) ubi->lookuptbl[e->pnum] = NULL retry: e = ubi->lookuptbl[pnum]; // return NULL if (e == ubi->move_from) { // NULL == NULL gets true goto retry; // infinite loop !!!
$ top PID USER PR NI VIRT RES SHR S %CPU %MEM COMMAND 7676 root 20 0 0 0 0 R 100.0 0.0 ubifs_bgt0_0
Fix it by: 1) Letting ubi_wl_put_peb() returns directly if wearl leveling entry has been removed from 'ubi->lookuptbl'. 2) Using 'ubi->wl_lock' protecting wl entry deletion to preventing an use-after-free problem for wl entry in ubi_wl_put_peb().
Fetch a reproducer in [Link].
{
"affected": [],
"aliases": [
"CVE-2023-53481"
],
"database_specific": {
"cwe_ids": [
"CWE-835"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-01T12:15:50Z",
"severity": "MODERATE"
},
"details": "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(\u0026ubi-\u003eused)\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-\u003emove_from = ubi-\u003emove_to = NULL\n\t\t\t wl_entry_destroy(ubi, e1)\n\t\t\t ubi-\u003elookuptbl[e-\u003epnum] = NULL\n retry:\n e = ubi-\u003elookuptbl[pnum];\t// return NULL\n\tif (e == ubi-\u003emove_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 \u0027ubi-\u003elookuptbl\u0027.\n 2) Using \u0027ubi-\u003ewl_lock\u0027 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].",
"id": "GHSA-3pv3-rmr2-25g2",
"modified": "2026-01-20T18:31:52Z",
"published": "2025-10-01T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53481"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b5be23f6ae610bdb262160a1f294afee6d0e6a69"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc4bc532acda66189bddc03b3fe1ad689d9a48a2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f006f596fe851c3b6aae60b79f89f89f0e515d2f"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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