CVE-2023-53481ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In 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].
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 43f9b25a9cdd7b177f77f026b1461abd1abbd174 before b40d2fbf47af58377e898b5062077a47bb28a132; from 43f9b25a9cdd7b177f77f026b1461abd1abbd174 before f006f596fe851c3b6aae60b79f89f89f0e515d2f; from 43f9b25a9cdd7b177f77f026b1461abd1abbd174 before b5be23f6ae610bdb262160a1f294afee6d0e6a69; 43f9b25a9cdd7b177f77f026b1461abd1abbd174 builds before 8a18856e074479bd050b01e688c58defadce7ab0; 43f9b25a9cdd7b177f77f026b1461abd1abbd174 builds before 3afaaf6f5867dc4ad383808d4053f428ec7b867d; from 43f9b25a9cdd7b177f77f026b1461abd1abbd174 before cc4bc532acda66189bddc03b3fe1ad689d9a48a2; 43f9b25a9cdd7b177f77f026b1461abd1abbd174 builds before 5af1c643184a5d09ff5b3f334077a4d0a163c677; 43f9b25a9cdd7b177f77f026b1461abd1abbd174 builds before 4d57a7333e26040f2b583983e1970d9d460e56b0 | CNA record |
linux linux_kernel linux:linux_kernel | from 2.6.25 before 4.14.308; from 4.15 before 4.19.276; from 4.20 before 5.4.235; from 5.5 before 5.10.173; from 5.11 before 5.15.100; from 5.16 before 6.1.18; from 6.2 before 6.2.5 | NVD |
References
- https://git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132patch
- https://git.kernel.org/stable/c/f006f596fe851c3b6aae60b79f89f89f0e515d2fpatch
- https://git.kernel.org/stable/c/b5be23f6ae610bdb262160a1f294afee6d0e6a69patch
- https://git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0patch
- https://git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867dpatch
- https://git.kernel.org/stable/c/cc4bc532acda66189bddc03b3fe1ad689d9a48a2patch
- https://git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677patch
- https://git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.