CVE-2023-53481 Details
Description
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].
A vulnerability in the Linux kernel's UBI (Unsorted Block Image) subsystem can lead to an infinite loop during the wear-leveling process. This issue occurs in the 'ubi_wl_put_peb' function when the wear-leveling work fails, causing the function to repeatedly check for a physical erase block entry that has already been removed, effectively creating a loop. The problem is exacerbated by a lack of proper synchronization, which can lead to a use-after-free condition.
The vulnerability has been addressed in upstream Linux kernel commits. Users can upgrade to the latest version of the stable Linux kernel to apply the fix.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867d | kernel.org | Patch |
| https://git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132 | kernel.org | Patch |
| https://git.kernel.org/stable/c/b5be23f6ae610bdb262160a1f294afee6d0e6a69 | kernel.org | Patch |
| https://git.kernel.org/stable/c/cc4bc532acda66189bddc03b3fe1ad689d9a48a2 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f006f596fe851c3b6aae60b79f89f89f0e515d2f | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.25, < 4.14.308 >= 4.15, < 4.19.276 >= 4.20, < 5.4.235 >= 5.5, < 5.10.173 >= 5.11, < 5.15.100 >= 5.16, < 6.1.18 >= 6.2, < 6.2.5 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 4, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jan 20, 2026 | Initial Analysis | [email protected] |
| Oct 1, 2025 | New CVE Received | kernel.org |