ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-53481
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-10-01 12:15:50 UTC
Updated2026-10-15 22:17:40 UTC
DescriptionIn 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].

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-835

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 b40d2fbf47af58377e898b5062077a47bb28a132 git Not specified
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 f006f596fe851c3b6aae60b79f89f89f0e515d2f git Not specified
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 b5be23f6ae610bdb262160a1f294afee6d0e6a69 git Not specified
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 8a18856e074479bd050b01e688c58defadce7ab0 git Not specified
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 3afaaf6f5867dc4ad383808d4053f428ec7b867d git Not specified
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 cc4bc532acda66189bddc03b3fe1ad689d9a48a2 git Not specified
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 5af1c643184a5d09ff5b3f334077a4d0a163c677 git Not specified
CNA Linux Linux affected 43f9b25a9cdd7b177f77f026b1461abd1abbd174 4d57a7333e26040f2b583983e1970d9d460e56b0 git Not specified
CNA Linux Linux affected 2.6.25 Not specified
CNA Linux Linux unaffected 2.6.25 semver Not specified
CNA Linux Linux unaffected 4.14.308 4.14.* semver Not specified
CNA Linux Linux unaffected 4.19.276 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.235 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.173 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.100 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.18 6.1.* semver Not specified
CNA Linux Linux unaffected 6.2.5 6.2.* semver Not specified
CNA Linux Linux unaffected 6.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f006f596fe851c3b6aae60b79f89f89f0e515d2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cc4bc532acda66189bddc03b3fe1ad689d9a48a2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b5be23f6ae610bdb262160a1f294afee6d0e6a69 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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