LiveActive security incident?Get immediate response
CVE Record

CVE-2025-21668: pmdomain: imx8mp-blk-ctrl: add missing loop break condition

In the Linux kernel, the following vulnerability has been resolved: pmdomain: imx8mp-blk-ctrl: add missing loop break condition Currently imx8mp_blk_ctrl_remove() will continue the for loop until an out-of-bounds exception occurs. pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : dev_pm_domain_detach+0x8/0x48 lr : imx8mp_blk_ctrl_shutdown+0x58/0x90 sp : ffffffc084f8bbf0 x29: ffffffc084f8bbf0 x28: ffffff80daf32ac0 x27: 0000000000000000 x26: ffffffc081658d78 x25: 0000000000000001 x24: ffffffc08201b028 x23: ffffff80d0db9490 x22: ffffffc082340a78 x21: 00000000000005b0 x20: ffffff80d19bc180 x19: 000000000000000a x18: ffffffffffffffff x17: ffffffc080a39e08 x16: ffffffc080a39c98 x15: 4f435f464f006c72 x14: 0000000000000004 x13: ffffff80d0172110 x12: 0000000000000000 x11: ffffff80d0537740 x10: ffffff80d05376c0 x9 : ffffffc0808ed2d8 x8 : ffffffc084f8bab0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffffff80d19b9420 x4 : fffffffe03466e60 x3 : 0000000080800077 x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: dev_pm_domain_detach+0x8/0x48 platform_shutdown+0x2c/0x48 device_shutdown+0x158/0x268 kernel_restart_prepare+0x40/0x58 kernel_kexec+0x58/0xe8 __do_sys_reboot+0x198/0x258 __arm64_sys_reboot+0x2c/0x40 invoke_syscall+0x5c/0x138 el0_svc_common.constprop.0+0x48/0xf0 do_el0_svc+0x24/0x38 el0_svc+0x38/0xc8 el0t_64_sync_handler+0x120/0x130 el0t_64_sync+0x190/0x198 Code: 8128c2d0 ffffffc0 aa1e03e9 d503201f

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel reliability bug in the i.MX8MP power-domain block-control driver. During shutdown or reboot paths, a missing loop break can continue past valid entries and trigger an out-of-bounds exception. Business impact is most likely service disruption on affected embedded or ARM systems, not data theft based on the provided sources.

Executive priority

Treat as a targeted availability risk for affected embedded Linux estates. Prioritize systems where failed reboot or kexec could delay recovery, disrupt field devices, or affect maintenance windows. Broad enterprise urgency is lower unless i.MX8MP hardware is in use.

Technical view

CVE-2025-21668 affects Linux kernel code in imx8mp_blk_ctrl_remove(). The function can continue looping until an out-of-bounds exception occurs, with the supplied trace reaching dev_pm_domain_detach during platform shutdown, reboot, or kexec flow. Stable kernel commits are referenced as the fix sources.

Likely exposure

Exposure appears limited to Linux systems using the NXP i.MX8MP block-control power-domain driver, commonly embedded or ARM-based deployments. The source bundle lists Linux kernel versions as affected but provides no CVSS, CWE, or distribution-wide exploitability detail.

Exploitation context

The provided sources do not support active exploitation, and the CVE is not marked as KEV. The observable failure path is a kernel exception during shutdown, reboot, or kexec handling. Evidence is insufficient to claim remote exploitation or privilege escalation.

Researcher notes

The record lacks CVSS, CWE, and exploitability analysis. The supplied trace indicates an out-of-bounds exception from missing loop termination in the imx8mp block-control removal path. Avoid extrapolating beyond availability impact unless vendor analysis adds memory-safety consequences.

Mitigation direction

  • Update to a vendor kernel containing the referenced stable fixes.
  • Review Debian LTS guidance if running Debian-based affected kernels.
  • Prioritize embedded or edge systems built on i.MX8MP hardware.
  • Track vendor kernel advisories for exact package versions.
  • Schedule reboot testing after applying kernel updates.

Validation and detection

  • Inventory Linux kernels on i.MX8MP-based devices.
  • Check whether the kernel includes one referenced stable commit.
  • Review shutdown, reboot, and kexec logs for matching exceptions.
  • Confirm distribution package advisories before closing remediation.
  • Retest controlled reboot paths after updating.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2025-21668 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
6Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux556f5cf9568af772d494cff24ffaa7ea41e1ab40, 556f5cf9568af772d494cff24ffaa7ea41e1ab40, 556f5cf9568af772d494cff24ffaa7ea41e1ab40, 556f5cf9568af772d494cff24ffaa7ea41e1ab40unaffected
LinuxLinux5.19, 0, 6.1.127, 6.6.74, 6.12.11, 6.13affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.