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CVE-2025-22009— regulator: dummy: force synchronous probing

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未同步探测dummy regulator驱动，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.19% · P9

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 259b93b21a9ffe5117af4dfb5505437e463c6a5a< e26f24ca4fb940b15e092796c5993142a2558bd9 affected
259b93b21a9ffe5117af4dfb5505437e463c6a5a< d3b83a1442a09b145006eb4294b1a963c5345c9c affected
259b93b21a9ffe5117af4dfb5505437e463c6a5a< 5ade367b56c3947c990598df92395ce737bee872 affected
259b93b21a9ffe5117af4dfb5505437e463c6a5a< 8619909b38eeebd3e60910158d7d68441fc954e9 affected
6.4 affected
< 6.4 unaffected
6.6.85≤ 6.6.* unaffected
6.12.21≤ 6.12.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-22009

Vulnerability Information
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Vulnerability Title
regulator: dummy: force synchronous probing
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: regulator: dummy: force synchronous probing Sometimes I get a NULL pointer dereference at boot time in kobject_get() with the following call stack: anatop_regulator_probe() devm_regulator_register() regulator_register() regulator_resolve_supply() kobject_get() By placing some extra BUG_ON() statements I could verify that this is raised because probing of the 'dummy' regulator driver is not completed ('dummy_regulator_rdev' is still NULL). In the JTAG debugger I can see that dummy_regulator_probe() and anatop_regulator_probe() can be run by different kernel threads (kworker/u4:*). I haven't further investigated whether this can be changed or if there are other possibilities to force synchronization between these two probe routines. On the other hand I don't expect much boot time penalty by probing the 'dummy' regulator synchronously.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未同步探测dummy regulator驱动，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 259b93b21a9ffe5117af4dfb5505437e463c6a5a ~ e26f24ca4fb940b15e092796c5993142a2558bd9 -
Linux Linux 6.4 -

II. Public POCs for CVE-2025-22009

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III. Intelligence Information for CVE-2025-22009

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Patches & Fixes for CVE-2025-22009 (3)

Same Patch Batch · Linux · 2025-04-08 · 10 CVEs total

CVE-2025-22012 8.8 HIGH Revert "arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on apps_smmu"
CVE-2025-22015 7.8 HIGH mm/migrate: fix shmem xarray update during migration
CVE-2025-22013 7.3 HIGH KVM: arm64: Unconditionally save+flush host FPSIMD/SVE/SME state
CVE-2025-22017 devlink: fix xa_alloc_cyclic() error handling
CVE-2025-22016 dpll: fix xa_alloc_cyclic() error handling
CVE-2025-22014 soc: qcom: pdr: Fix the potential deadlock
CVE-2025-22011 ARM: dts: bcm2711: Fix xHCI power-domain
CVE-2025-22010 RDMA/hns: Fix soft lockup during bt pages loop
CVE-2025-22008 regulator: check that dummy regulator has been probed before using it

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-22009

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