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CVE-2025-38668— regulator: core: fix NULL dereference on unbind due to stale coupling data

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，该漏洞源于未重置耦合数据，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1529 · System Shutdown/Reboot

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux d8ca7d184b33af7913c244900df77c6cad6a5590< 7574892e259bbb16262ebfb4b65a2054a5e03a49 affected
d8ca7d184b33af7913c244900df77c6cad6a5590< 6c49eac796681e250e34156bafb643930310bd4a affected
d8ca7d184b33af7913c244900df77c6cad6a5590< ca9bef9ba1a6be640c87bf802d2e9e696021576a affected
d8ca7d184b33af7913c244900df77c6cad6a5590< 800a2cfb2df7f96b3fb48910fc595e0215f6b019 affected
d8ca7d184b33af7913c244900df77c6cad6a5590< 233d3c54c9620e95193923859ea1d0b0f5d748ca affected
d8ca7d184b33af7913c244900df77c6cad6a5590< 5d4261dbb3335221fd9c6e69f909ba79ee6663a7 affected
d8ca7d184b33af7913c244900df77c6cad6a5590< d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8 affected
d8ca7d184b33af7913c244900df77c6cad6a5590< ca46946a482238b0cdea459fb82fc837fb36260e affected
… +10 more rows
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I. Basic Information for CVE-2025-38668

Vulnerability Information
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Vulnerability Title
regulator: core: fix NULL dereference on unbind due to stale coupling data
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: regulator: core: fix NULL dereference on unbind due to stale coupling data Failing to reset coupling_desc.n_coupled after freeing coupled_rdevs can lead to NULL pointer dereference when regulators are accessed post-unbind. This can happen during runtime PM or other regulator operations that rely on coupling metadata. For example, on ridesx4, unbinding the 'reg-dummy' platform device triggers a panic in regulator_lock_recursive() due to stale coupling state. Ensure n_coupled is set to 0 to prevent access to invalid pointers.
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，该漏洞源于未重置耦合数据，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 d8ca7d184b33af7913c244900df77c6cad6a5590 ~ 7574892e259bbb16262ebfb4b65a2054a5e03a49 -
Linux Linux 5.3 -

II. Public POCs for CVE-2025-38668

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III. Intelligence Information for CVE-2025-38668

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Same Patch Batch · Linux · 2025-08-22 · 60 CVEs total

CVE-2025-38660 9.8 CRITICAL [ceph] parse_longname(): strrchr() expects NUL-terminated string
CVE-2025-38658 8.8 HIGH nvmet: pci-epf: Do not complete commands twice if nvmet_req_init() fails
CVE-2025-38643 8.8 HIGH wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
CVE-2024-58239 8.2 HIGH tls: stop recv() if initial process_rx_list gave us non-DATA
CVE-2025-38675 7.8 HIGH xfrm: state: initialize state_ptrs earlier in xfrm_state_find
CVE-2025-38627 7.8 HIGH f2fs: compress: fix UAF of f2fs_inode_info in f2fs_free_dic
CVE-2025-38653 7.8 HIGH proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al
CVE-2025-38659 7.8 HIGH gfs2: No more self recovery
CVE-2025-38640 7.8 HIGH bpf: Disable migration in nf_hook_run_bpf().
CVE-2025-38656 7.8 HIGH wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()
CVE-2025-38617 7.8 HIGH net/packet: fix a race in packet_set_ring() and packet_notifier()
CVE-2025-38670 7.8 HIGH arm64/entry: Mask DAIF in cpu_switch_to(), call_on_irq_stack()
CVE-2025-38618 7.8 HIGH vsock: Do not allow binding to VMADDR_PORT_ANY
CVE-2025-38616 7.8 HIGH tls: handle data disappearing from under the TLS ULP
CVE-2025-38619 7.8 HIGH media: ti: j721e-csi2rx: fix list_del corruption
CVE-2025-38667 7.8 HIGH iio: fix potential out-of-bound write
CVE-2025-38652 7.3 HIGH f2fs: fix to avoid out-of-boundary access in devs.path
CVE-2025-38657 7.3 HIGH wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()
CVE-2025-38639 7.1 HIGH netfilter: xt_nfacct: don't assume acct name is null-terminated
CVE-2025-38662 7.1 HIGH ASoC: mediatek: mt8365-dai-i2s: pass correct size to mt8365_dai_set_priv

Showing top 20 of 60 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38668

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