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CVE-2026-46308— pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()

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pmdomain mediatek中scpsys_get_bus_protection_legacy函数释放后重用，可能导致释放后重用。

AI Predicted 4.9 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux c29345fa5f66bea0790cf2219f57b974d4fc177b< cb27e43c0511e9e1ca8818d231656070b11c18cf affected
c29345fa5f66bea0790cf2219f57b974d4fc177b< 38d8410021b55d226847b2ac8d189d89fe5a8866 affected
c29345fa5f66bea0790cf2219f57b974d4fc177b< ec1fcddb3117d9452210e838fd37389ee61e10e8 affected
6.18 affected
< 6.18 unaffected
6.18.30≤ 6.18.* unaffected
7.0.7≤ 7.0.* unaffected
7.1≤ * unaffected
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I. Basic Information for CVE-2026-46308

Vulnerability Information
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Vulnerability Title
pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy() In scpsys_get_bus_protection_legacy(), of_find_node_with_property() returns a device node with its reference count incremented. The function then calls of_node_put(node) before checking whether syscon_regmap_lookup_by_phandle() returns an error. If an error occurs, dev_err_probe() dereferences the node pointer to print diagnostic information, but the node memory may have already been freed due to the earlier of_node_put(), leading to a use-after-free vulnerability. Fix this by moving the of_node_put() call after the error check, ensuring the node is still valid when accessed in the error path.
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pmdomain mediatek中scpsys_get_bus_protection_legacy函数释放后重用，可能导致释放后重用。
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 c29345fa5f66bea0790cf2219f57b974d4fc177b ~ cb27e43c0511e9e1ca8818d231656070b11c18cf -
Linux Linux 6.18 -

II. Public POCs for CVE-2026-46308

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III. Intelligence Information for CVE-2026-46308

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Patches & Fixes for CVE-2026-46308 (3)

Same Patch Batch · Linux · 2026-06-08 · 41 CVEs total

CVE-2026-46289 9.8 CRITICAL lib/scatterlist: fix length calculations in extract_kvec_to_sg
CVE-2026-46288 8.4 HIGH of: unittest: fix use-after-free in of_unittest_changeset()
CVE-2026-46307 8.3 HIGH wifi: ath5k: do not access array OOB
CVE-2026-46303 8.2 HIGH isofs: validate Rock Ridge CE continuation extent against volume size
CVE-2026-46274 7.8 HIGH io-wq: check that the predecessor is hashed in io_wq_remove_pending()
CVE-2026-46311 7.8 HIGH drm/amdgpu/userq: fix access to stale wptr mapping
CVE-2026-46280 7.8 HIGH lib: test_hmm: evict device pages on file close to avoid use-after-free
CVE-2026-46277 7.8 HIGH mm/zone_device: do not touch device folio after calling ->folio_free()
CVE-2026-46275 7.8 HIGH Bluetooth: hci_uart: fix UAFs and race conditions in close and init paths
CVE-2026-46306 7.5 HIGH flow_dissector: do not dissect PPPoE PFC frames
CVE-2026-46304 7.5 HIGH nvmet: avoid recursive nvmet-wq flush in nvmet_ctrl_free
CVE-2026-46299 7.0 HIGH hfsplus: fix held lock freed on hfsplus_fill_super()
CVE-2026-46312 media: videobuf2: Set vma_flags in vb2_dma_sg_mmap
CVE-2026-46313 media: intel/ipu6: fix error pointer dereference
CVE-2026-46310 media: renesas: vsp1: Fix NULL pointer deref on module unload
CVE-2026-46309 drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise
CVE-2026-46305 staging: rtl8723bs: os_dep: avoid NULL pointer dereference in rtw_cbuf_alloc
CVE-2025-71315 drm/vkms: Convert to DRM's vblank timer
CVE-2026-46314 drm/v3d: Reject empty multisync extension to prevent infinite loop
CVE-2026-46302 selinux: allow multiple opens of /sys/fs/selinux/policy

Showing top 20 of 41 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46308

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