Linux Kernel up to 6.18.45/7.1.9 pmdomain scpsys_get_bus_protection_legacy use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.0$5k-$25k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.45/7.1.9. It has been declared as very critical. Impacted is the function scpsys_get_bus_protection_legacy of the component pmdomain. Such manipulation leads to use after free. This vulnerability is listed as CVE-2026-80750. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.45/7.1.9. It has been rated as very critical. Affected by this issue is the function scpsys_get_bus_protection_legacy of the component pmdomain. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: pmdomain: mediatek: fix remaining %pOF after of_node_put() scpsys_get_bus_protection_legacy() looks up several legacy bus protection regmaps from device-tree nodes. Two error paths put the device node before checking whether the regmap lookup failed, but still pass that node to dev_err_probe() with %pOF on failure. If of_node_put() drops the last reference, the later %pOF formatting can dereference a freed device node. Keep the node reference until after the error message has been emitted in the infracfg and SMI lookup paths. Also drop the SMI node before returning when the SMI phandle is missing.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-80750 since 08/26/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/07/2026).

The vulnerability scanner Nessus provides a plugin with the ID 343066 (Linux Distros Unpatched Vulnerability : CVE-2026-80750), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.46 or 7.1.10 eliminates this vulnerability. Applying the patch 970b9c83a07c405fdd32bcce7cc4c9e670e58875/10bf2d7261d7f724ed43a09eea4c90c19c0230a0/3e013bc8b941bd52c8e3a99798d0ae8792cb71ca is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (343066). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.2
VulDB Meta Temp Score: 9.0

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.4
CNA Vector (Linux): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 343066
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-80750

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.46/7.1.10
Patch: 970b9c83a07c405fdd32bcce7cc4c9e670e58875/10bf2d7261d7f724ed43a09eea4c90c19c0230a0/3e013bc8b941bd52c8e3a99798d0ae8792cb71ca

Timelineinfo

08/26/2026 CVE reserved
09/03/2026 +8 days Advisory disclosed
09/03/2026 +0 days VulDB entry created
09/07/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80750 (🔒)
GCVE (CVE): GCVE-0-2026-80750
GCVE (VulDB): GCVE-100-398348

Entryinfo

Created: 09/03/2026 10:58
Updated: 09/07/2026 06:34
Changes: 09/03/2026 10:58 (59), 09/06/2026 13:26 (2), 09/07/2026 06:34 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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