Linux Kernel up to 6.18.13/6.19.3 amdxdna iommu_sva_unbind_device denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.18.13/6.19.3. Affected by this issue is the function iommu_sva_unbind_device of the component amdxdna. Such manipulation leads to denial of service. This vulnerability is listed as CVE-2026-45931. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.18.13/6.19.3. Affected by this issue is the function iommu_sva_unbind_device of the component amdxdna. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Hold mm structure across iommu_sva_unbind_device() Some tests trigger a crash in iommu_sva_unbind_device() due to accessing iommu_mm after the associated mm structure has been freed. Fix this by taking an explicit reference to the mm structure after successfully binding the device, and releasing it only after the device is unbound. This ensures the mm remains valid for the entire SVA bind/unbind lifetime.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-45931 since 05/13/2026. Technical details are known, but there is no available exploit.

Upgrading to version 6.18.14 or 6.19.4 eliminates this vulnerability. Applying the patch f6b4c1d98a7b8040d4d02e89425b3942016a2c2c/f31ccf6278132a35a652fe5eeac3941e1e912398/a9162439ad792afcddc04718408ec1380b7a5f63 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (Linux): 🔒

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.14/6.19.4
Patch: f6b4c1d98a7b8040d4d02e89425b3942016a2c2c/f31ccf6278132a35a652fe5eeac3941e1e912398/a9162439ad792afcddc04718408ec1380b7a5f63

Timelineinfo

05/13/2026 CVE reserved
05/27/2026 +14 days Advisory disclosed
05/27/2026 +0 days VulDB entry created
06/25/2026 +29 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-45931 (🔒)
GCVE (CVE): GCVE-0-2026-45931
GCVE (VulDB): GCVE-100-366158

Entryinfo

Created: 05/27/2026 16:59
Updated: 06/25/2026 17:46
Changes: 05/27/2026 16:59 (59), 06/25/2026 17:46 (11)
Complete: 🔍
Cache ID: 216::103

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