Linux Kernel up to 6.18.39/7.1.4/7.2-rc2 amdxdna amdxdna_gem_dmabuf_mmap use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k0.00

Summaryinfo

A vulnerability described as very critical has been identified in Linux Kernel up to 6.18.39/7.1.4/7.2-rc2. This vulnerability affects the function amdxdna_gem_dmabuf_mmap of the component amdxdna. Executing a manipulation can lead to use after free. The identification of this vulnerability is CVE-2026-72093. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.18.39/7.1.4/7.2-rc2 and classified as very critical. This vulnerability affects the function amdxdna_gem_dmabuf_mmap of the component amdxdna. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix use-after-free in amdxdna_gem_dmabuf_mmap() When vm_insert_pages() fails, the error path calls vma->vm_ops->close(vma) which internally calls drm_gem_vm_close() → drm_gem_object_put(), releasing the GEM object reference acquired at the start of the function. However, the close_vma label then falls through to put_obj, which calls drm_gem_object_put() a second time on the same object. If the first put releases the last reference, the object is freed and the second put accesses freed memory, causing a use-after-free. Fix by returning directly from close_vma instead of falling through to put_obj, since the close handler already performs all necessary cleanup including the object put.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-72093 since 08/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/15/2026).

Upgrading to version 6.18.40, 7.1.5 or 7.2-rc3 eliminates this vulnerability. Applying the patch 4e370b5289624f46a356dcc94f9f87025eaa6036/5da885c39baa70f570a8be35a78e85a351f33918/63bbf9ac5dde2ba85e7b39d0a0b7d540e6252ba4 is able to eliminate this problem.

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Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

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

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: No
Local: No
Remote: Yes

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 6.18.40/7.1.5/7.2-rc3
Patch: 4e370b5289624f46a356dcc94f9f87025eaa6036/5da885c39baa70f570a8be35a78e85a351f33918/63bbf9ac5dde2ba85e7b39d0a0b7d540e6252ba4

Timelineinfo

08/09/2026 CVE reserved
08/15/2026 +6 days Advisory disclosed
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-72093 (🔒)
GCVE (CVE): GCVE-0-2026-72093
GCVE (VulDB): GCVE-100-390514

Entryinfo

Created: 08/15/2026 12:10
Changes: 08/15/2026 12:10 (59)
Complete: 🔍
Cache ID: 216::103

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