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CVE-2025-21842— amdkfd: properly free gang_ctx_bo when failed to init user queue

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amdkfd模块在初始化用户队列失败时未正确释放gang_ctx_bo。

CVSS 7.8 · High EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1207 · Rogue Domain Controller

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux fb91065851cd5f2735348c5f3eddeeca3d7c2973< ae5ab1c1ae504f622cc1ff48830a9ed48428146d affected
fb91065851cd5f2735348c5f3eddeeca3d7c2973< 091a68c58c1bbd2ab7d05d1b32c1306394ec691d affected
fb91065851cd5f2735348c5f3eddeeca3d7c2973< a33f7f9660705fb2ecf3467b2c48965564f392ce affected
6.12 affected
< 6.12 unaffected
6.12.16≤ 6.12.* unaffected
6.13.4≤ 6.13.* unaffected
6.14≤ * unaffected
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I. Basic Information for CVE-2025-21842

Vulnerability Information
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Vulnerability Title
amdkfd: properly free gang_ctx_bo when failed to init user queue
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: amdkfd: properly free gang_ctx_bo when failed to init user queue The destructor of a gtt bo is declared as void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void **mem_obj); Which takes void** as the second parameter. GCC allows passing void* to the function because void* can be implicitly casted to any other types, so it can pass compiling. However, passing this void* parameter into the function's execution process(which expects void** and dereferencing void**) will result in errors.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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amdkfd模块在初始化用户队列失败时未正确释放gang_ctx_bo。
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 fb91065851cd5f2735348c5f3eddeeca3d7c2973 ~ ae5ab1c1ae504f622cc1ff48830a9ed48428146d -
Linux Linux 6.12 -

II. Public POCs for CVE-2025-21842

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III. Intelligence Information for CVE-2025-21842

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Patches & Fixes for CVE-2025-21842 (3)

Same Patch Batch · Linux · 2025-03-07 · 8 CVEs total

CVE-2025-21836 7.8 HIGH io_uring/kbuf: reallocate buf lists on upgrade
CVE-2025-21839 7.3 HIGH KVM: x86: Load DR6 with guest value only before entering .vcpu_run() loop
CVE-2025-21835 usb: gadget: f_midi: fix MIDI Streaming descriptor lengths
CVE-2025-21838 usb: gadget: core: flush gadget workqueue after device removal
CVE-2025-21840 thermal/netlink: Prevent userspace segmentation fault by adjusting UAPI header
CVE-2025-21841 cpufreq/amd-pstate: Fix cpufreq_policy ref counting
CVE-2025-21843 drm/panthor: avoid garbage value in panthor_ioctl_dev_query()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21842

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