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CVE-2026-68447— drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to BO size

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基金会开源的一个操作系统内核。 Linux kernel 7.1.6之前版本存在安全漏洞，该漏洞源于CRIU检查点复制MQD控制栈时未将硬件大小限制在分配的BO区域内，导致memcpy越界读取相邻GTT内存，可能将内核数据泄露给用户空间。

CVSS 7.1 · High EPSS 0.11% · P1

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 3a9822d7bd623be9000cef8101ecf8479fa53f2c< a0d87beb2660a5098b2b0ecdc1e96810a9074ea9 affected
3a9822d7bd623be9000cef8101ecf8479fa53f2c< 426ffae6ecc7ec77d32bf8be065c21a1b881b084 affected
5.18 affected
< 5.18 unaffected
7.1.6≤ 7.1.* unaffected
7.2≤ * unaffected
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I. Basic Information for CVE-2026-68447

Vulnerability Information
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Vulnerability Title
drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to BO size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to BO size CRIU checkpoint copies the MQD control stack using cp_hqd_cntl_stack_size from hardware without bounding it to the allocated BO region. If the HW field is larger than the queue's control stack allocation, memcpy reads past the BO into adjacent GTT memory and can leak kernel data to userspace. Store the page-aligned control stack BO size in mqd_manager and clamp checkpoint copies and reported checkpoint sizes to min(cp_hqd_cntl_stack_size, mm->ctl_stack_size). Apply the same bound for multi-XCC v9.4.3 checkpoint layout. (cherry picked from commit 6c2abd0ec09e86c6323010673766f76050e28aa3)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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基金会开源的一个操作系统内核。 Linux kernel 7.1.6之前版本存在安全漏洞，该漏洞源于CRIU检查点复制MQD控制栈时未将硬件大小限制在分配的BO区域内，导致memcpy越界读取相邻GTT内存，可能将内核数据泄露给用户空间。
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 3a9822d7bd623be9000cef8101ecf8479fa53f2c ~ a0d87beb2660a5098b2b0ecdc1e96810a9074ea9 -
Linux Linux 5.18 -

II. Public POCs for CVE-2026-68447

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III. Intelligence Information for CVE-2026-68447

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Patches & Fixes for CVE-2026-68447 (2)

Same Patch Batch · Linux · 2026-08-12 · 22 CVEs total

CVE-2026-68431 9.1 CRITICAL ksmbd: validate minimum PDU size for transform requests
CVE-2026-68432 8.8 HIGH vxlan: require CAP_NET_ADMIN in the device netns for changelink
CVE-2026-68433 8.6 HIGH libceph: bound get_version reply decode to front len
CVE-2026-68446 7.8 HIGH drm/vmwgfx: Validate vmw_surface_metadata::array_size
CVE-2026-68445 7.8 HIGH drm/vc4: Prevent shader BO mappings from becoming writable
CVE-2026-68440 7.8 HIGH net: txgbe: fix heap overflow when reading module EEPROM
CVE-2026-68442 7.8 HIGH btrfs: don't propagate EXTENT_FLAG_LOGGING to split extent maps
CVE-2026-68439 wifi: mt76: mt7925: fix possible NULL-pointer deref in mt7925_mcu_bss_he_tlv()
CVE-2026-68450 btrfs: free mapping node on duplicate reloc root insert
CVE-2026-68449 ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning
CVE-2026-68448 ovl: check access to copy_file_range source with src mounter creds
CVE-2026-68444 firmware: arm_ffa: Fix NULL dereference in ffa_partition_info_get()
CVE-2026-68443 hwmon: (gigabyte_waterforce) Stop device IO before calling hid_hw_stop
CVE-2026-68441 net/sched: Handle TC_ACT_REDIRECT from qdisc filter chains
CVE-2026-68429 drm/dp_mst: Handle torn-down topology gracefully in drm_dp_mst_topology_queue_probe()
CVE-2026-68438 smp: Make CSD lock acquisition atomic for debug mode
CVE-2026-68437 drm/imagination: Fit paired fragment job in the correct CCCB
CVE-2026-68436 drm/amd/display: use kvzalloc to allocate struct dc
CVE-2026-68435 LoongArch: Fix address space mismatch in kexec command line lookup
CVE-2026-68434 serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms

Showing top 20 of 22 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68447

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