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CVE-2026-43064— dmaengine: idxd: Fix not releasing workqueue on .release()

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idxd驱动在释放对象时未释放关联的工作队列。

AI Predicted 5.5 Difficulty: Hard EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3< 70ae35be58d476e2fd9f7a941a5e03b2f5fadb8d affected
47c16ac27d4cb664cee53ee0b9b7e2f907923fb3< b22fd53b2ceb35445475f0edab13a908c5fb8433 affected
47c16ac27d4cb664cee53ee0b9b7e2f907923fb3< 2bb9e9e93adff9cc8a138ae9a3a8d59b3452272e affected
47c16ac27d4cb664cee53ee0b9b7e2f907923fb3< d02c24af126dee45247dc7890409c86d1831859d affected
47c16ac27d4cb664cee53ee0b9b7e2f907923fb3< 958e96533ddbd1edd127feb7624a7eed0cc379dc affected
47c16ac27d4cb664cee53ee0b9b7e2f907923fb3< fc34f199eb576b3a73089452fdf0056cc9a9301d affected
47c16ac27d4cb664cee53ee0b9b7e2f907923fb3< 3d33de353b1ff9023d5ec73b9becf80ea87af695 affected
3f0e87eb9680975184e98aed0e8866b4442a31f6 affected
… +12 more rows
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I. Basic Information for CVE-2026-43064

Vulnerability Information
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Vulnerability Title
dmaengine: idxd: Fix not releasing workqueue on .release()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix not releasing workqueue on .release() The workqueue associated with an DSA/IAA device is not released when the object is freed.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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idxd驱动在释放对象时未释放关联的工作队列。
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 47c16ac27d4cb664cee53ee0b9b7e2f907923fb3 ~ 70ae35be58d476e2fd9f7a941a5e03b2f5fadb8d -
Linux Linux 5.13 -

II. Public POCs for CVE-2026-43064

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-43064

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Patches & Fixes for CVE-2026-43064 (7)

Same Patch Batch · Linux · 2026-05-05 · 15 CVEs total

CVE-2026-43067 9.8 CRITICAL ext4: handle wraparound when searching for blocks for indirect mapped blocks
CVE-2026-43071 9.1 CRITICAL dcache: Limit the minimal number of bucket to two
CVE-2026-43070 7.8 HIGH bpf: Reset register ID for BPF_END value tracking
CVE-2026-43063 7.8 HIGH xfs: don't irele after failing to iget in xfs_attri_recover_work
CVE-2026-43060 7.8 HIGH netfilter: nft_ct: drop pending enqueued packets on removal
CVE-2026-43062 7.1 HIGH Bluetooth: L2CAP: Fix type confusion in l2cap_ecred_reconf_rsp()
CVE-2026-43073 x86-64: rename misleadingly named '__copy_user_nocache()' function
CVE-2026-43072 drm/vc4: platform_get_irq_byname() returns an int
CVE-2026-43069 Bluetooth: hci_ll: Fix firmware leak on error path
CVE-2026-43068 ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()
CVE-2026-43066 ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths
CVE-2026-43065 ext4: always drain queued discard work in ext4_mb_release()
CVE-2026-43061 serial: 8250: Fix TX deadlock when using DMA
CVE-2026-43059 Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43064

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