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CVE-2026-31523— nvme-pci: ensure we're polling a polled 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nvme-pci未确保轮询队列为轮询队列，可能导致重置期间双重完成。

AI Predicted 4.4 Difficulty: Hard EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 4b04cc6a8f86c4842314def22332de1f15de8523< 965e2c943f065122f14282a88d70a8a92e12a4da affected
4b04cc6a8f86c4842314def22332de1f15de8523< ba167d5982e2eb6ff9356d409eca592ce99555da affected
4b04cc6a8f86c4842314def22332de1f15de8523< 0685dd9cb855ab77fcf3577b4702ba1d6df1c98d affected
4b04cc6a8f86c4842314def22332de1f15de8523< 6f12734c4b619f923a4df0b1a46b8098b187d324 affected
4b04cc6a8f86c4842314def22332de1f15de8523< acbc72dd1a09df53cafcf577259f4678be6afd6d affected
4b04cc6a8f86c4842314def22332de1f15de8523< b96c7b25eb1b748f3e3b1832ebf028b0b223d7e3 affected
4b04cc6a8f86c4842314def22332de1f15de8523< b222680ba55e018426c4535067a008f1d81a5d21 affected
4b04cc6a8f86c4842314def22332de1f15de8523< 166e31d7dbf6aa44829b98aa446bda5c9580f12a affected
… +10 more rows
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I. Basic Information for CVE-2026-31523

Vulnerability Information
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Vulnerability Title
nvme-pci: ensure we're polling a polled queue
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: ensure we're polling a polled queue A user can change the polled queue count at run time. There's a brief window during a reset where a hipri task may try to poll that queue before the block layer has updated the queue maps, which would race with the now interrupt driven queue and may cause double completions.
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nvme-pci未确保轮询队列为轮询队列，可能导致重置期间双重完成。
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 4b04cc6a8f86c4842314def22332de1f15de8523 ~ 965e2c943f065122f14282a88d70a8a92e12a4da -
Linux Linux 5.0 -

II. Public POCs for CVE-2026-31523

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III. Intelligence Information for CVE-2026-31523

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Same Patch Batch · Linux · 2026-04-22 · 100 CVEs total

CVE-2026-31463 9.8 CRITICAL iomap: fix invalid folio access when i_blkbits differs from I/O granularity
CVE-2026-31444 9.8 CRITICAL ksmbd: fix use-after-free and NULL deref in smb_grant_oplock()
CVE-2026-31501 9.8 CRITICAL net: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path
CVE-2026-31436 9.8 CRITICAL dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()
CVE-2026-31478 9.8 CRITICAL ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()
CVE-2026-31448 9.4 CRITICAL ext4: avoid infinite loops caused by residual data
CVE-2026-31450 8.8 HIGH ext4: publish jinode after initialization
CVE-2026-31432 8.8 HIGH ksmbd: fix OOB write in QUERY_INFO for compound requests
CVE-2026-31433 8.8 HIGH ksmbd: fix potencial OOB in get_file_all_info() for compound requests
CVE-2026-31435 8.8 HIGH netfs: Fix read abandonment during retry
CVE-2026-31476 8.2 HIGH ksmbd: do not expire session on binding failure
CVE-2026-31464 8.1 HIGH scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
CVE-2026-31513 8.1 HIGH Bluetooth: L2CAP: Fix stack-out-of-bounds read in l2cap_ecred_conn_req
CVE-2026-31446 7.8 HIGH ext4: fix use-after-free in update_super_work when racing with umount
CVE-2026-31449 7.8 HIGH ext4: validate p_idx bounds in ext4_ext_correct_indexes
CVE-2026-31502 7.8 HIGH team: fix header_ops type confusion with non-Ethernet ports
CVE-2026-31431 7.8 HIGH crypto: algif_aead - Revert to operating out-of-place
CVE-2026-31488 7.8 HIGH drm/amd/display: Do not skip unrelated mode changes in DSC validation
CVE-2026-31490 7.8 HIGH drm/xe/pf: Fix use-after-free in migration restore
CVE-2026-31454 7.8 HIGH xfs: save ailp before dropping the AIL lock in push callbacks

Showing top 20 of 100 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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