Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-hq39-2qnw-v3dw
Vulnerability ID VCID-hq39-2qnw-v3dw
Aliases CVE-2026-31509
Summary In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix circular locking dependency in nci_close_device nci_close_device() flushes rx_wq and tx_wq while holding req_lock. This causes a circular locking dependency because nci_rx_work() running on rx_wq can end up taking req_lock too: nci_rx_work -> nci_rx_data_packet -> nci_data_exchange_complete -> __sk_destruct -> rawsock_destruct -> nfc_deactivate_target -> nci_deactivate_target -> nci_request -> mutex_lock(&ndev->req_lock) Move the flush of rx_wq after req_lock has been released. This should safe (I think) because NCI_UP has already been cleared and the transport is closed, so the work will see it and return -ENETDOWN. NIPA has been hitting this running the nci selftest with a debug kernel on roughly 4% of the runs.
Status Published
Exploitability 0.5
Weighted Severity 2.4
Risk 1.2
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-833 Deadlock
System Score Found at
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-31509
epss 0.00012 https://api.first.org/data/v1/epss?cve=CVE-2026-31509
epss 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2026-31509
epss 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2026-31509
cvssv3.1 4.7 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-31509.json
https://api.first.org/data/v1/epss?cve=CVE-2026-31509
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-31509
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2460679 https://bugzilla.redhat.com/show_bug.cgi?id=2460679
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.01765
EPSS Score 0.00012
Published At April 29, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-23T05:41:09.109688+00:00 Debian Importer Import https://security-tracker.debian.org/tracker/data/json 38.4.0