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THREAT OPS › Threat News › [NVD] CVE-2026-52946 (HIGH 7.5) — In the Linux kernel, the following vulnerability has been resolved: fs/fcntl: fix SOFTIRQ-unsafe lock order in fasync signaling A SOFTIRQ-safe to SOFTIRQ-unsafe lock order deadlock can occur in send_sigio() and send_sigurg() when a process group receives a signal. When FASYNC

[NVD] CVE-2026-52946 (HIGH 7.5) — In the Linux kernel, the following vulnerability has been resolved: fs/fcntl: fix SOFTIRQ-unsafe lock order in fasync signaling A SOFTIRQ-safe to SOFTIRQ-unsafe lock order deadlock can occur in send_sigio() and send_sigurg() when a process group receives a signal. When FASYNC

lownvdPublished 2026-06-24

CVE-2026-52946 CVSS: 7.5 HIGH Published: 2026-06-24T17:17:04.610

In the Linux kernel, the following vulnerability has been resolved:

fs/fcntl: fix SOFTIRQ-unsafe lock order in fasync signaling

A SOFTIRQ-safe to SOFTIRQ-unsafe lock order deadlock can occur in send_sigio() and send_sigurg() when a process group receives a signal.

When FASYNC is configured for a process group (PIDTYPE_PGID), both

Indicators of compromise

CVE-2026-52946cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-52946