CVE-2026-45861: gfs2: Fix slab-use-after-free in qd_put

CSIRTS triage

What: A use-after-free vulnerability in the GFS2 filesystem's qd_put function causes slab memory corruption.
Who is affected: Linux systems using the GFS2 clustered filesystem.
Urgency: High; CVSS 7.1 indicates kernel memory corruption with potential for privilege escalation or denial-of-service.
Action: Update to a patched Linux kernel version with proper reference counting in GFS2's qd_put function.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-458610.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2026-45861	coverage & exploitation status	NVD · CVE.org

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