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CVE-2025-37823 is a potential use-after-free vulnerability in hfsc_dequeue(), the dequeue function of the Linux kernel's Hierarchical Fair Service Curve (HFSC) network scheduler within net_sched. The issue dates back to Linux kernel 2.6.12. The fix adds safeguards to hfsc_dequeue() against the potential use-after-free condition. No reliable reproducer was available, leaving the precise triggering conditions and practical exploitability unestablished.
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No public exploit code observed for this vulnerability.
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15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A potential use-after-free vulnerability in the Linux kernel's HFSC network scheduler function hfsc_dequeue(). The advisory assigns a CVSS v3 base score of 7.8, with local access and low privileges required and potentially high confidentiality, integrity, and availability impacts. Remediation is to update the linux package and related packages to version 6.1.137-1 or later.
A high-impact local vulnerability requiring low privileges and no user interaction, with high confidentiality, integrity, and availability impact according to the supplied CVSS v3 vector.
A potential use-after-free vulnerability in the Linux kernel's net_sched HFSC scheduler dequeue path.
A potential use-after-free vulnerability in the Linux kernel HFSC network scheduler's hfsc_dequeue() function.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.